iankelling.org Git - distro-setup/blob - mail-setup

   1 #!/bin/bash
   2 # * intro
   3 # Copyright (C) 2019 Ian Kelling
   4 # SPDX-License-Identifier: AGPL-3.0-or-later
   5
   6 # Things I tend to forget. on MAIL_HOST, daemon runs with /etc/exim4/my.conf,
   7 # due to /etc/default/exim4 containing:
   8 # COMMONOPTIONS='-C /etc/exim4/my.conf'
   9 # UPEX4OPTS='-o /etc/exim4/my.conf'
  10 #
  11 # The non-daemon config
  12 # gets generated from this script calling update-exim4.conf -d /etc/myexim4
  13 # which has log path
  14 # log_file_path = /var/log/exim4/my%s
  15 #
  16 # On non bk|MAIL_HOST, the config and log file are all standard.
  17 #
  18 # eximbackup folder is /bu/md
  19 # it is cleaned up by mail-backup-clean, which is run by btrbk-run
  20
  21 # shellcheck disable=SC2254 # makes for a lot of unneeded quotes
  22
  23
  24 # perusing through /el/mainlog without test messages:
  25 # &!testignore|jtuttle|
  26 #
  27 #&! testignore|jtuttle|eximbackup|/usr/sbin/exim4 -bpu
  28
  29 # todo: this message seems to get dropped on the floor, it was due to a missing 2nd colon in
  30 #  condition = ${if def:h_fdate:}
  31 # Figure out how to avoid this message being discarded.
  32
  33 # 2023-09-12 01:41:43 [722371] 1qfw9f-0031v9-0S <= ian@iankelling.org U=iank P=local S=483 id=87cyyogd7t.fsf@iankelling.org T="iank2" from <ian@iankelling.org> for testignore@amnimal.ninja
  34 # 2023-09-12 01:41:43 [722373] 1qfw9f-0031v9-0S H=nn.b8.nz [10.173.8.2]: SMTP error from remote mail server after pipelined end of data: 451 Temporary local problem - please try later
  35 # 2023-09-12 01:41:43 [722372] 1qfw9f-0031v9-0S == testignore@amnimal.ninja R=smarthost T=remote_smtp_smarthost defer (-46) H=nn.b8.nz [10.173.8.2] DT=0s: SMTP error from remote mail server after pipelined end of data: 451 Temporary local problem - please try later
  36
  37 # todo: check new macro DKIM_TIMESTAMPS
  38
  39 # todo: check if REMOTE_SMTP_INTERFACE or REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE can simplify my or fsfs config
  40
  41 # todo: max line length macro changed in t11. look into it
  42 # todo: check that all macros we use are still valid in t11
  43
  44 # todo: setup an alert for bouncing test emails.
  45
  46 # todo: bounces to my fsf mail can come from fsf@iankelling.org,
  47 # think about making bounces go from the original address.
  48
  49 # todo: add a prometheus alert for dovecot.
  50
  51 # todo: handle errors like this:
  52 # Mar 02 12:44:26 kw systemd[1]: exim4.service: Found left-over process 68210 (exim4) in control group while starting unit. Ignoring.
  53 # Mar 02 12:44:26 kw systemd[1]: This usually indicates unclean termination of a previous run, or service implementation deficiencies.
  54 #eg: on eggs, on may 1st, ps grep for exim, 2 daemons running. 1 leftover from a month ago
  55 #Debian-+  1954     1  0 36231 11560   4 Apr02 ?        00:40:25 /usr/sbin/exim4 -bd -q30m
  56 #Debian-+ 23058  1954  0 36821 10564   0 20:38 ?        00:00:00 /usr/sbin/exim4 -bd -q30m
  57
  58 #  todo: harden dovecot. need to do some research. one way is for it to only listen on a wireguard vpn interface, so only clients that are on the vpn can access it.
  59 #  todo: consider hardening cups listening on 0.0.0.0
  60 #  todo: stop/disable local apache, and rpc.mountd, and kdeconnect when not in use.
  61
  62 # todo:  hosts should only allow external mail that is authed and
  63 # destined for backup route. it is a minor issue since traffic is
  64 # limited to the wghole network.
  65
  66 # todo: emailing info@amnimal.ninja produces a bounce, user doesn't exist
  67 # instead of a simple rejection like it should.
  68
  69 # todo: run mailping test after running, or otherwise
  70 # clear out terminal alert
  71
  72 # todo: disable postgrey
  73
  74 # todo: in testforward-check, we should also look
  75
  76 # todo: test that bounces dont help create valid mailtest-check
  77
  78 # todo: move mail stuff in distro-end into this file
  79
  80 # todo: consider rotating dkim & publishing key so every past email I sent
  81 # isnt necessarily signed
  82
  83 # todo: consider how to get clamav out of Debian-exim group
  84 # so it cant read/write the whole mail spool, for better
  85 # security.
  86
  87 # todo: create a cronjob to update or warn on expiring dnssec keys
  88
  89 # todo: we should test failed mail daily or so
  90 # failed cronjob, failed sysd-log-once,
  91 # a local bounce from a cronjob, a local bounce
  92 # to a bad remote address, perhaps a local failure
  93 # when the sending daemon is down.
  94 # And send an alert email if no alerts have been sent
  95 # in 2 or 3 days or something. todo, test cron mail on li.
  96
  97 # todo: look at mailinabox extra dns records, note these changelogs:
  98 # - An MTA-STS policy for incoming mail is now published (in DNS and over HTTPS) when the primary hostname and email address domain both have a signed TLS certificate installed, allowing senders to know that an encrypted connection should be enforced.
  99 # - The per-IP connection limit to the IMAP server has been doubled to allow more devices to connect at once, especially with multiple users behind a NAT.
 100 #
 101
 102 # todo: mailtest-check failure on remote hosts is not going to alert me.
 103 # sort that out.
 104 # todo: test mail failure as well as success.
 105 #
 106 # todo: validate that mailtest-check is doing dnsbl checks.
 107
 108 # background: I want to run exim in a network namespace so it can send
 109 # and receive through a vpn. This is needed so it can do ipv6, because
 110 # outside the namespace if we dont have ipv6, to send ipv6 through the
 111 # vpn, we have to send all our ipv6 through the vpn. I did this for a
 112 # long time, it was fine, but it causes various pains, like increased
 113 # latency, increased recaptcha because my ip is from a data center, just
 114 # various issues I dont want on all the time. The problem with the
 115 # namespace is that all kinds of programs want to invoke exim, but they
 116 # wont be in the namespace. I could replace exim with a wrapper that
 117 # jumps into the namespace, i tried that, it works fine.  One remaining
 118 # problem was that I would have needed to hook into exim upgrades to
 119 # move exim and replace it with my wrapper script. Also, my script to
 120 # join the namespace is not super reliable because it uses a pgrep.
 121 # Instead, I should have created a systemd service for a process that
 122 # will never die and just writes its pid somewhere convenient.
 123 # That implementation
 124 # is below here:
 125 #
 126 # sudoers:
 127 # user ALL=(ALL) /usr/sbin/exim4
 128 #
 129 # move exim4 to eximian, use this script for exim4:
 130 #
 131 # #!/bin/bash
 132 # if ip a show veth1-mail &>/dev/null; then
 133 #   /usr/sbin/eximian "$@"
 134 #   exit
 135 # fi
 136 # dosudo=false
 137 # if [[ $USER && $USER != root ]]; then
 138 #   dosudo=true
 139 # fi
 140 # pid=$(pgrep -f "/usr/sbin/openvpn .* --config /etc/openvpn/.*mail.conf")
 141 # if $dosudo; then
 142 #   sudo nsenter -t $pid -n -m sudo -u $USER /usr/sbin/eximian "$@"
 143 # else
 144 #   nsenter -t $pid -n -m /usr/sbin/eximian "$@"
 145 # fi
 146 # ## end script
 147 #
 148 # an alternate solution: there is a small setguid program for
 149 # network namespaces in my bookmarks.
 150 #
 151 # However, the solution I went with is: have 2 exim
 152 # configs. A nonstandard location for the daemon that runs
 153 # in the namespace. For all other invocations, it uses
 154 # the default config location, which is altered to be
 155 # in a smarthost config which sends mail to the deaemon.
 156 #
 157 # I have a bash function, enn to invoke exim like the daemon is running.
 158 # and mailbash to just enter its network namespace.
 159
 160 if [ -z "$BASH_VERSION" ]; then echo "error: shell is not bash" >&2; exit 1; fi
 161
 162 shopt -s nullglob
 163
 164 if [[ -s /usr/local/lib/err ]]; then
 165   source /usr/local/lib/err
 166 elif [[ -s /a/bin/errhandle/err ]]; then
 167   source /a/bin/errhandle/err
 168 else
 169   echo "no err tracing script found"
 170   exit 1
 171 fi
 172 source /a/bin/distro-functions/src/identify-distros
 173 source /a/bin/distro-functions/src/package-manager-abstractions
 174
 175 # has nextcloud_admin_pass in it
 176 f=/p/c/machine_specific/$HOSTNAME/mail
 177 if [[ -e $f ]]; then
 178   # shellcheck source=/p/c/machine_specific/bk/mail
 179   source $f
 180 fi
 181
 182
 183 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
 184
 185 # note, this is hardcoded in /etc/exim4/conf.d/main/000_local
 186 u=$(id -nu 1000)
 187
 188
 189 usage() {
 190   cat <<EOF
 191 Usage: ${0##*/} anything_here_to_debug
 192 Setup exim4 & dovecot & related things
 193
 194 -h|--help  Print help and exit.
 195 EOF
 196   exit $1
 197 }
 198
 199 # debug output if we pass any arg
 200 if (( $# )); then
 201   set -x
 202 fi
 203
 204
 205 ####### instructions for icedove #####
 206 # Incoming mail server: mail.iankelling.org, port 143, username iank, connection security starttls, authentication method normal password,
 207 # then click advanced so it accepts it.
 208 # we could also just use 127.0.0.1 with no ssl
 209 #
 210 # hamburger -> preferences -> preferences -> advanced tab -> config editor button -> security.ssl.enable_ocsp_must_staple = false
 211 # background: dovecot does not yet have ocsp stapling support
 212 # reference: https://community.letsencrypt.org/t/simple-guide-using-lets-encrypt-ssl-certs-with-dovecot/2921
 213 #
 214 # for phone, k9mail, fdroid, same thing but username alerts, pass in ivy-pass.
 215 # also, bk.b8.nz for secondary alerts, username is iank. same alerts pass.
 216 # fetching mail settings: folder poll frequency 10 minutes.
 217 # account settings, fetching mail, push folders: All. Then disable the persistent notification.
 218 #######
 219
 220
 221 # * perstent password instructions
 222 # Note: for cert cron, we need to manually run first to accept known_hosts
 223
 224 # # exim passwords:
 225 # # for hosts which have all private files I just use the same user
 226 # # for other hosts, each one get\'s their own password.
 227 # # for generating secure pass, and storing for server too:
 228 # f=$(mktemp)
 229 # host=tp
 230 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$f
 231 # s sed -i "/^$host:/d" /p/c/filesystem/etc/exim4/passwd
 232 # echo "$host:$(mkpasswd -m sha-512 -s <$f)" >>/p/c/filesystem/etc/exim4/passwd
 233 # #reference: exim4_passwd_client(5)
 234 # dir=/p/c/machine_specific/$host/filesystem/etc/exim4
 235 # mkdir -p $dir
 236 # echo "mail.iankelling.org:$host:$(<$f)" > $dir/passwd.client
 237 # # then run this script
 238
 239 # # dovecot password, i just need 1 as I\'m the only user
 240 # mkdir /p/c/filesystem/etc/dovecot
 241 # echo "iank:$(doveadm pw -s SHA512-CRYPT)::::::" >>/p/c/filesystem/etc/dovecot/users
 242
 243 ####### end perstent password instructions ######
 244
 245
 246 # * dkim dns
 247 # # Remove 1 level of comments in this section, set the domain var
 248 # # for the domain you are setting up, then run this and copy dns settings
 249 # # into dns.
 250 # domain=iankelling.org
 251 # c /p/c/filesystem/etc/exim4
 252 # # this has several bugs addressed in comments, but it was helpful
 253 # # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
 254
 255 # openssl genrsa -out $domain-private.pem 2048
 256 # # Then, to get the public key strings to put in bind:
 257
 258 # # selector is needed for having multiple keys for one domain.
 259 # # I dun do that, so just use a static one: li
 260 # # Debadmin page does not have v=, fastmail does, and this
 261 # # says it\'s recommended in 3.6.1, default is DKIM1 anyways.
 262 # # https://www.ietf.org/rfc/rfc6376.txt
 263 # # Join and print all but first and last line.
 264 # # last line: swap hold & pattern, remove newlines, print.
 265 # # lines 2+: append to hold space
 266 # echo "bind txt record: remember to truncate $domain so its relative to the bind zone"
 267 # cat <<EOF
 268 # a._domainkey.$domain  TXT     (
 269 # "v=DKIM1\059 k=rsa\059 p=$(openssl rsa -in $domain-private.pem -pubout |&sed -rn '${x;s/\n//g;s/^(.*)(.{240}$)/\1"\n"\2/p};3,$H')" )
 270 # EOF
 271 # # sed explanation: skip the first few lines, then put them into the hold space, then
 272 # # on the last line, back to the patern space, remove the newlines, then add a newline
 273 # # at the last char - 240, because bind txt records need strings <=255 chars,
 274 # # other dkim stuff at the begining is is 25 chars, and the pubkey is 393, so this
 275 # # leaves us a bit of extra room at the end and a bunch at the beginning.
 276
 277 # # selector was also put into /etc/exim4/conf.d/main/000_local,
 278
 279 # * dmarc dns
 280
 281 # # 2017-02 dmarc policies:
 282 # # host -t txt _dmarc.gmail.com
 283 # # yahoo: p=reject, hotmail: p=none, gmail: p=none, fastmail none for legacy reasons
 284 # # there were articles claiming gmail would be  changing
 285 # # to p=reject, in early 2017, which didn\'t happen. I see no sources on them. It\'s
 286 # # expected to cause problems
 287 # # with a few old mailing lists, copying theirs for now.
 288 #
 289 # echo "dmarc dns, name: _dmarc value: v=DMARC1; p=none; rua=mailto:mailauth-reports@$domain"
 290
 291 # * other dns
 292
 293 # # 2017-02 spf policies:
 294 # # host -t txt lists.fedoraproject.org
 295 # # google ~all, hotmail ~all, yahoo: ?all, fastmail ?all, outlook ~all
 296 # # i include fastmail\'s settings, per their instructions,
 297 # # and follow their policy. In mail in a box, or similar instructions,
 298 # # I\'ve seen recommended to not use a restrictive policy.
 299
 300 # # to check if dns has updated, you do
 301 # host -a mesmtp._domainkey.$domain
 302
 303 # # mx records,
 304 # # setting it to iankelling.org would work the same, but this
 305 # # is more flexible, I could change where mail.iankelling.org pointed.
 306 # cat <<'EOF'
 307 # mx records, 2 records each, for * and empty domain
 308 # pri 10 mail.iankelling.org
 309 # EOF
 310
 311 # # dnssec
 312 # from brc2, run dnsecgen then dsign, update named.local.conf, publish keys to registrar
 313
 314 # * functions & constants
 315
 316 pre="${0##*/}:${SSH_CLIENT:+ $HOSTNAME:}"
 317 m() { printf "$pre %s\n"  "$*"; "$@"; }
 318 e() { printf "$pre %s\n"  "$*"; }
 319 err() { printf "$pre %s\n"  "$*" >&2; exit 1; }
 320
 321 reload=false
 322 # This file is so if we fail in the middle and rerun, we dont lose state
 323 if [[ -e /var/local/mail-setup-reload ]]; then
 324   reload=true
 325 fi
 326 u() { # update file. note: duplicated in brc
 327   local tmp tmpdir dest="$1"
 328   local base="${dest##*/}"
 329   local dir="${dest%/*}"
 330   if [[ $dir != "$base" ]]; then
 331     # dest has a directory component
 332     mkdir -p "$dir"
 333   fi
 334   ur=false # u result
 335   tmpdir=$(mktemp -d)
 336   cat >$tmpdir/"$base"
 337   tmp=$(rsync -ic $tmpdir/"$base" "$dest")
 338   if [[ $tmp ]]; then
 339     printf "%s\n" "$tmp"
 340     ur=true
 341     if [[ $dest == /etc/systemd/system/* ]]; then
 342       touch /var/local/mail-setup-reload
 343       reload=true
 344     fi
 345   fi
 346   rm -rf $tmpdir
 347 }
 348 setini() {
 349   key="$1" value="$2" section="$3"
 350   file="/etc/radicale/config"
 351   sed -ri "/ *\[$section\]/,/^ *\[[^]]+\]/{/^\s*${key}[[:space:]=]/d};/ *\[$section\]/a $key = $value" "$file"
 352 }
 353 soff () {
 354   for service; do
 355     # ignore services that dont exist
 356     if systemctl cat $service &>/dev/null; then
 357       m systemctl disable --now $service
 358     fi
 359   done
 360 }
 361 sre() {
 362   local enabled
 363   for service; do
 364     m systemctl restart $service
 365     # Optimization for exim,
 366     # is-enabled: 0m0.015s
 367     # enable: 0m0.748s
 368     # It is related to this message:
 369     # exim4.service is not a native service, redirecting to systemd-sysv-install.
 370     # Executing: /lib/systemd/systemd-sysv-install enable exim4
 371     enabled=$(systemctl is-enabled $service 2>/dev/null ||:)
 372     if [[ $enabled != enabled ]]; then
 373       m systemctl enable $service
 374     fi
 375   done
 376 }
 377 mailhost() {
 378   [[ $HOSTNAME == "$MAIL_HOST" ]]
 379 }
 380 e() { printf "%s\n" "$*"; }
 381 reifactive() {
 382   for service; do
 383     if systemctl is-active $service >/dev/null; then
 384       m systemctl restart $service
 385     fi
 386   done
 387 }
 388 stopifactive() {
 389   for service; do
 390     if systemctl is-active $service >/dev/null; then
 391       m systemctl stop $service
 392     fi
 393   done
 394 }
 395
 396 mxhost=mx.iankelling.org
 397 mxport=587
 398
 399 # old setup. left as comment for example
 400 # mxhost=mail.messagingengine.com
 401 # mxport=587
 402 # forward=ian@iankelling.org
 403
 404 smarthost="$mxhost::$mxport"
 405 uhome=$(eval echo ~$u)
 406
 407 # Somehow on one machine, a file got written with 664 perms.
 408 # just being defensive here.
 409 umask 0022
 410
 411 source /a/bin/bash_unpublished/source-state
 412 if [[ ! $MAIL_HOST ]]; then
 413   err "\$MAIL_HOST not set"
 414 fi
 415
 416 bhost_t=false
 417 case $HOSTNAME in
 418   $MAIL_HOST) : ;;
 419   kd|frodo|x2|x3|kw|sy|bo)
 420     bhost_t=true
 421     ;;
 422 esac
 423
 424
 425 # * Install universal packages
 426
 427
 428 # installs epanicclean iptables-exim ip6tables-exim
 429 /a/bin/ds/install-my-scripts
 430
 431 if [[ $(debian-codename-compat) == bionic ]]; then
 432   cat >/etc/apt/preferences.d/spamassassin <<'EOF'
 433 Package: spamassassin sa-compile spamc
 434 Pin: release n=focal,o=Ubuntu
 435 Pin-Priority: 500
 436 EOF
 437 fi
 438
 439 # light version of exim does not have sasl auth support.
 440 # note: for bitfolk hosts, unbound has important config with conflink.
 441 pi-nostart exim4 exim4-daemon-heavy spamassassin unbound clamav-daemon wireguard
 442
 443 # note: pyzor debian readme says you need to run some initialization command
 444 # but its outdated.
 445 pi spf-tools-perl p0f postgrey pyzor razor jq moreutils certbot fail2ban
 446 case $HOSTNAME in
 447   je) : ;;
 448   # not included due to using wireguard: openvpn
 449   *) pi wget git unzip iptables ;;
 450 esac
 451 # bad packages that sometimes get automatically installed
 452 pu openresolv resolvconf
 453
 454 soff openvpn
 455
 456
 457 if [[ $(debian-codename) == etiona ]]; then
 458   # ip6tables stopped loading on boot. openvpn has reduced capability set,
 459   # so running iptables as part of openvpn startup wont work. This should do it.
 460   pi iptables-persistent
 461   cat >/etc/iptables/rules.v6 <<'EOF'
 462 *mangle
 463 COMMIT
 464 *nat
 465 COMMIT
 466 EOF
 467   # load it now.
 468   m ip6tables -S >/dev/null
 469 fi
 470
 471 # our nostart pi fails to avoid enabling
 472
 473
 474 # * Mail clean cronjob
 475
 476 u /etc/systemd/system/mailclean.timer <<'EOF'
 477 [Unit]
 478 Description=Run mailclean daily
 479
 480 [Timer]
 481 OnCalendar=monthly
 482
 483 [Install]
 484 WantedBy=timers.target
 485 EOF
 486
 487 u /etc/systemd/system/mailclean.service <<EOF
 488 [Unit]
 489 Description=Delete and archive old mail files
 490 After=multi-user.target
 491
 492 [Service]
 493 User=$u
 494 Type=oneshot
 495 ExecStart=/usr/local/bin/sysd-mail-once mailclean /a/bin/distro-setup/mailclean
 496 EOF
 497
 498 # * postgrey
 499
 500
 501 u /etc/default/postgrey <<'EOF'
 502 POSTGREY_OPTS="--exim --unix=/var/run/postgrey/postgrey.sock --retry-window=4 --max-age=60"
 503 EOF
 504
 505 # * clamav
 506
 507 # old file. remove when all hosts updated, 2023-09-11
 508 rm -fv /etc/exim4/conf.d/clamav_data_acl
 509
 510 m usermod -a -G Debian-exim clamav
 511
 512 u /etc/systemd/system/clamav-daemon.service.d/fix.conf <<EOF
 513 [Service]
 514 ExecStartPre=-/bin/mkdir -p /var/run/clamav
 515 ExecStartPre=/bin/chown clamav /var/run/clamav
 516 EOF
 517
 518 # * mail vpn config
 519
 520 # old.
 521 #vpnser=mailvpn.service
 522 # note: this hangs if it cant resolv the endpoint. we
 523 # want it to just retry in the background. i just use a static ip instead.
 524 #
 525 # Note: at least on t10, on reboot, the service fails to come up according to systemd, but
 526 # in reality it is up and working, then it tries to restart infinitely, and fails
 527 # because it detects that the interface exists.
 528 #
 529 # failing output:
 530 #
 531 # Aug 02 21:59:27 sy wg-quick[2092]: [#] sysctl -q net.ipv4.conf.all.src_valid_mark=1
 532 # Aug 02 21:59:27 sy wg-quick[2248]: [#] iptables-restore -n
 533 # Aug 02 21:59:27 sy wg-quick[2249]: Another app is currently holding the xtables lock. Perhaps you want to use the -w option?
 534 # Aug 02 21:59:27 sy wg-quick[2259]: [#] iptables-restore -n
 535 # Aug 02 21:59:27 sy wg-quick[2260]: Another app is currently holding the xtables lock. Perhaps you want to use the -w option?
 536 # Aug 02 21:59:27 sy systemd[1]: wg-quick@wgmail.service: Main process exited, code=exited, status=4/NOPERMISSION
 537
 538
 539 # successful output.
 540 # Aug 03 14:12:47 sy wg-quick[711336]: [#] sysctl -q net.ipv4.conf.all.src_valid_mark=1
 541 # Aug 03 14:12:47 sy wg-quick[711384]: [#] iptables-restore -n
 542 # Aug 03 14:12:47 sy wg-quick[711336]: [#] ping -w10 -c1 10.8.0.1 ||:
 543 # Aug 03 14:12:47 sy wg-quick[711389]: PING 10.8.0.1 (10.8.0.1) 56(84) bytes of data.
 544 # Aug 03 14:12:47 sy wg-quick[711389]: 64 bytes from 10.8.0.1: icmp_seq=1 ttl=64 time=73.0 ms
 545 # Aug 03 14:12:47 sy wg-quick[711389]: --- 10.8.0.1 ping statistics ---
 546 # Aug 03 14:12:47 sy wg-quick[711389]: 1 packets transmitted, 1 received, 0% packet loss, time 0ms
 547 # Aug 03 14:12:47 sy wg-quick[711389]: rtt min/avg/max/mdev = 72.993/72.993/72.993/0.000 ms
 548 # Aug 03 14:12:47 sy systemd[1]: Finished WireGuard via wg-quick(8) for wgmail.
 549 # Aug 02 21:59:27 sy systemd[1]: wg-quick@wgmail.service: Failed with result 'exit-code'.
 550 # Aug 02 21:59:27 sy systemd[1]: Failed to start WireGuard via wg-quick(8) for wgmail.
 551 # Aug 02 21:59:47 sy systemd[1]: wg-quick@wgmail.service: Scheduled restart job, restart counter is at 1.
 552 # Aug 02 21:95:47 sy systemd[1]: Stopped WireGuard via wg-quick(8) for wgmail.
 553 # Aug 02 21:59:47 sy systemd[1]: Starting WireGuard via wg-quick(8) for wgmail...
 554 # Aug 02 21:59:47 sy wg-quick[3424]: wg-quick: `wgmail' already exists
 555 # Aug 02 21:59:47 sy systemd[1]: wg-quick@wgmail.service: Main process exited, code=exited, status=1/FAILURE
 556 # Aug 02 21:59:47 sy systemd[1]: wg-quick@wgmail.service: Failed with result 'exit-code'.
 557 # Aug 02 21:59:47 sy systemd[1]: Failed to start WireGuard via wg-quick(8) for wgmail.
 558
 559
 560 # According to iptables -S and iptables -t nat -S,
 561 # there are no modifications to iptables rules on a succsfull run,
 562 # and
 563
 564 vpnser=wg-quick@wgmail.service
 565
 566 case $HOSTNAME in
 567   $MAIL_HOST)
 568     rsync -aiSAX --chown=root:root --chmod=g-s /p/c/filesystem/etc/wireguard/ /etc/wireguard
 569     bindpaths="/etc/127.0.0.1-resolv:/run/systemd/resolve /etc/basic-nsswitch:/etc/resolved-nsswitch:norbind"
 570     ;;&
 571   bk)
 572     bindpaths="/etc/10.173.8.1-resolv:/etc/127.0.0.1-resolv"
 573     ;;&
 574   *)
 575     d=/p/c/machine_specific/$HOSTNAME/filesystem/etc/wireguard/
 576     if [[ -d $d ]]; then
 577       rsync -aiSAX --chown=root:root --chmod=g-s $d  /etc/wireguard
 578     fi
 579     ;;
 580 esac
 581
 582 case $HOSTNAME in
 583   li) : ;;
 584   *)
 585     u /etc/systemd/system/wg-quick@wgmail.service.d/override.conf <<EOF
 586 [Unit]
 587 Requires=mailnn.service
 588 JoinsNamespaceOf=mailnn.service
 589 BindsTo=mailnn.service
 590 StartLimitIntervalSec=0
 591
 592 [Service]
 593 PrivateNetwork=true
 594 # i dont think we need any of these, but it doesnt hurt to stay consistent
 595 BindPaths=$bindpaths
 596
 597 Restart=on-failure
 598 RestartSec=20
 599 EOF
 600     ;;
 601 esac
 602
 603
 604 # https://selivan.github.io/2017/12/30/systemd-serice-always-restart.html
 605 u /etc/systemd/system/mailvpn.service <<EOF
 606 [Unit]
 607 Description=OpenVPN tunnel for mail
 608 After=syslog.target network-online.target mailnn.service
 609 Wants=network-online.target
 610 Documentation=man:openvpn(8)
 611 Documentation=https://community.openvpn.net/openvpn/wiki/Openvpn24ManPage
 612 Documentation=https://community.openvpn.net/openvpn/wiki/HOWTO
 613 # needed to continually restatr
 614 JoinsNamespaceOf=mailnn.service
 615 BindsTo=mailnn.service
 616 StartLimitIntervalSec=0
 617
 618 [Service]
 619 Type=notify
 620 RuntimeDirectory=openvpn-client
 621 RuntimeDirectoryMode=0710
 622 WorkingDirectory=/etc/openvpn/client
 623 ExecStart=/usr/sbin/openvpn --suppress-timestamps --nobind --config /etc/openvpn/client/mail.conf
 624 #CapabilityBoundingSet=CAP_IPC_LOCK CAP_NET_ADMIN CAP_NET_RAW CAP_SETGID CAP_SETUID CAP_SYS_CHROOT CAP_DAC_OVERRIDE
 625 LimitNPROC=10
 626 # DeviceAllow=/dev/null rw
 627 # DeviceAllow=/dev/net/tun rw
 628 PrivateNetwork=true
 629 # in the network namespace, we cant connect to systemd-resolved on 127.0.0.53,
 630 # because of
 631 # https://unix.stackexchange.com/questions/445782/how-to-allow-systemd-resolved-to-listen-to-an-interface-other-than-loopback
 632 # there is a workaround there, but i dont think its really worth it,
 633 # the mail server is fine with a static dns anyways.
 634 # This thread is also interesting,
 635 # https://github.com/slingamn/namespaced-openvpn/issues/7
 636 # todo: the iptables rule at the bottom could be useful to prevent
 637 # dns from leaking in my network namespaced vpn.
 638 # I also like the idea of patching systemd-resolved so it
 639 # will listen on other interfaces, but its not worth my time.
 640 BindPaths=$bindpaths
 641 Restart=always
 642 # time to sleep before restarting a service
 643 RestartSec=20
 644
 645 [Install]
 646 WantedBy=multi-user.target
 647 EOF
 648
 649 u /etc/systemd/system/mailnnroute.service <<'EOF'
 650 [Unit]
 651 Description=Network routing for mailnn
 652 After=syslog.target network-online.target mailnn.service
 653 Wants=network-online.target
 654 JoinsNamespaceOf=mailnn.service
 655 BindsTo=mailnn.service
 656 StartLimitIntervalSec=0
 657
 658 [Service]
 659 Type=simple
 660 RemainAfterExit=true
 661 PrivateNetwork=true
 662 ExecStart=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns -n 10.173.8 start mail
 663 ExecStop=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns stop mail
 664 Restart=always
 665 RestartSec=20
 666
 667
 668 [Install]
 669 WantedBy=multi-user.target
 670 EOF
 671
 672 #
 673 u /etc/systemd/system/mailnn.service <<'EOF'
 674 [Unit]
 675 Description=Network Namespace for mail vpn service that will live forever and cant fail
 676 After=syslog.target network-online.target
 677 Wants=network-online.target
 678
 679 [Service]
 680 Type=simple
 681 PrivateNetwork=true
 682 ExecStart=/bin/sleep infinity
 683
 684 [Install]
 685 WantedBy=multi-user.target
 686 EOF
 687
 688 u /etc/systemd/system/mailbindwatchdog.service <<EOF
 689 [Unit]
 690 Description=Watchdog to restart services relying on systemd-resolved dir
 691 After=syslog.target network-online.target
 692 Wants=network-online.target
 693 BindsTo=mailnn.service
 694
 695 [Service]
 696 Type=simple
 697 ExecStart=/usr/local/bin/mailbindwatchdog $vpnser ${nn_progs[@]} unbound.service radicale.service
 698 Restart=always
 699 # time to sleep before restarting a service
 700 RestartSec=10
 701
 702 [Install]
 703 WantedBy=multi-user.target
 704 EOF
 705
 706
 707
 708 # old service name
 709 rm -fv /etc/systemd/system/openvpn-client-mail@.service
 710
 711 # We use a local unbound because systemd-resolved wont accept our
 712 # request, it will only listen to 127.0.0.53 in the main network
 713 # namespace, and rejected feature requests to change that (although I
 714 # could change the code and recompile), but anyways, that could answer
 715 # with things specific to the lan that aren't applicable in this
 716 # namespace, and since unbound is a recursive resolver, it means we just
 717 # use our own ip against dnsbl rate limits.
 718 #
 719 # If we ever notice this change, chattr +i on it
 720 # trust-ad is used in t10+, glibc 2.31
 721
 722 u /etc/127.0.0.1-resolv/stub-resolv.conf <<'EOF'
 723 nameserver 127.0.0.1
 724 options edns0 trust-ad
 725 EOF
 726
 727 u /etc/127.0.0.53-resolv/stub-resolv.conf <<'EOF'
 728 nameserver 127.0.0.53
 729 options edns0 trust-ad
 730 EOF
 731
 732
 733 u /etc/10.173.8.1-resolv/stub-resolv.conf <<'EOF'
 734 nameserver 10.173.8.1
 735 options edns0 trust-ad
 736 EOF
 737
 738 # this is just a bug fix for trisquel.
 739 f=/etc/apparmor.d/usr.sbin.unbound
 740 line="/usr/sbin/unbound flags=(attach_disconnected) {"
 741 if ! grep -qFx "$line" $f; then
 742   badline="/usr/sbin/unbound {"
 743   if ! grep -qFx "$badline" $f; then
 744     err expected line in $f not found
 745   fi
 746   sed -i "s,^$badline$,$line," $f
 747   if systemctl is-active apparmor &>/dev/null; then
 748     m systemctl reload apparmor
 749   fi
 750 fi
 751
 752 # note: anything added to nn_progs needs corresponding rm
 753 # down below in the host switch
 754 nn_progs=(exim4)
 755 if mailhost; then
 756   # Note dovecots lmtp doesnt need to be in the same nn to accept delivery.
 757   # Its in the nn so remote clients can connect to it.
 758   nn_progs+=(spamassassin dovecot)
 759 fi
 760
 761 case $HOSTNAME in
 762   $MAIL_HOST)
 763     # todo, should this be after vpn service
 764     u /etc/systemd/system/unbound.service.d/nn.conf <<EOF
 765 [Unit]
 766 After=mailnn.service
 767 JoinsNamespaceOf=mailnn.service
 768 BindsTo=mailnn.service
 769 StartLimitIntervalSec=0
 770
 771 [Service]
 772 PrivateNetwork=true
 773 # note the nsswitch bind is actually not needed for bk, but
 774 # its the same file so it does no harm.
 775 BindPaths=$bindpaths
 776
 777 Restart=always
 778 RestartSec=20
 779 EOF
 780
 781     # sooo, there are a few ways to get traffic from the mail network
 782     # namespace to go over the wghole.
 783     #
 784     #1: unify the mail vpn and wghole
 785     # into 1 network.  this seems simple and logical, so I'm doing it.
 786     # One general downside is tying things together, if I need to mess
 787     # with one thing, it breaks the other. Oh well for now.
 788     #
 789     # 2. We can route 10.5.3.0/24 out of the mail nn and nat it into wghole.
 790     #
 791     # 3. We can setup the routing to happen on li, which seemed like I
 792     # just needed to add 10.8.0.4/24 to AllowedIPs in at least the
 793     # wghole clients, but I think that is kind of hacky and breaks ipv4
 794     # routing within the mailvpn, it happened to work just because exim
 795     # prefers ipv6 and that was also available in the mailvpn.
 796     #
 797     # 4. Put the hole interface into the mail network namespace. This
 798     # doesn't work if the mail vpn is wg.  For openvpn, it bypasses the
 799     # vpn routing and establishes a direct connection.  I only use the
 800     # hole vpn for randomish things, it should be fine to join the mail
 801     # nn for that. There should be some way to fix the routing issue
 802     # by doing manual routing, but that doesn't seem like a good use of time.
 803     # relevant:
 804     # https://www.wireguard.com/netns/#
 805     #
 806     # for wireguard debugging
 807     # echo module wireguard +p > /sys/kernel/debug/dynamic_debug/control
 808     # dmesg -w
 809
 810     ;;&
 811   $MAIL_HOST|bk)
 812     for unit in ${nn_progs[@]}; do
 813       u /etc/systemd/system/$unit.service.d/nn.conf <<EOF
 814 [Unit]
 815
 816 # Wants appears better than requires because with requires,
 817 # if the vpnser fails to start, this service won't get run at
 818 # all, even if the vpnser starts on an automatic restart.
 819
 820 Wants=$vpnser
 821 After=network.target mailnn.service $vpnser
 822 JoinsNamespaceOf=mailnn.service
 823 BindsTo=mailnn.service
 824 StartLimitIntervalSec=0
 825
 826 [Service]
 827 PrivateNetwork=true
 828 # note the nsswitch bind is actually not needed for bk, but
 829 # its the same file so it does no harm.
 830 BindPaths=$bindpaths
 831
 832 Restart=always
 833 RestartSec=20
 834 EOF
 835     done
 836     ;;
 837   *)
 838     for unit in exim4 spamassassin dovecot unbound; do
 839       f=/etc/systemd/system/$unit.service.d/nn.conf
 840       if [[ -s $f ]]; then
 841         rm -fv $f
 842         reload=true
 843       fi
 844     done
 845     ;;
 846 esac
 847
 848 # * wghole (another mail vpn)
 849
 850 if $bhost_t; then
 851   u /etc/systemd/system/wg-quick@wghole.service.d/override.conf <<'EOF'
 852 [Unit]
 853 StartLimitIntervalSec=0
 854
 855 [Service]
 856 Restart=on-failure
 857 RestartSec=20
 858 EOF
 859 fi
 860
 861 # * spamassassin config
 862 u /etc/sysctl.d/80-iank-mail.conf <<'EOF'
 863 # see exim spec
 864 net.netfilter.nf_conntrack_tcp_timeout_close_wait = 120
 865 EOF
 866 if $ur; then
 867   m sysctl -p
 868 fi
 869
 870 u /etc/spamassassin/mylocal.cf <<'EOF'
 871 # this is mylocal.cf because the normal local.cf has a bunch of upstream stuff i dont want to mess with
 872
 873
 874 # /usr/share/doc/exim4-base/README.Debian.gz:
 875 #   SpamAssassin's default report should not be used in a add_header
 876 #   statement since it contains empty lines. (This triggers e.g. Amavis'
 877 #   warning "BAD HEADER SECTION, Improper folded header field made up
 878 #   entirely of whitespace".) This is a safe, terse alternative:
 879 clear_report_template
 880 report (_SCORE_ / _REQD_ requ) _TESTSSCORES(,)_ autolearn=_AUTOLEARN
 881 uridnsbl_skip_domain iankelling.org
 882 uridnsbl_skip_domain amnimal.ninja
 883 uridnsbl_skip_domain expertpathologyreview.com
 884 uridnsbl_skip_domain zroe.org
 885 EOF
 886
 887 # 2020-10-19 remove old file. remove this when all hosts updated
 888 rm -fv /etc/systemd/system/spamddnsfix.{timer,service}
 889
 890 u /etc/default/spamassassin <<'EOF'
 891 # defaults plus debugging flags for an issue im having
 892 OPTIONS="--create-prefs --max-children 5 --helper-home-dir"
 893 PIDFILE="/var/run/spamd.pid"
 894 # my additions
 895 NICE="--nicelevel 15"
 896 CRON=1
 897 EOF
 898
 899 case $HOSTNAME in
 900   bk)
 901     u /etc/spamassassin/my_thishost.cf <<'EOF'
 902 # note: these are duplicated in exim config
 903 # veth0/1 # bk bk_ip6
 904 internal_networks 10.173.8.1/32 10.173.8.2/32 85.119.83.50/32 2001:ba8:1f1:f0c9::2
 905 trusted_networks 10.173.8.1/32 10.173.8.2/32 85.119.83.50/32 2001:ba8:1f1:f0c9::2
 906 EOF
 907
 908     ;;
 909   je)
 910     u /etc/spamassassin/my_thishost.cf <<'EOF'
 911 # note: these are duplicated in exim config
 912 # veth0/1 # je je_ipv6
 913 internal_networks 10.173.8.1/32 10.173.8.2/32 85.119.82.128/32 2001:ba8:1f1:f09d::2/128
 914 trusted_networks 10.173.8.1/32 10.173.8.2/32 85.119.82.128/32 2001:ba8:1f1:f09d::2/128
 915 EOF
 916     ;;
 917   *)
 918     u /etc/spamassassin/my_thishost.cf <<'EOF'
 919 # note: these are duplicated in exim config
 920 # veth0/1 # li li_ip6
 921 internal_networks 10.173.8.1/32 10.173.8.2/32 72.14.176.105/32 2600:3c00::f03c:91ff:fe6d:baf8/128
 922 trusted_networks 10.173.8.1/32 10.173.8.2/32 72.14.176.105/32 2600:3c00::f03c:91ff:fe6d:baf8/128
 923 EOF
 924     ;;
 925 esac
 926
 927 #####   end spamassassin config
 928
 929
 930 # * Update mail cert
 931
 932
 933 ## needed only for openvpn mail vpn.
 934 # if [[ -e /p/c/filesystem ]]; then
 935 #   # note, man openvpn implies we could just call mail-route on vpn startup/shutdown with
 936 #   # systemd, buuut it can remake the tun device unexpectedly, i got this in the log
 937 #   # after my internet was down for a bit:
 938 #   # NOTE: Pulled options changed on restart, will need to close and reopen TUN/TAP device.
 939 #   m /a/exe/vpn-mk-client-cert -b mailclient -n mail li.iankelling.org
 940 # fi
 941
 942 # With openvpn, I didn't get around to persisting the openvpn
 943 # cert/configs into /p/c/machine_specific/bk, so I had this case to
 944 # manually get the cert. However, we aren't using openvpn anymore, so it
 945 # is commented out.
 946 #
 947 # case $HOSTNAME in
 948 #   bk)
 949 #     if [[ ! -e /etc/openvpn/client/mail.conf ]]; then
 950 #       echo "$0: error: first, on a system with /p/c/filesystem, run mail-setup, or the vpn-mk-client-cert line above this err" 2>&2
 951 #       exit 1
 952 #     fi
 953 #     ;;
 954 # esac
 955
 956 m rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/mail-cert-cron /usr/local/bin
 957
 958 u /etc/systemd/system/mailcert.service <<'EOF'
 959 [Unit]
 960 Description=Mail cert rsync
 961 After=multi-user.target
 962
 963 [Service]
 964 Type=oneshot
 965 ExecStart=/usr/local/bin/sysd-mail-once mailcert /usr/local/bin/mail-cert-cron
 966 EOF
 967 u /etc/systemd/system/mailcert.timer <<'EOF'
 968 [Unit]
 969 Description=Run mail-cert once a day
 970
 971 [Timer]
 972 OnCalendar=daily
 973
 974 [Install]
 975 WantedBy=timers.target
 976 EOF
 977
 978
 979 wghost=${HOSTNAME}wg.b8.nz
 980 if $bhost_t && [[ ! -e /etc/exim4/certs/$wghost/privkey.pem ]]; then
 981   certbot -n --manual-public-ip-logging-ok --eff-email --agree-tos -m letsencrypt@iankelling.org \
 982           certonly --manual --preferred-challenges=dns \
 983           --manual-auth-hook /a/bin/ds/le-dns-challenge \
 984           --manual-cleanup-hook /a/bin/ds/le-dns-challenge-cleanup \
 985           --deploy-hook /a/bin/ds/le-exim-deploy -d $wghost
 986 fi
 987
 988 # * fail2ban
 989
 990 # todo: test that these configs actually work, eg run
 991 # s iptables-exim -S
 992 # and see someone is banned.
 993
 994 sed 's/^ *before *= *iptables-common.conf/before = iptables-common-exim.conf/' \
 995     /etc/fail2ban/action.d/iptables-multiport.conf| u /etc/fail2ban/action.d/iptables-exim.conf
 996 u /etc/fail2ban/action.d/iptables-common-exim.conf <<'EOF'
 997 # iank: same as iptables-common, except iptables is iptables-exim, ip6tables is ip6tables-exim
 998
 999 # Fail2Ban configuration file
1000 #
1001 # Author: Daniel Black
1002 #
1003 # This is a included configuration file and includes the definitions for the iptables
1004 # used in all iptables based actions by default.
1005 #
1006 # The user can override the defaults in iptables-common.local
1007 #
1008 # Modified: Alexander Koeppe <format_c@online.de>, Serg G. Brester <serg.brester@sebres.de>
1009 #       made config file IPv6 capable (see new section Init?family=inet6)
1010
1011 [INCLUDES]
1012
1013 after = iptables-blocktype.local
1014         iptables-common.local
1015 # iptables-blocktype.local is obsolete
1016
1017 [Definition]
1018
1019 # Option:  actionflush
1020 # Notes.:  command executed once to flush IPS, by shutdown (resp. by stop of the jail or this action)
1021 # Values:  CMD
1022 #
1023 actionflush = <iptables> -F f2b-<name>
1024
1025
1026 [Init]
1027
1028 # Option:  chain
1029 # Notes    specifies the iptables chain to which the Fail2Ban rules should be
1030 #          added
1031 # Values:  STRING  Default: INPUT
1032 chain = INPUT
1033
1034 # Default name of the chain
1035 #
1036 name = default
1037
1038 # Option:  port
1039 # Notes.:  specifies port to monitor
1040 # Values:  [ NUM | STRING ]  Default:
1041 #
1042 port = ssh
1043
1044 # Option:  protocol
1045 # Notes.:  internally used by config reader for interpolations.
1046 # Values:  [ tcp | udp | icmp | all ] Default: tcp
1047 #
1048 protocol = tcp
1049
1050 # Option:  blocktype
1051 # Note:    This is what the action does with rules. This can be any jump target
1052 #          as per the iptables man page (section 8). Common values are DROP
1053 #          REJECT, REJECT --reject-with icmp-port-unreachable
1054 # Values:  STRING
1055 blocktype = REJECT --reject-with icmp-port-unreachable
1056
1057 # Option:  returntype
1058 # Note:    This is the default rule on "actionstart". This should be RETURN
1059 #          in all (blocking) actions, except REJECT in allowing actions.
1060 # Values:  STRING
1061 returntype = RETURN
1062
1063 # Option:  lockingopt
1064 # Notes.:  Option was introduced to iptables to prevent multiple instances from
1065 #          running concurrently and causing irratic behavior.  -w was introduced
1066 #          in iptables 1.4.20, so might be absent on older systems
1067 #          See https://github.com/fail2ban/fail2ban/issues/1122
1068 # Values:  STRING
1069 lockingopt = -w
1070
1071 # Option:  iptables
1072 # Notes.:  Actual command to be executed, including common to all calls options
1073 # Values:  STRING
1074 iptables = /usr/local/bin/iptables-exim <lockingopt>
1075
1076
1077 [Init?family=inet6]
1078
1079 # Option:  blocktype (ipv6)
1080 # Note:    This is what the action does with rules. This can be any jump target
1081 #          as per the iptables man page (section 8). Common values are DROP
1082 #          REJECT, REJECT --reject-with icmp6-port-unreachable
1083 # Values:  STRING
1084 blocktype = REJECT --reject-with icmp6-port-unreachable
1085
1086 # Option:  iptables (ipv6)
1087 # Notes.:  Actual command to be executed, including common to all calls options
1088 # Values:  STRING
1089 iptables = /usr/local/bin/ip6tables-exim <lockingopt>
1090 EOF
1091
1092 u /etc/fail2ban/jail.d/exim.local <<'EOF'
1093 [exim]
1094 enabled  = true
1095 port     = 25,587
1096 filter   = exim
1097 banaction = iptables-exim
1098
1099 # 209.51.188.13 = mail.fsf.org
1100 # 2001:470:142::13 = mail.fsf.org
1101 # 209.51.188.92 = eggs.gnu.org
1102 # 2001:470:142:3::10 = eggs.gnu.org
1103 # 72.14.176.105 2600:3c00:e000:280::2 = mail.iankelling.org
1104 # 10.173.8.1 = non-nn net
1105 ignoreip = 209.51.188.13 2001:470:142::13 209.51.188.92 2001:470:142:3::10 72.14.176.105 2600:3c00:e000:280::2 10.173.8.1
1106 EOF
1107 if $ur; then
1108   m systemctl restart fail2ban
1109 fi
1110
1111 # * common exim4 config
1112
1113
1114 ## old, not using forward files anymore
1115 rm -fv $uhome/.forward /root/.forward
1116
1117
1118 # Make all system users be aliases. preventative
1119 # prevents things like cron mail for user without alias
1120 awk 'BEGIN { FS = ":" } ; $6 !~ /^\/home/ || $7 ~ /\/nologin$/  { print $1 }' /etc/passwd| while read -r user; do
1121   if [[ ! $user ]]; then
1122     continue
1123   fi
1124   if ! grep -q "^$user:" /etc/aliases; then
1125     echo "$user: root" |m tee -a /etc/aliases
1126   fi
1127 done
1128
1129
1130 awk 'BEGIN { FS = ":" } ; $6 ~ /^\/home/ && $7 !~ /\/nologin$/ { print $1 }' /etc/passwd| while read -r user; do
1131   case $HOSTNAME in
1132     $MAIL_HOST)
1133       sed -i "/^user:/d" /etc/aliases
1134       ;;
1135     *)
1136       if ! grep -q "^$user:" /etc/aliases; then
1137         echo "$user: root" |m tee -a /etc/aliases
1138       fi
1139       ;;
1140   esac
1141 done
1142
1143
1144 . /a/bin/bash_unpublished/priv-mail-setup
1145
1146
1147 m gpasswd -a iank adm #needed for reading logs
1148
1149 ### make local bounces go to normal maildir
1150 # local mail that bounces goes to /Maildir or /root/Maildir
1151 dirs=(/m/md/bounces/{cur,tmp,new})
1152 m mkdir -p ${dirs[@]}
1153 m chown iank:iank /m /m/md
1154 m ln -sfT /m/md /m/iank
1155 m chmod 771 /m /m/md
1156 m chown -R $u:Debian-exim /m/md/bounces
1157 m chmod 775 ${dirs[@]}
1158 m usermod -a -G Debian-exim $u
1159 for d in /Maildir /root/Maildir; do
1160   if [[ ! -L $d ]]; then
1161     m rm -rf $d
1162   fi
1163   m ln -sf -T /m/md/bounces $d
1164 done
1165
1166 # dkim, client passwd file
1167 files=(/p/c/machine_specific/$HOSTNAME/filesystem/etc/exim4/*)
1168 f=/p/c/filesystem/etc/exim4/passwd.client
1169 if [[ -e $f ]]; then
1170   files+=($f)
1171 fi
1172 if (( ${#files[@]} )); then
1173   m rsync -ahhi --chown=root:Debian-exim --chmod=0640 \
1174     ${files[@]} /etc/exim4
1175 fi
1176
1177 # By default, only 10 days of logs are kept. increase that.
1178 # And dont compress, I look back at logs too often and
1179 # dont need the annoyance of decompressing them all the time.
1180 m sed -ri '/^\s*compress\s*$/d;s/^(\s*rotate\s).*/\11000/' /etc/logrotate.d/exim4-base
1181 files=(/var/log/exim4/*.gz)
1182 if (( ${#files[@]} )); then
1183   gunzip ${files[@]}
1184 fi
1185
1186 ## disabled. not using .forward files, but this is still interesting
1187 ## for reference.
1188 # ## https://blog.dhampir.no/content/make-exim4-on-debian-respect-forward-and-etcaliases-when-using-a-smarthost
1189 # # i only need .forwards, so just doing that one.
1190 # cd /etc/exim4/conf.d/router
1191 # b=userforward_higher_priority
1192 # # replace the router name so it is unique
1193 # sed -r s/^\\S+:/$b:/ 600_exim4-config_userforward >175_$b
1194 rm -fv /etc/exim4/conf.d/router/175_userforward_higher_priority
1195
1196 # todo, consider 'separate' in etc/exim4.conf, could it help on busy systems?
1197
1198 # alerts is basically the postmaster address
1199 m sed -i --follow-symlinks -f - /etc/aliases <<EOF
1200 \$a root: alerts@iankelling.org
1201 /^root:/d
1202 EOF
1203
1204 cat >/etc/exim4/conf.d/rewrite/34_iank_rewriting <<'EOF'
1205 ncsoft@zroe.org graceq2323@gmail.com hE
1206 EOF
1207
1208 # old name
1209 rm -fv /etc/exim4/conf.d/retry/37_retry
1210
1211 cat >/etc/exim4/conf.d/retry/17_retry <<'EOF'
1212 # Retry fast for my own domains
1213 iankelling.org * F,1d,1m;F,14d,1h
1214 amnimal.ninja * F,1d,1m;F,14d,1h
1215 expertpathologyreview.com * F,1d,1m;F,14d,1h
1216 je.b8.nz * F,1d,1m;F,14d,1h
1217 zroe.org * F,1d,1m;F,14d,1h
1218 eximbackup.b8.nz * F,1d,1m;F,14d,1h
1219
1220 # The spec says the target domain will be used for temporary host errors,
1221 # but i've found that isn't correct, the hostname is required
1222 # at least sometimes.
1223 nn.b8.nz * F,1d,1m;F,14d,1h
1224 defaultnn.b8.nz * F,1d,1m;F,14d,1h
1225 mx.iankelling.org * F,1d,1m;F,14d,1h
1226 bk.b8.nz * F,1d,1m;F,14d,1h
1227 eggs.gnu.org * F,1d,1m;F,14d,1h
1228 fencepost.gnu.org * F,1d,1m;F,14d,1h
1229
1230 # afaik our retry doesnt need this, but just using everything
1231 mx.amnimal.ninja * F,1d,1m;F,14d,1h
1232 mx.expertpathologyreview.com * F,1d,1m;F,14d,1h
1233
1234
1235 mail.fsf.org * F,1d,15m;F,14d,1h
1236 EOF
1237
1238
1239 rm -vf /etc/exim4/conf.d/main/000_localmacros # old filename
1240
1241 # separate file so without quoted EOF for convenience
1242 cat >/etc/exim4/conf.d/main/000_local2 <<EOF
1243 # normally empty, I set this so I can set the envelope address
1244 # when doing mail redelivery to invoke filters. Also allows
1245 # me exiqgrep and stuff.
1246 MAIN_TRUSTED_GROUPS = $u
1247 EOF
1248
1249 cd /etc/exim4
1250 {
1251   for f in *-private.pem; do
1252     echo ${f%-private.pem}
1253   done
1254 } | u /etc/exim4/conf.d/my-dkim-domains
1255
1256 rm -f /etc/exim4/conf.d/transport/11_iank
1257
1258 cat >/etc/exim4/conf.d/main/000_local <<'EOF'
1259 MAIN_TLS_ENABLE = true
1260
1261 # require tls connections for all smarthosts
1262 REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS = ! nn.b8.nz
1263 REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS = nn.b8.nz
1264
1265 # debian exim config added this in 2016 or so?
1266 # it's part of the smtp spec, to limit lines to 998 chars
1267 # but a fair amount of legit mail does not adhere to it. I don't think
1268 # this should be default, like it says in
1269 # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=828801
1270 # todo: the bug for introducing this was about headers, but
1271 # the fix maybe is for all lines? one says gmail rejects, the
1272 # other says gmail does not reject. figure out and open a new bug.
1273 IGNORE_SMTP_LINE_LENGTH_LIMIT = true
1274
1275 # more verbose logs. used to use +all, but made it less for more efficiency.
1276 MAIN_LOG_SELECTOR = -skip_delivery -tls_cipher -tls_certificate_verified +all_parents +address_rewrite +arguments +deliver_time +pid +queue_time +queue_time_overall +received_recipients +received_sender +return_path_on_delivery +sender_on_delivery +smtp_confirmation +subject
1277
1278 # Based on spec, seems like a good idea to be nice.
1279 smtp_return_error_details = true
1280
1281 # default is 10. when exim has been down for a bit, fsf mailserver
1282 # will do a big send in one connection, then exim decides to put
1283 # the messages in the queue instead of delivering them, to avoid
1284 # spawning too many delivery processes. This is the same as the
1285 # fsfs value. And the corresponding one for how many messages
1286 # to send out in 1 connection remote_max_parallel = 256
1287 smtp_accept_queue_per_connection = 500
1288
1289
1290 DKIM_CANON = relaxed
1291 DKIM_SELECTOR = li
1292
1293
1294 # The file is based on the outgoing domain-name in the from-header.
1295 # sign if key exists
1296 DKIM_PRIVATE_KEY = ${if exists{/etc/exim4/${dkim_domain}-private.pem} {/etc/exim4/${dkim_domain}-private.pem}}
1297
1298 # most of the ones that gmail seems to use.
1299 # Exim has horrible default of signing unincluded
1300 # list- headers since they got mentioned in an
1301 # rfc, but this messes up mailing lists, like gnu/debian which want to
1302 # keep your dkim signature intact but add list- headers.
1303 DKIM_SIGN_HEADERS = mime-version:in-reply-to:references:from:date:subject:to
1304
1305 domainlist local_hostnames = ! je.b8.nz : ! bk.b8.nz : *.b8.nz : b8.nz
1306
1307 # note: most of these are duplicated in spamassassin config
1308 hostlist iank_trusted = <; \
1309 # veth0
1310 10.173.8.1 ; \
1311 # li li_ip6
1312 72.14.176.105 ; 2600:3c00::f03c:91ff:fe6d:baf8 ; \
1313 # li_vpn_net li_vpn_net_ip6s
1314 10.8.0.0/24; 2600:3c00:e000:280::/64 ; 2600:3c00:e002:3800::/56 ;  \
1315 # bk bk_ip6
1316 85.119.83.50 ; 2001:ba8:1f1:f0c9::2 ; \
1317 # je je_ipv6
1318 85.119.82.128 ; 2001:ba8:1f1:f09d::2 ; \
1319 # fsf_mit_net fsf_mit_net_ip6 fsf_net fsf_net_ip6 fsf_office_net
1320 18.4.89.0/24 ; 2603:3005:71a:2e00::/64 ; 209.51.188.0/24 ; 2001:470:142::/48 ; 74.94.156.208/28
1321
1322
1323 # this is the default delay_warning_condition, plus matching on local_domains.
1324 # If I have some problem with my local system that causes delayed delivery,
1325 # I dont want to send warnings out to non-local domains.
1326 delay_warning_condition = ${if or {\
1327   { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} }\
1328   { match{$h_precedence:}{(?i)bulk|list|junk} }\
1329   { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} }\
1330   { match_domain{$domain}{+local_domains} }\
1331   } {no}{yes}}
1332
1333
1334 # enable 587 in addition to the default 25, so that
1335 # i can send mail where port 25 is firewalled by isp
1336 daemon_smtp_ports = 25 : 587 : 10025
1337 # default of 25, can get stuck when catching up on mail
1338 smtp_accept_max = 400
1339 smtp_accept_reserve = 100
1340 smtp_reserve_hosts = +iank_trusted
1341
1342 # Rules that make receiving more liberal should be on backup hosts
1343 # so that we dont reject mail accepted by MAIL_HOST
1344 LOCAL_DENY_EXCEPTIONS_LOCAL_ACL_FILE = /etc/exim4/conf.d/local_deny_exceptions_acl
1345
1346 acl_not_smtp = acl_check_not_smtp
1347 EOF
1348
1349 if dpkg --compare-versions "$(dpkg-query -f='${Version}\n' --show exim4)" ge 4.94; then
1350   cat >>/etc/exim4/conf.d/main/000_local <<'EOF'
1351 # In t11, we cant do the old anymore because this is tainted data used in a file lookup.
1352 # /usr/share/doc/exim4/NEWS.Debian.gz suggests to use lookups to untaint data.
1353 DKIM_DOMAIN = ${lookup {${domain:$rh_from:}}lsearch,ret=key{/etc/exim4/conf.d/my-dkim-domains}}
1354 EOF
1355 else
1356   cat >>/etc/exim4/conf.d/main/000_local <<'EOF'
1357 # From comments in
1358 # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
1359 # and its best for this to align https://tools.ietf.org/html/rfc7489#page-8
1360 # There could be some circumstance when the
1361 # from: isnt our domain, but the envelope sender is
1362 # and so still want to sign, but I cant think of any case.
1363 DKIM_DOMAIN = ${lc:${domain:$rh_from:}}
1364 EOF
1365 fi
1366
1367 cat >/etc/exim4/conf.d/main/30_local <<EOF
1368 freeze_tell =
1369 EOF
1370
1371
1372 rm -fv /etc/exim4/rcpt_local_acl # old path
1373
1374 u /etc/exim4/conf.d/local_deny_exceptions_acl <<'EOF'
1375 # This acl already exists in rcpt, this just makes it more widespread.
1376 # See the comment there for its rationale. The reason it needs to be
1377 # more widespread is that I've turned on sender verification, but cron
1378 # emails can fail sender verification since I may be in a network that
1379 # doesn't have my local dns.
1380 accept
1381   authenticated = *
1382
1383 # i setup a local programs smtp to mail.iankelling.org, this
1384 # skips sender verification for it.
1385 accept
1386   hosts = 10.173.8.1
1387 EOF
1388
1389 rm -fv /etc/exim4/data_local_acl # old path
1390
1391 u /etc/exim4/conf.d/data_local_acl <<'EOF'
1392 # Except for the "condition =", this was
1393 # a comment in the check_data acl. The comment about this not
1394 # being suitable has been changed in newer exim versions. The only thing
1395 # related I found was to
1396 # add the condition =, cuz spamassassin has problems with big
1397 # messages and spammers don't bother with big messages,
1398 # but I've increased the size from 10k
1399 # suggested in official docs, and 100k in the wiki example because
1400 # those docs are rather old and I see a 110k spam message
1401 # pretty quickly looking through my spam folder.
1402
1403 warn
1404   !hosts = +iank_trusted
1405   remove_header = X-Spam_score: X-Spam_score_int : X-Spam_bar : X-Spam_report
1406
1407 warn
1408   !hosts = +iank_trusted
1409   # Smarthosts connect with residential ips and thus get flagged as spam if we do a spam check.
1410   !authenticated = plain_server:login_server
1411   condition = ${if < {$message_size}{5000K}}
1412   spam = Debian-exim:true
1413   add_header = X-Spam_score_int: $spam_score_int
1414   add_header = X-Spam_score: $spam_score
1415   add_header = X-Spam_bar: $spam_bar
1416   add_header = X-Spam_report: $spam_report
1417   add_header = X-Spam_action: $spam_action
1418
1419
1420 #accept
1421 #  spf = pass:fail:softfail:none:neutral:permerror:temperror
1422 #  dmarc_status = reject:quarantine
1423 #  add_header = Reply-to: dmarctest@iankelling.org
1424
1425 # This allows us to delay sending an email until a specific time,
1426 # allowing us time to change our mind and also to appear to have
1427 # sent the message at a different time. In emacs copy the
1428 # automcatically date header add an f to make it fdate,
1429 # and then change the date to whenever you want to send it.
1430 # In the system-status script, I check once per minute
1431 # or more if it should be sent.
1432
1433 warn
1434   # fdate = future date.
1435   condition = ${if def:h_fdate:}
1436   remove_header = fdate:
1437   remove_header = date:
1438   add_header = date: $h_fdate
1439   control = freeze
1440 EOF
1441 sed -i 's/^freeze_tell =.*/#\0/' /etc/exim4/conf.d/main/02_exim4-config_options
1442
1443 u /etc/exim4/conf.d/acl/41_check_not_smtp <<'EOF'
1444 # todo: for non MAIL_HOST machines, i'd like
1445 # to send to the MAIL_HOST without freezing.
1446 # So, only do this if we are MAIL_HOST.
1447
1448 acl_check_not_smtp:
1449 warn
1450   # fdate = future date.
1451   condition = ${if def:h_fdate:}
1452   remove_header = fdate:
1453   remove_header = date:
1454   add_header = Date: $h_fdate
1455   control = freeze
1456 accept
1457 EOF
1458
1459
1460 # old file
1461 rm -fv /etc/exim4/conf.d/router/8{8,9}0_backup_copy \
1462    /etc/exim4/conf.d/router/865_backup_redir \
1463    /etc/exim4/conf.d/router/870_backup_local
1464
1465 # It is important for this to exist everywhere except in MAIL_HOST
1466 # non-nn config. Previously, just had it in the nn-config on MAIL_HOST,
1467 # but that is a problem if we change mail host and still have something
1468 # in the queue which was destined for this router, but hosts were
1469 # unreachable, the routers will be reevaluated on the next retry.
1470 u /etc/exim4/conf.d/router/170_backup_copy <<EOF
1471 ### router/900_exim4-config_local_user
1472 #################################
1473
1474 backup_copy:
1475 driver = manualroute
1476 domains = eximbackup.b8.nz
1477 transport = backup_remote
1478 ignore_target_hosts = ${HOSTNAME}wg.b8.nz
1479 # note changes here also require change in passwd.client
1480 route_list = * eximbackup.b8.nz
1481 same_domain_copy_routing = yes
1482 errors_to = alerts@iankelling.org
1483 no_more
1484 EOF
1485
1486
1487 # exim4-config transports are the same as default except for
1488 # message_linelength_limit = 2097152
1489 #
1490 # TODO: copy the defaults into their own file, and setup a cronjob so
1491 # that if file.dpkg-dist shows up, and it is different, we get an alert.
1492
1493 u /etc/exim4/conf.d/transport/30_exim4-config_remote_smtp_smarthost <<'EOF'
1494 ### transport/30_exim4-config_remote_smtp_smarthost
1495 #################################
1496
1497 # This transport is used for delivering messages over SMTP connections
1498 # to a smarthost. The local host tries to authenticate.
1499 # This transport is used for smarthost and satellite configurations.
1500
1501 remote_smtp_smarthost:
1502   debug_print = "T: remote_smtp_smarthost for $local_part@$domain"
1503   driver = smtp
1504   message_linelength_limit = 2097152
1505   multi_domain
1506   hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \
1507         {\
1508         ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\
1509         }\
1510         {} \
1511       }
1512 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1513   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1514 .endif
1515 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1516   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1517 .endif
1518 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1519   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1520 .endif
1521 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1522   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1523 .endif
1524 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1525   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1526 .endif
1527 .ifdef REMOTE_SMTP_RETURN_PATH
1528   return_path = REMOTE_SMTP_RETURN_PATH
1529 .endif
1530 .ifdef REMOTE_SMTP_HELO_DATA
1531   helo_data=REMOTE_SMTP_HELO_DATA
1532 .endif
1533 .ifdef TLS_DH_MIN_BITS
1534 tls_dh_min_bits = TLS_DH_MIN_BITS
1535 .endif
1536 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1537 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1538 .endif
1539 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1540 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1541 .endif
1542 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1543   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1544 .endif
1545 .ifdef REMOTE_SMTP_SMARTHOST_PROTOCOL
1546   protocol = REMOTE_SMTP_SMARTHOST_PROTOCOL
1547 .endif
1548 EOF
1549
1550 u /etc/exim4/conf.d/transport/30_exim4-config_remote_smtp <<'EOF'
1551 ### transport/30_exim4-config_remote_smtp
1552 #################################
1553 # This transport is used for delivering messages over SMTP connections.
1554
1555 remote_smtp:
1556   debug_print = "T: remote_smtp for $local_part@$domain"
1557   driver = smtp
1558   message_linelength_limit = 2097152
1559 .ifdef REMOTE_SMTP_HOSTS_AVOID_TLS
1560   hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
1561 .endif
1562 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1563   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1564 .endif
1565 .ifdef REMOTE_SMTP_RETURN_PATH
1566   return_path = REMOTE_SMTP_RETURN_PATH
1567 .endif
1568 .ifdef REMOTE_SMTP_HELO_DATA
1569   helo_data=REMOTE_SMTP_HELO_DATA
1570 .endif
1571 .ifdef REMOTE_SMTP_INTERFACE
1572   interface = REMOTE_SMTP_INTERFACE
1573 .endif
1574 .ifdef DKIM_DOMAIN
1575 dkim_domain = DKIM_DOMAIN
1576 .endif
1577 .ifdef DKIM_IDENTITY
1578 dkim_identity = DKIM_IDENTITY
1579 .endif
1580 .ifdef DKIM_SELECTOR
1581 dkim_selector = DKIM_SELECTOR
1582 .endif
1583 .ifdef DKIM_PRIVATE_KEY
1584 dkim_private_key = DKIM_PRIVATE_KEY
1585 .endif
1586 .ifdef DKIM_CANON
1587 dkim_canon = DKIM_CANON
1588 .endif
1589 .ifdef DKIM_STRICT
1590 dkim_strict = DKIM_STRICT
1591 .endif
1592 .ifdef DKIM_SIGN_HEADERS
1593 dkim_sign_headers = DKIM_SIGN_HEADERS
1594 .endif
1595 .ifdef DKIM_TIMESTAMPS
1596 dkim_timestamps = DKIM_TIMESTAMPS
1597 .endif
1598 .ifdef TLS_DH_MIN_BITS
1599 tls_dh_min_bits = TLS_DH_MIN_BITS
1600 .endif
1601 .ifdef REMOTE_SMTP_TLS_CERTIFICATE
1602 tls_certificate = REMOTE_SMTP_TLS_CERTIFICATE
1603 .endif
1604 .ifdef REMOTE_SMTP_PRIVATEKEY
1605 tls_privatekey = REMOTE_SMTP_PRIVATEKEY
1606 .endif
1607 .ifdef REMOTE_SMTP_HOSTS_REQUIRE_TLS
1608   hosts_require_tls = REMOTE_SMTP_HOSTS_REQUIRE_TLS
1609 .endif
1610 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1611   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1612 .endif
1613
1614 EOF
1615
1616 u /etc/exim4/conf.d/transport/30_backup_remote <<'EOF'
1617 backup_remote:
1618   driver = smtp
1619   multi_domain
1620   message_linelength_limit = 2097152
1621   hosts_require_auth = *
1622   hosts_try_auth = *
1623   envelope_to_add
1624   # manual return path because we want it to be the envelope sender
1625   # we got not the one we are using in this smtp transport
1626   headers_add = "Return-path: $sender_address"
1627 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1628   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1629 .endif
1630 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1631   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1632 .endif
1633 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1634   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1635 .endif
1636 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1637   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
1638 .endif
1639 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1640   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1641 .endif
1642 .ifdef REMOTE_SMTP_HELO_DATA
1643   helo_data=REMOTE_SMTP_HELO_DATA
1644 .endif
1645 .ifdef TLS_DH_MIN_BITS
1646 tls_dh_min_bits = TLS_DH_MIN_BITS
1647 .endif
1648 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1649 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1650 .endif
1651 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1652 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1653 .endif
1654 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1655   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1656 .endif
1657 EOF
1658
1659 u /etc/exim4/conf.d/router/900_exim4-config_local_user <<'EOF'
1660 ### router/900_exim4-config_local_user
1661 #################################
1662
1663 # This router matches local user mailboxes. If the router fails, the error
1664 # message is "Unknown user".
1665 local_user:
1666   debug_print = "R: local_user for $local_part@$domain"
1667   driver = accept
1668   domains = +local_domains
1669 # ian: default file except where mentioned.
1670 # ian: commented this. I get all local parts. for bk, an rcpt
1671 # check handles checking with dovecot, and the only router
1672 # after this is root.
1673 #  local_parts = ! root
1674   transport = LOCAL_DELIVERY
1675   cannot_route_message = Unknown user
1676 # ian: added for + addressing.
1677   local_part_suffix = +*
1678   local_part_suffix_optional
1679 EOF
1680 u /etc/exim4/conf.d/transport/30_exim4-config_dovecot_lmtp <<'EOF'
1681 dovecot_lmtp:
1682   driver = lmtp
1683   socket = /var/run/dovecot/lmtp
1684   #maximum number of deliveries per batch, default 1
1685   batch_max = 200
1686   envelope_to_add
1687 EOF
1688
1689 u /etc/exim4/conf.d/transport/30_remote_smtp_vpn <<'EOF'
1690 # same as debians 30_exim4-config_remote_smtp, but
1691 # with interface added at the end.
1692
1693 remote_smtp_vpn:
1694   debug_print = "T: remote_smtp_vpn for $local_part@$domain"
1695   driver = smtp
1696   message_linelength_limit = 2097152
1697 .ifdef REMOTE_SMTP_HOSTS_AVOID_TLS
1698   hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
1699 .endif
1700 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1701   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1702 .endif
1703 .ifdef REMOTE_SMTP_RETURN_PATH
1704   return_path = REMOTE_SMTP_RETURN_PATH
1705 .endif
1706 .ifdef REMOTE_SMTP_HELO_DATA
1707   helo_data=REMOTE_SMTP_HELO_DATA
1708 .endif
1709 .ifdef DKIM_DOMAIN
1710 dkim_domain = DKIM_DOMAIN
1711 .endif
1712 .ifdef DKIM_SELECTOR
1713 dkim_selector = DKIM_SELECTOR
1714 .endif
1715 .ifdef DKIM_PRIVATE_KEY
1716 dkim_private_key = DKIM_PRIVATE_KEY
1717 .endif
1718 .ifdef DKIM_CANON
1719 dkim_canon = DKIM_CANON
1720 .endif
1721 .ifdef DKIM_STRICT
1722 dkim_strict = DKIM_STRICT
1723 .endif
1724 .ifdef DKIM_SIGN_HEADERS
1725 dkim_sign_headers = DKIM_SIGN_HEADERS
1726 .endif
1727 .ifdef TLS_DH_MIN_BITS
1728 tls_dh_min_bits = TLS_DH_MIN_BITS
1729 .endif
1730 .ifdef REMOTE_SMTP_TLS_CERTIFICATE
1731 tls_certificate = REMOTE_SMTP_TLS_CERTIFICATE
1732 .endif
1733 .ifdef REMOTE_SMTP_PRIVATEKEY
1734 tls_privatekey = REMOTE_SMTP_PRIVATEKEY
1735 .endif
1736 .ifdef REMOTE_SMTP_HOSTS_REQUIRE_TLS
1737   hosts_require_tls = REMOTE_SMTP_HOSTS_REQUIRE_TLS
1738 .endif
1739 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1740   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1741 .endif
1742   interface = <; 10.8.0.4 ; 2600:3c00:e002:3800::4
1743 EOF
1744
1745 u /etc/exim4/conf.d/transport/30_smarthost_dkim <<'EOF'
1746 # ian: this is remote_smtp_smarthost plus the dkim parts from remote_smtp
1747
1748 smarthost_dkim:
1749   debug_print = "T: remote_smtp_smarthost for $local_part@$domain"
1750   driver = smtp
1751   message_linelength_limit = 2097152
1752   multi_domain
1753   hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \
1754         {\
1755         ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\
1756         }\
1757         {} \
1758       }
1759 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1760   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1761 .endif
1762 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1763   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1764 .endif
1765 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1766   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1767 .endif
1768 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1769   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
1770 .endif
1771 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1772   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1773 .endif
1774 .ifdef REMOTE_SMTP_RETURN_PATH
1775   return_path = REMOTE_SMTP_RETURN_PATH
1776 .endif
1777 .ifdef REMOTE_SMTP_HELO_DATA
1778   helo_data=REMOTE_SMTP_HELO_DATA
1779 .endif
1780 .ifdef TLS_DH_MIN_BITS
1781 tls_dh_min_bits = TLS_DH_MIN_BITS
1782 .endif
1783 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1784 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1785 .endif
1786 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1787 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1788 .endif
1789 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1790   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1791 .endif
1792 .ifdef DKIM_DOMAIN
1793 dkim_domain = DKIM_DOMAIN
1794 .endif
1795 .ifdef DKIM_SELECTOR
1796 dkim_selector = DKIM_SELECTOR
1797 .endif
1798 .ifdef DKIM_PRIVATE_KEY
1799 dkim_private_key = DKIM_PRIVATE_KEY
1800 .endif
1801 .ifdef DKIM_CANON
1802 dkim_canon = DKIM_CANON
1803 .endif
1804 .ifdef DKIM_STRICT
1805 dkim_strict = DKIM_STRICT
1806 .endif
1807 .ifdef DKIM_SIGN_HEADERS
1808 dkim_sign_headers = DKIM_SIGN_HEADERS
1809 .endif
1810 EOF
1811
1812
1813 cat >/etc/exim4/update-exim4.conf.conf  <<'EOF'
1814 # default stuff, i havent checked if its needed
1815 dc_minimaldns='false'
1816 CFILEMODE='644'
1817 dc_use_split_config='true'
1818 dc_mailname_in_oh='true'
1819 EOF
1820
1821
1822 # * radicale
1823 if mailhost; then
1824   if ! mountpoint /o; then
1825     echo "error /o is not a mountpoint" >&2
1826     exit 1
1827   fi
1828
1829   # davx/davdroid setup instructions at the bottom
1830
1831   # main docs:
1832   # http://radicale.org/user_documentation/
1833   # https://davdroid.bitfire.at/configuration/
1834
1835   # note on debugging: if radicale can't bind to the address,
1836   # in the log it just says "Starting Radicale". If you run
1837   # it in the foreground, it will give more info. Background
1838   # plus debug does not help.
1839   # sudo -u radicale radicale -D
1840
1841   # created password file with:
1842   # htpasswd -c /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1843   # chmod 640 /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1844   # # setup chgrp www-data in ./conflink
1845
1846   pi-nostart radicale
1847   m usermod -a -G radicale iank
1848
1849   u /etc/systemd/system/radicale.service.d/override.conf <<EOF
1850 [Unit]
1851
1852 After=network.target network-online.target mailnn.service $vpnser
1853
1854 Wants=$vpnser
1855 JoinsNamespaceOf=mailnn.service
1856 StartLimitIntervalSec=0
1857
1858 [Service]
1859 PrivateNetwork=true
1860 BindPaths=$bindpaths
1861 Restart=always
1862 # time to sleep before restarting a service
1863 RestartSec=20
1864
1865 [Install]
1866 # for openvpn
1867 RequiredBy=$vpnser
1868 EOF
1869
1870
1871   # use persistent uid/gid
1872   IFS=:; read -r _ _ uid _ < <(getent passwd radicale ); unset IFS
1873   IFS=:; read -r _ _ gid _ < <(getent group radicale ); unset IFS
1874   if [[ $uid != 609 ]]; then
1875     m systemctl stop radicale ||:
1876     m usermod -u 609 radicale
1877     m groupmod -g 609 radicale
1878     m usermod -g 609 radicale
1879   fi
1880   m find /o/radicale  -xdev -exec chown -h 609 {} +
1881   m find /o/radicale -xdev -exec chgrp -h 609 {} +
1882
1883
1884   # I moved /var/lib/radicale after it's initialization.
1885   # I did a sudo -u radicale git init in the collections subfolder
1886   # after it gets created, per the git docs.
1887   m /a/exe/lnf -T /o/radicale /var/lib/radicale
1888
1889   # from https://www.williamjbowman.com/blog/2015/07/24/setting-up-webdav-caldav-and-carddav-servers/
1890
1891   # more config is for li in distro-end
1892
1893   # coment in this file says this is needed for it to run on startup
1894   sed -ri 's/^\s*#+\s*(ENABLE_RADICALE\s*=\s*yes\s*)/\1/' /etc/default/radicale
1895
1896   # comments say default is 0.0.0.0:5232
1897   m setini hosts 10.8.0.4:5232 server
1898   # https://radicale.org/2.1.html
1899   m setini type http_x_remote_user auth
1900
1901
1902   # disable power management feature, set to 240 min sync interval,
1903   # so it shouldn't be bad.
1904
1905   # davx^5 from f-droid
1906   # login with url and user name
1907   # url https://cal.iankelling.org/ian
1908   # username ian
1909   # pass, see password manager for radicale
1910   #
1911   # add account dialog:
1912   #
1913   # set account name as ian@iankelling.org, per help text below the
1914   # field.
1915   #
1916   # switch to groups are per-contact categories,
1917   # per https://davdroid.bitfire.at/configuration/radicale/
1918   #
1919   #
1920   # After setting up account, I added one address book, named
1921   # ianaddr. calender was already created, named ian. checked boxes under
1922   # both. synced.
1923   #
1924   # To restore from old phone to new phone, I wiped all data out, then copied over the newly created files. I think
1925   #
1926   # ignorable background info:
1927   #
1928   # opentasks uses the calendar file.
1929   #
1930   # The address book I created got a uuid as a name for the file. Note
1931   # the .props file says if it's a calendar or addressbook.
1932   #
1933   # When debugging, tailed /var/log/radicale/radicale.log and apache log,
1934   # both show the requests happening. Without creating the address book,
1935   # after creating a contact, a sync would delete it.
1936   #
1937   # Address books correspond to .props files in the radicale dir.
1938   #
1939   #  Some background is here,
1940   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1941   # which shows separate vcard option is from rfc 6350, the other is 2426,
1942   # radicale page says it implements the former not the latter,
1943   # which conflicts with the documentation of which to select, but whatever.
1944   # http://radicale.org/technical_choices/
1945   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1946   #
1947   # Note, url above says only cayanogenmod 13+ and omnirom can manage groups.
1948
1949   # Note, radicale had built-in git support to track changes, but they
1950   # removed it in 2.0.
1951
1952 fi
1953
1954 # * dovecot
1955
1956 # ** $MAIL_HOST|bk|je)
1957 case $HOSTNAME in
1958   $MAIL_HOST|bk|je)
1959     # based on a little google and package search, just the dovecot
1960     # packages we need instead of dovecot-common.
1961     #
1962     # dovecot-lmtpd is for exim to deliver to dovecot instead of maildir
1963     # directly.  The reason to do this is to use dovecot\'s sieve, which
1964     # can generally do more than exims filters (a few things less) and
1965     # sieve has the benefit of being supported in postfix and
1966     # proprietary/weird environments, so there is more examples on the
1967     # internet.
1968     pi-nostart dovecot-core dovecot-imapd dovecot-sieve dovecot-lmtpd dovecot-sqlite sqlite3
1969
1970     for f in /p/c{/machine_specific/$HOSTNAME,}/filesystem/etc/dovecot/users; do
1971       if [[ -e $f ]]; then
1972         m rsync -ahhi --chown=root:dovecot --chmod=0640 $f /etc/dovecot/
1973         break
1974       fi
1975     done
1976     for f in /p/c/subdir_files/sieve/*sieve /a/bin/ds/subdir_files/sieve/*sieve; do
1977       m sudo -u $u /a/exe/lnf -v -T $f $uhome/sieve/${f##*/}
1978     done
1979
1980     # https://wiki.dovecot.org/SSL/DovecotConfiguration
1981     u /etc/dovecot/dhparam <<'EOF'
1982 -----BEGIN DH PARAMETERS-----
1983 MIIBCAKCAQEAoleil6SBxGqQKk7j0y2vV3Oklv6XupZKn7PkPv485QuFeFagifeS
1984 A+Jz6Wquqk5zhGyCu63Hp4wzGs4TyQqoLjkaWL6Ra/Bw3g3ofPEzMGEsV1Qdqde4
1985 jorwiwtr2i9E6TXQp0noT/7VFeHulIkayTeW8JulINdMHs+oLylv16McGCIrxbkM
1986 8D1PuO0TP/CNDs2QbRvJ1RjY3CeGpxMhrSHVgBCUMwnA2cvz3bYjI7UMYMMDPNrE
1987 PLrwsYzXGGCdJsO2vsmmqqgLsZiapYJlUNjfiyWLt7E2H6WzkNB3VIhIPfLqFDPK
1988 xioE3sYKdjOt+p6mlg3l8+OLtODEFPHDqwIBAg==
1989 -----END DH PARAMETERS-----
1990 EOF
1991     {
1992
1993       if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
1994         cat <<'EOF'
1995 ssl_cert = </etc/exim4/fullchain.pem
1996 ssl_key = </etc/exim4/privkey.pem
1997 EOF
1998       else
1999         # We have a lets encrypt hooks that puts things here.
2000         # This is just for bk, which uses the vpn cert in exim
2001         # for sending mail, but the local hostname cert for
2002         # dovecot.
2003         cat <<'EOF'
2004 ssl_cert = </etc/exim4/exim.crt
2005 ssl_key = </etc/exim4/exim.key
2006 EOF
2007       fi
2008
2009       cat <<'EOF'
2010 # https://ssl-config.mozilla.org
2011 ssl = required
2012 # this is the same as the certbot list, i check changes in /a/bin/ds/filesystem/usr/local/bin/check-lets-encrypt-ssl-settings
2013 ssl_cipher_list = ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
2014 ssl_protocols = TLSv1.2
2015 ssl_prefer_server_ciphers = no
2016
2017 protocol lmtp {
2018 #per https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
2019 # default is just $mail_plugins
2020   mail_plugins = $mail_plugins sieve
2021 }
2022 EOF
2023       if dpkg --compare-versions "$(dpkg-query -f='${Version}\n' --show dovecot-core)" ge 1:2.3; then
2024         cat <<EOF
2025 ssl_dh = </etc/dovecot/dhparam
2026 EOF
2027       fi
2028     } >/etc/dovecot/local.conf
2029
2030     ;;&
2031
2032   # **  $MAIL_HOST)
2033   $MAIL_HOST)
2034     # If we changed 90-sieve.conf and removed the active part of the
2035     # sieve option, we wouldn\'t need this, but I\'d rather not modify a
2036     # default config if not needed. This won\'t work as a symlink in /a/c
2037     # unfortunately.
2038     m sudo -u $u /a/exe/lnf -T sieve/main.sieve $uhome/.dovecot.sieve
2039
2040     if [[ ! -e $uhome/sieve/personal.sieve ]]; then
2041       m touch $uhome/sieve/personal{,end}{,test}.sieve
2042     fi
2043
2044     rm -fv /etc/dovecot/conf.d/20-lmtp.conf # file from prev version
2045     cat >>/etc/dovecot/local.conf <<EOF
2046 # simple password file based login
2047 !include conf.d/auth-passwdfile.conf.ext
2048
2049 # ian: %u is used for alerts user vs iank
2050 mail_location = maildir:/m/%u:LAYOUT=fs:INBOX=/m/%u/INBOX
2051 mail_uid = $u
2052 mail_gid = $u
2053
2054 protocol lmtp {
2055 # For a normal setup with exim, we need something like this, which
2056 # removes the domain part
2057 #  auth_username_format = %Ln
2058 #
2059 #  or else # Exim says something like
2060 #  "LMTP error after RCPT ... 550 ... User doesn't exist someuser@somedomain"
2061 # Dovecot verbose log says something like
2062 # "auth-worker(9048): passwd(someuser@somedomain): unknown user"
2063 # reference: http://wiki.dovecot.org/LMTP/Exim
2064 #
2065 # However, I use this to direct all mail to the same inbox.
2066 # A normal way to do this, which I did at first is to have
2067 # a router in exim almost at the end, eg 950,
2068 #local_catchall:
2069 #  debug_print = "R: catchall for \$local_part@\$domain"
2070 #  driver = redirect
2071 #  domains = +local_domains
2072 #  data = $u
2073 # based on
2074 # http://blog.alteholz.eu/2015/04/exim4-and-catchall-email-address/
2075 # with superflous options removed.
2076 # However, this causes the envelope to be rewritten,
2077 # which makes filtering into mailboxes a little less robust or more complicated,
2078 # so I've done it this way instead. it also requires
2079 # modifying the local router in exim.
2080   auth_username_format = $u
2081 }
2082 EOF
2083     ;;&
2084   # **  bk|je)
2085   bk|je)
2086     chown -R mail.mail /m/md
2087
2088     f=/etc/dovecot/conf.d/10-auth.conf
2089     if [[ -e $f ]]; then
2090       mv $f $f-iank-disabled
2091     fi
2092
2093     cat >>/etc/dovecot/local.conf <<EOF
2094 !include /etc/dovecot/local.conf.ext
2095
2096 # for debugging info, uncomment these.
2097 # logs go to syslog and to /var/log/mail.log
2098 #auth_verbose=yes
2099 #mail_debug=yes
2100
2101
2102 protocol lmtp {
2103 # This downcases the localpart. default is case sensitive.
2104 # case sensitive local part will miss out on valid email when some person or system
2105 # mistakenly capitalizes things.
2106   auth_username_format = %Lu
2107 }
2108
2109 # make 147 only listen on localhost, plan to use for nextcloud.
2110 # copied from mailinabox
2111 service imap-login {
2112   inet_listener imap {
2113     address = 127.0.0.1
2114   }
2115 }
2116 # https://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_dovecot_authenticator.html
2117 service auth {
2118   unix_listener auth-client {
2119     user = Debian-exim
2120     group = Debian-exim
2121   }
2122 }
2123
2124
2125 plugin {
2126   sieve_before = /etc/dovecot/sieve-spam.sieve
2127   # from mailinabox
2128   sieve = /m/sieve/%d/%n.sieve
2129   sieve_dir = /m/sieve/%d/%n
2130 }
2131
2132
2133 # all taken from mailinabox.
2134 mail_location = maildir:/m/md/%d/%n
2135 # meh, ok.
2136 mail_privileged_group = mail
2137 # By default Dovecot allows users to log in only with UID numbers 500 and above. mail is 8
2138 first_valid_uid = 1
2139
2140 # todo: test these changes in the universal config
2141 # mailboxes taken from mailinabox but removed
2142 # settings duplicate to defaults
2143 namespace inbox {
2144   mailbox INBOX {
2145     auto = subscribe
2146   }
2147   mailbox Spam {
2148     special_use = \Junk
2149     auto = subscribe
2150   }
2151   mailbox Drafts {
2152     auto = subscribe
2153   }
2154   mailbox Sent {
2155     auto = subscribe
2156   }
2157   mailbox Trash {
2158     auto = subscribe
2159   }
2160   mailbox Archive {
2161     special_use = \Archive
2162     auto = subscribe
2163   }
2164 }
2165 auth_mechanisms = plain login
2166 EOF
2167
2168     u /etc/dovecot/sieve-spam.sieve <<'EOF'
2169 require ["regex", "fileinto", "imap4flags"];
2170
2171 if allof (header :regex "X-Spam-Status" "^Yes") {
2172   fileinto "Spam";
2173   stop;
2174 }
2175 EOF
2176
2177     u /etc/dovecot/local.conf.ext <<'EOF'
2178 passdb {
2179   driver = sql
2180   args = /etc/dovecot/dovecot-sql.conf.ext
2181 }
2182 userdb {
2183   driver = sql
2184   args = /etc/dovecot/dovecot-sql.conf.ext
2185 }
2186
2187 EOF
2188
2189     u /etc/dovecot/dovecot-sql.conf.ext <<'EOF'
2190 # from mailinabox
2191 driver = sqlite
2192 # for je and bk, populated the testignore users for the relevant domains
2193 connect = /m/rc/users.sqlite
2194 default_pass_scheme = SHA512-CRYPT
2195 password_query = SELECT email as user, password FROM users WHERE email='%u';
2196 user_query = SELECT email AS user, "mail" as uid, "mail" as gid, "/m/md/%d/%n" as home FROM users WHERE email='%u';
2197 iterate_query = SELECT email AS user FROM users;
2198 EOF
2199     m chmod 0600 /etc/dovecot/dovecot-sql.conf.ext # per Dovecot instructions
2200
2201     # db needs to be in a www-data writable directory
2202     db=/m/rc/users.sqlite
2203     if [[ ! -s $db ]]; then
2204       m mkdir -p /m/rc
2205       m sqlite3 $db <<'EOF'
2206 CREATE TABLE users (
2207 id INTEGER PRIMARY KEY AUTOINCREMENT,
2208 email TEXT NOT NULL UNIQUE,
2209 password TEXT NOT NULL,
2210 extra,
2211 privileges TEXT NOT NULL DEFAULT '');
2212 EOF
2213     fi
2214     # users.sqlite is saved into /p/c/machine_specific, so update it there!.
2215     #
2216     # example of adding a user:
2217     # hash: doveadm pw -s SHA512-CRYPT -p passhere
2218     # sqlite3 /m/rc/users.sqlite <<'EOF'
2219     #insert into users (email, password) values ('testignore@bk.b8.nz', 'hash');
2220     #EOF
2221     # update users set password = 'hash' where email = 'testignore@bk.b8.nz';
2222
2223     # this should be at the end since it requires a valid dovecot config
2224     m sievec /etc/dovecot/sieve-spam.sieve
2225     ;;&
2226   # **  bk)
2227   bk)
2228     # roundcube uses this
2229     mkdir -p /m/sieve
2230     chown mail.mail /m/sieve
2231     m pi dovecot-managesieved
2232     ;;
2233 esac
2234
2235 # * thunderbird autoconfig setup
2236
2237 bkdomains=(expertpathologyreview.com amnimal.ninja)
2238 if [[ $HOSTNAME == bk ]]; then
2239   for domain in ${bkdomains[@]}; do
2240     m /a/exe/web-conf apache2 autoconfig.$domain
2241     dir=/var/www/autoconfig.$domain/html/mail
2242     m mkdir -p $dir
2243     # taken from mailinabox
2244     u $dir/config-v1.1.xml <<EOF
2245 <?xml version="1.0" encoding="UTF-8"?>
2246 <clientConfig version="1.1">
2247     <emailProvider id="$domain">
2248       <domain>$domain</domain>
2249
2250       <displayName>$domain Mail</displayName>
2251       <displayShortName>$domain</displayShortName>
2252
2253       <incomingServer type="imap">
2254          <hostname>mail2.iankelling.org</hostname>
2255          <port>993</port>
2256          <socketType>SSL</socketType>
2257          <username>%EMAILADDRESS%</username>
2258          <authentication>password-cleartext</authentication>
2259       </incomingServer>
2260
2261       <outgoingServer type="smtp">
2262          <hostname>mail2.iankelling.org</hostname>
2263          <port>587</port>
2264          <socketType>STARTTLS</socketType>
2265          <username>%EMAILADDRESS%</username>
2266          <authentication>password-cleartext</authentication>
2267          <addThisServer>true</addThisServer>
2268          <useGlobalPreferredServer>false</useGlobalPreferredServer>
2269       </outgoingServer>
2270
2271       <documentation url="https://$domain/">
2272          <descr lang="en">$domain website.</descr>
2273       </documentation>
2274     </emailProvider>
2275
2276     <webMail>
2277       <loginPage url="https://$domain/roundcube" />
2278       <loginPageInfo url="https://$domain/roundcube" >
2279         <username>%EMAILADDRESS%</username>
2280         <usernameField id="rcmloginuser" name="_user" />
2281         <passwordField id="rcmloginpwd" name="_pass" />
2282         <loginButton id="rcmloginsubmit" />
2283       </loginPageInfo>
2284     </webMail>
2285     <clientConfigUpdate url="https://autoconfig.$domain/mail/config-v1.1.xml" />
2286 </clientConfig>
2287 EOF
2288   done
2289 fi
2290
2291 # * roundcube setup
2292
2293 if [[ $HOSTNAME == bk ]]; then
2294
2295   # zip according to /installer
2296   # which requires adding a line to /usr/local/lib/roundcubemail/config/config.inc.php
2297   # $config['enable_installer'] = true;
2298   pi roundcube roundcube-sqlite3 php-zip apache2 php-fpm
2299
2300   ### begin composer install
2301   # https://getcomposer.org/doc/faqs/how-to-install-composer-programmatically.md
2302   cd /usr/local/bin
2303   EXPECTED_CHECKSUM="$(php -r 'copy("https://composer.github.io/installer.sig", "php://stdout");')"
2304   php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
2305   ACTUAL_CHECKSUM="$(php -r "echo hash_file('sha384', 'composer-setup.php');")"
2306
2307   if [ "$EXPECTED_CHECKSUM" != "$ACTUAL_CHECKSUM" ]
2308   then
2309     >&2 echo 'ERROR: Invalid installer checksum'
2310     rm composer-setup.php
2311     exit 1
2312   fi
2313
2314   php composer-setup.php --quiet
2315   rm composer-setup.php
2316
2317   # based on error when running composer
2318   mkdir -p /var/www/.composer
2319   chown www-data:www-data /var/www/.composer
2320
2321   ### end composer install
2322
2323   rcdirs=(/usr/local/lib/rcexpertpath /usr/local/lib/rcninja)
2324   ncdirs=(/var/www/ncexpertpath /var/www/ncninja)
2325   # point debian cronjob to our local install, preventing daily cron error
2326
2327   # debian's cronjob will fail, remove both paths it uses just to be sure
2328   rm -fv /usr/share/roundcube/bin/cleandb.sh /etc/cron.d/roundcube-core
2329
2330   #### begin dl roundcube
2331   # note, im r2e subbed to https://github.com/roundcube/roundcubemail/releases.atom
2332   v=1.4.13; f=roundcubemail-$v-complete.tar.gz
2333   cd /root
2334   if [[ -e $f ]]; then
2335     timestamp=$(stat -c %Y $f)
2336   else
2337     timestamp=0
2338   fi
2339   m wget -nv -N https://github.com/roundcube/roundcubemail/releases/download/$v/$f
2340   new_timestamp=$(stat -c %Y $f)
2341   for rcdir in ${rcdirs[@]}; do
2342     if [[ $timestamp != "$new_timestamp" ||  ! -e "$rcdir/config/secret" ]]; then
2343       m tar -C /usr/local/lib --no-same-owner -zxf $f
2344       m rm -rf $rcdir
2345       m mv /usr/local/lib/roundcubemail-$v $rcdir
2346     fi
2347   done
2348   #### end dl roundcube
2349
2350   for ((i=0; i < ${#bkdomains[@]}; i++)); do
2351     domain=${bkdomains[i]}
2352     rcdir=${rcdirs[i]}
2353     rcbase=${rcdir##*/}
2354     ncdir=${ncdirs[i]}
2355
2356     # copied from debians cronjob
2357     u /etc/cron.d/$rcbase <<EOF
2358 #  Roundcube database cleaning: finally removes all records that are
2359 #  marked as deleted.
2360 0   5  *   *   *   www-data $rcdir/bin/cleandb.sh >/dev/null
2361 EOF
2362
2363     m /a/exe/web-conf - apache2 $domain <<EOF
2364 Alias /roundcube $rcdir
2365 ### begin roundcube settings
2366 # taken from /etc/apache2/conf-available/roundcube.conf version 1.4.8+dfsg.1-1~bpo10+1
2367 <Directory $rcdir/>
2368   Options +FollowSymLinks
2369   # This is needed to parse $rcdir/.htaccess.
2370   AllowOverride All
2371   Require all granted
2372 </Directory>
2373 # Protecting basic directories:
2374 <Directory $rcdir/config>
2375   Options -FollowSymLinks
2376   AllowOverride None
2377 </Directory>
2378 ### end roundcube settings
2379
2380
2381 ### begin nextcloud settings
2382 Alias /nextcloud "$ncdir/"
2383 <Directory $ncdir/>
2384   Require all granted
2385   AllowOverride All
2386   Options FollowSymLinks MultiViews
2387
2388   <IfModule mod_dav.c>
2389     Dav off
2390   </IfModule>
2391
2392 </Directory>
2393
2394 # based on install checker, links to
2395 # https://docs.nextcloud.com/server/19/admin_manual/issues/general_troubleshooting.html#service-discovery
2396 # their example was a bit wrong, I figured it out by adding
2397 # LogLevel warn rewrite:trace5
2398 # then watching the apache logs
2399
2400 RewriteEngine on
2401 RewriteRule ^/\.well-known/host-meta /nextcloud/public.php?service=host-meta [QSA,L]
2402 RewriteRule ^/\.well-known/host-meta\.json /nextcloud/public.php?service=host-meta-json [QSA,L]
2403 RewriteRule ^/\.well-known/webfinger /nextcloud/public.php?service=webfinger [QSA,L]
2404 RewriteRule ^/\.well-known/carddav /nextcloud/remote.php/dav/ [R=301,L]
2405 RewriteRule ^/\.well-known/caldav /nextcloud/remote.php/dav/ [R=301,L]
2406 ### end nextcloud settings
2407 EOF
2408     if [[ ! -e $rcdir/config/secret ]]; then
2409       base64 </dev/urandom | head -c24 >$rcdir/config/secret || [[ $? == 141 || ${PIPESTATUS[0]} == 32 ]]
2410     fi
2411     secret=$(cat $rcdir/config/secret)
2412
2413     rclogdir=/var/log/$rcbase
2414     rctmpdir=/var/tmp/$rcbase
2415     rcdb=/m/rc/$rcbase.sqlite
2416     # config from mailinabox
2417     u $rcdir/config/config.inc.php <<EOF
2418 <?php
2419 \$config = array();
2420 # debian creates this for us
2421 \$config['log_dir'] = '$rclogdir/';
2422 # debian also creates a temp dir, but it is under its install dir,
2423 # seems better to have our own.
2424 \$config['temp_dir'] = '$rctmpdir/';
2425 \$config['db_dsnw'] = 'sqlite:///$rcdb?mode=0640';
2426 \$config['default_host'] = 'ssl://localhost';
2427 \$config['default_port'] = 993;
2428 \$config['imap_conn_options'] = array(
2429   'ssl'         => array(
2430      'verify_peer'  => false,
2431      'verify_peer_name'  => false,
2432    ),
2433  );
2434 \$config['imap_timeout'] = 15;
2435 \$config['smtp_server'] = 'tls://127.0.0.1';
2436 \$config['smtp_conn_options'] = array(
2437   'ssl'         => array(
2438      'verify_peer'  => false,
2439      'verify_peer_name'  => false,
2440    ),
2441  );
2442 \$config['product_name'] = 'webmail';
2443 \$config['des_key'] = '$secret';
2444 \$config['plugins'] = array('archive', 'zipdownload', 'password', 'managesieve', 'jqueryui', 'carddav', 'html5_notifier');
2445 \$config['skin'] = 'elastic';
2446 \$config['login_autocomplete'] = 2;
2447 \$config['password_charset'] = 'UTF-8';
2448 \$config['junk_mbox'] = 'Spam';
2449 # disable builtin addressbook
2450 \$config['address_book_type'] = '';
2451 ?>
2452 EOF
2453
2454     m mkdir -p $rclogdir
2455     m chmod 750 $rclogdir
2456     m chown www-data:adm $rclogdir
2457     # note: subscribed to updates:
2458     # r2e add rcmcarddav https://github.com/blind-coder/rcmcarddav/commits/master.atom ian@iankelling.org
2459     # r2e add roundcube https://github.com/roundcube/roundcubemail/releases.atom ian@iankelling.org
2460     m mkdir -p $rctmpdir /m/rc
2461     m chown -R www-data.www-data $rctmpdir /m/rc
2462     m chmod 750 $rctmpdir
2463     # Ensure the log file monitored by fail2ban exists, or else fail2ban can't start.
2464     # todo: check for other mailinabox things
2465     m sudo -u www-data touch $rclogdir/errors.log
2466
2467     #### begin carddav install
2468     # This is the official roundcube carddav repo.
2469     # Install doc suggests downloading with composer, but that
2470     # didnt work, it said some ldap package for roundcube was missing,
2471     # but I dont want to download some extra ldap thing.
2472     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/INSTALL.md
2473     verf=$rcdir/plugins/carddav/myversion
2474     upgrade=false
2475     install=false
2476     v=5.0.1
2477     if [[ -e $verf ]]; then
2478       if [[ $(cat $verf) != "$v" ]]; then
2479         install=true
2480         upgrade=true
2481       fi
2482     else
2483       install=true
2484     fi
2485     if $install; then
2486       m rm -rf $rcdir/plugins/carddav
2487       tmpd=$(mktemp -d)
2488       m wget -nv -O $tmpd/t.tgz https://github.com/blind-coder/rcmcarddav/releases/download/v$v/carddav-v$v.tar.gz
2489       cd $rcdir/plugins
2490       tar xzf $tmpd/t.tgz
2491       rm -rf $tmpd
2492       m chown -R www-data:www-data $rcdir/plugins/carddav
2493       m cd $rcdir/plugins/carddav
2494       if $upgrade; then
2495         m sudo -u www-data composer.phar update --no-dev
2496       else
2497         m sudo -u www-data composer.phar install --no-dev
2498       fi
2499       m chown -R root:root $rcdir/plugins/carddav
2500       echo $v >$verf
2501     fi
2502
2503     # So, strangely, this worked in initial testing, but then
2504     # on first run it wouldn't show the existing contacts until
2505     # I went into the carddav settings and did "force immediate sync",
2506     # which seemed to fix things. Note, some of these settings
2507     # get initalized per/addressbook in the db, then need changing
2508     # there or through the settings menu.
2509
2510     # About categories, see https://www.davx5.com/tested-with/nextcloud
2511     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/GROUPS.md
2512     u $rcdir/plugins/carddav/config.inc.php <<EOF;
2513 <?php
2514 \$prefs['_GLOBAL']['hide_preferences'] = false;
2515 \$prefs['davserver'] = array(
2516 # name in the UI is kind of dumb. This is just something short that seems to fit ok.
2517   'name'         =>  'Main',
2518   'username'     =>  '%u', // login username
2519   'password'     =>  '%p', // login password
2520   'url'          =>  'https://$domain/nextcloud/remote.php/dav/addressbooks/users/%u/contacts',
2521   'active'       =>  true,
2522   'readonly'     =>  false,
2523   'refresh_time' => '00:10:00',
2524   'fixed'        =>  array('username','password'),
2525   'use_categories' => false,
2526   'hide'        =>  false,
2527 );
2528 ?>
2529 EOF
2530     #### end carddav install
2531
2532     cd $rcdir/plugins
2533     if [[ ! -d html5_notifier ]]; then
2534       m git clone https://github.com/stremlau/html5_notifier
2535     fi
2536     cd $rcdir/plugins/html5_notifier
2537     m git pull --rebase
2538
2539     # todo: try out roundcube plugins: thunderbird labels
2540
2541     # Password changing plugin settings
2542     cat $rcdir/plugins/password/config.inc.php.dist - >$rcdir/plugins/password/config.inc.php <<'EOF'
2543 # following are from mailinabox
2544 $config['password_minimum_length'] = 8;
2545 $config['password_db_dsn'] = 'sqlite:////m/rc/users.sqlite';
2546 $config['password_query'] = 'UPDATE users SET password=%D WHERE email=%u';
2547 $config['password_dovecotpw'] = '/usr/bin/doveadm pw';
2548 $config['password_dovecotpw_method'] = 'SHA512-CRYPT';
2549 $config['password_dovecotpw_with_method'] = true;
2550 EOF
2551     # so PHP can use doveadm, for the password changing plugin
2552     m usermod -a -G dovecot www-data
2553     m usermod -a -G mail $u
2554
2555     # so php can update passwords
2556     m chown www-data:dovecot /m/rc/users.sqlite
2557     m chmod 664 /m/rc/users.sqlite
2558
2559     # Run Roundcube database migration script (database is created if it does not exist)
2560     m $rcdir/bin/updatedb.sh --dir $rcdir/SQL --package roundcube
2561     m chown www-data:www-data $rcdb
2562     m chmod 664 $rcdb
2563   done # end loop over domains and rcdirs
2564
2565   ### begin php setup for rc ###
2566   # Enable PHP modules.
2567   m phpenmod -v php mcrypt imap
2568   # dpkg says this is required.
2569   # nextcloud needs these too
2570   m a2enmod proxy_fcgi setenvif
2571   fpm=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* (php[^ ]*-fpm)( .*|$)/\1/p') # eg: php7.4-fpm
2572   phpver=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* php([^ ]*)-fpm( .*|$)/\1/p')
2573   m a2enconf $fpm
2574   # 3 useless guides on php fpm fcgi debian 10 later, i figure out from reading
2575   # /etc/apache2/conf-enabled/php7.3-fpm.conf
2576   m a2dismod php$phpver
2577   # according to /install, we should set date.timezone,
2578   # but that is dumb, the system already has the right zone in
2579   # $rclogdir/errors.log
2580   # todo: consider other settings in
2581   # /a/opt/mailinabox/setup/nextcloud.sh
2582   u /etc/php/$phpver/cli/conf.d/30-local.ini <<'EOF'
2583 apc.enable_cli = 1
2584 EOF
2585
2586   u /etc/php/$phpver/fpm/conf.d/30-local.ini <<'EOF'
2587 date.timezone = "America/New_York"
2588 # for nextcloud
2589 upload_max_filesize = 2000M
2590 post_max_size = 2000M
2591 # install checker, nextcloud/settings/admin/overview
2592 memory_limit = 512M
2593 EOF
2594   m systemctl restart $fpm
2595   # dunno if reload/restart is needed
2596   m systemctl reload apache2
2597   # note bk backups are defined in crontab outside this file
2598   ### end php setup for rc ###
2599
2600 fi # end roundcube setup
2601
2602 # * nextcloud setup
2603
2604 if [[ $HOSTNAME == bk ]]; then
2605   # from install checker, nextcloud/settings/admin/overview and
2606   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2607   # curl from the web installer requirement, but i switched to cli
2608   # it recommends php-file info, but that is part of php7.3-common, already got installed
2609   # with roundcube.
2610   m pi php-curl php-bz2 php-gmp php-bcmath php-imagick php-apcu
2611
2612   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2613   cat >/etc/php/$phpver/fpm/pool.d/localwww.conf <<'EOF'
2614 [www]
2615 clear_env = no
2616 EOF
2617
2618   for ((i=0; i < ${#bkdomains[@]}; i++)); do
2619     domain=${bkdomains[i]}
2620     ncdir=${ncdirs[i]}
2621     myncdir=/var/local/${ncdir##*/}
2622     ncbase=${ncdir##*/}
2623     mkdir -p $myncdir
2624     m cd /var/www
2625     if [[ ! -e $ncdir/index.php ]]; then
2626       # if we wanted to only install a specific version, use something like
2627       # file=latest-22.zip
2628       file=latest.zip
2629       m wget -nv -N https://download.nextcloud.com/server/releases/$file
2630       m rm -rf nextcloud
2631       m unzip -q $file
2632       m rm -f $file
2633       m chown -R www-data.www-data nextcloud
2634       m mv nextcloud $ncdir
2635     fi
2636
2637     if [[ ! -e $myncdir/done-install ]]; then
2638       m cd $ncdir
2639       m sudo -u www-data php occ  maintenance:install --database sqlite --admin-user iank --admin-pass $nextcloud_admin_pass
2640       m touch $myncdir/done-install
2641     fi
2642
2643     m cd $ncdir/config
2644     # if we did this more than once, it would revert the
2645     # version number to the original.
2646     if [[ ! -e $myncdir/config.php-orig || ! -s config.php ]]; then
2647       if [[ -s config.php ]]; then
2648         m cp -a config.php $myncdir/config.php-orig
2649         # keep the file so it keeps the same permissions.
2650         truncate -s0 config.php
2651       fi
2652       cat $myncdir/config.php-orig - >$myncdir/tmp.php <<EOF
2653 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/email_configuration.html
2654 \$CONFIG["mail_smtpmode"] = "sendmail";
2655 \$CONFIG["mail_smtphost"] = "127.0.0.1";
2656 \$CONFIG["mail_smtpport"] = 25;
2657 \$CONFIG["mail_smtptimeout"] = 10;
2658 \$CONFIG["mail_smtpsecure"] = "";
2659 \$CONFIG["mail_smtpauth"] = false;
2660 \$CONFIG["mail_smtpauthtype"] = "LOGIN";
2661 \$CONFIG["mail_smtpname"] = "";
2662 \$CONFIG["mail_smtppassword"] = "";
2663 \$CONFIG["mail_domain"] = "$domain";
2664
2665 # https://github.com/nextcloud/user_external#readme
2666 # plus mailinabox example
2667 #\$CONFIG['user_backends'] = array(array('class' => 'OC_User_IMAP','arguments' => array('127.0.0.1', 143, null),),);
2668
2669
2670 # based on installer check
2671 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/caching_configuration.html
2672 \$CONFIG['memcache.local'] = '\OC\Memcache\APCu';
2673
2674 \$CONFIG['overwrite.cli.url'] = 'https://$domain/nextcloud';
2675 \$CONFIG['htaccess.RewriteBase'] = '/nextcloud';
2676 \$CONFIG['trusted_domains'] = array (
2677         0 => '$domain',
2678     );
2679 #\$CONFIG[''] = '';
2680 fwrite(STDOUT, "<?php\n\\\$CONFIG = ");
2681 var_export(\$CONFIG);
2682 fwrite(STDOUT, ";\n");
2683 EOF
2684       e running php $myncdir/tmp.php
2685       # note: we leave it around place for debugging
2686       # shellcheck disable=SC2024 # intended
2687       sudo -u www-data php $myncdir/tmp.php >config.php
2688     fi
2689     cd $ncdir
2690     m sudo -u www-data php occ maintenance:update:htaccess
2691     list=$(sudo -u www-data php $ncdir/occ --output=json_pretty app:list)
2692     # user_external not compaible with nc 23
2693     for app in contacts calendar; do
2694       if [[ $(printf "%s\n" "$list"| jq ".enabled.$app") == null ]]; then
2695         cd $ncdir
2696         m sudo -u www-data php occ app:install $app
2697       fi
2698     done
2699     u /etc/systemd/system/$ncbase.service <<EOF
2700 [Unit]
2701 Description=ncup $ncbase
2702 After=multi-user.target
2703
2704 [Service]
2705 Type=oneshot
2706 ExecStart=/usr/local/bin/ncup $ncbase
2707 User=www-data
2708 IOSchedulingClass=idle
2709 CPUSchedulingPolicy=idle
2710 EOF
2711     u /etc/systemd/system/$ncbase.timer <<EOF
2712 [Unit]
2713 Description=ncup $ncbase timer
2714
2715 [Timer]
2716 OnCalendar=Daily
2717
2718 [Install]
2719 WantedBy=timers.target
2720 EOF
2721     systemctl enable --now $ncbase.timer
2722     u /usr/local/bin/ncup <<'EOFOUTER'
2723 #!/bin/bash
2724
2725 source /usr/local/lib/err
2726
2727 m() { printf "%s\n" "$*";  "$@"; }
2728 err-cleanup() {
2729   echo failed nextcloud update for $ncbase >&2
2730   # -odf or else systemd will kill the background delivery process
2731   # and the message will sit in the queue until the next queue run.
2732   exim -odf -t <<EOF
2733 To: alerts@iankelling.org
2734 From: www-data@$(hostname -f)
2735 Subject: failed nextcloud update for $ncbase
2736
2737 For logs, run: jr -u $ncbase
2738 EOF
2739 }
2740
2741 if [[ $(id -u -n) != www-data ]]; then
2742   echo error: running as wrong user: $(id -u -n), expected www-data
2743   exit 1
2744 fi
2745
2746 if [[ ! $1 ]]; then
2747   echo error: expected an arg, nextcloud relative base dir
2748   exit 1
2749 fi
2750
2751 ncbase=$1
2752 cd /var/www/$ncbase
2753 # https://docs.nextcloud.com/server/22/admin_manual/maintenance/update.html?highlight=updater+phar
2754 # the docs claim this is all you need, which is not true.
2755 # You will go to the web ui and it will say that you need to click a button to update,
2756 # or that you can run occ upgrade
2757 m php /var/www/$ncbase/updater/updater.phar -n
2758 # throw a sleep in just because who knows what else is undocumented
2759 sleep 5
2760 m php occ upgrade
2761 EOFOUTER
2762     chmod +x /usr/local/bin/ncup
2763
2764     mkdir -p /var/www/cron-errors
2765     chown www-data.www-data /var/www/cron-errors
2766     u /etc/cron.d/$ncbase <<EOF
2767 PATH=/usr/sbin:/sbin:/usr/bin:/bin:/usr/local/bin
2768 SHELL=/bin/bash
2769 # https://docs.nextcloud.com/server/20/admin_manual/configuration_server/background_jobs_configuration.html
2770 */5  *  *  *  * www-data php -f $ncdir/cron.php --define apc.enable_cli=1 |& log-once nccron
2771 EOF
2772
2773   done
2774 fi
2775
2776
2777 # * exim host conditional config
2778
2779 # ** exim certs
2780
2781 all_dirs=(/p/c/filesystem)
2782 for x in /p/c/machine_specific/*.hosts /a/bin/ds/machine_specific/*.hosts; do
2783   if grep -qxF $HOSTNAME $x; then all_dirs+=( ${x%.hosts} ); fi
2784 done
2785 files=()
2786 for d in ${all_dirs[@]}; do
2787   f=$d/etc/exim4/passwd
2788   if [[ -e $f  ]]; then
2789     files+=($f)
2790   fi
2791   tmp=($d/etc/exim4/*.pem)
2792   if (( ${#tmp[@]} )); then
2793     files+=(${tmp[@]})
2794   fi
2795 done
2796
2797 if (( ${#files[@]} )); then
2798   sudo rsync -ahhi --chown=root:Debian-exim --chmod=0640 ${files[@]} /etc/exim4/
2799 fi
2800
2801
2802 # ** exim: auth
2803
2804 case $HOSTNAME in
2805   bk|je)
2806     # avoid accepting mail for invalid users
2807     # https://wiki.dovecot.org/LMTP/Exim
2808     cat >>/etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2809 deny
2810   message = invalid recipient
2811   domains = +local_domains
2812   !verify = recipient/callout=no_cache
2813 EOF
2814     u /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2815 dovecot_plain:
2816   driver = dovecot
2817   public_name = PLAIN
2818   server_socket = /var/run/dovecot/auth-client
2819   server_set_id = $auth1
2820 EOF
2821     ;;
2822 esac
2823 if $bhost_t; then
2824   u /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2825 # from 30_exim4-config_examples
2826 plain_server:
2827 driver = plaintext
2828 public_name = PLAIN
2829 server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
2830 server_set_id = $auth2
2831 server_prompts = :
2832 .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
2833 server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
2834 .endif
2835 EOF
2836 fi
2837
2838 # ** exim: main daemon use non-default config file
2839 case $HOSTNAME in
2840   bk|$MAIL_HOST)
2841     # to see the default comments in /etc/default/exim4:
2842     # s update-exim4defaults --force --init
2843     # which will overwrite any existing file
2844     u /etc/default/exim4 <<'EOF'
2845 QUEUERUNNER='combined'
2846 # note: this is duplicated in brc2, 10m here is -q10m there.
2847 QUEUEINTERVAL='10m'
2848 COMMONOPTIONS='-C /etc/exim4/my.conf'
2849 UPEX4OPTS='-o /etc/exim4/my.conf'
2850 # i use epanic-clean for alerting if there are bad paniclog entries
2851 E4BCD_WATCH_PANICLOG='no'
2852 EOF
2853     # make exim be a nonroot setuid program.
2854     chown Debian-exim:Debian-exim /usr/sbin/exim4
2855     # needs guid set in order to become Debian-exim
2856     chmod g+s,u+s /usr/sbin/exim4
2857     # need this to avoid error on service reload:
2858     # 2022-08-07 18:44:34.005 [892491] pid 892491: SIGHUP received: re-exec daemon
2859     # 2022-08-07 18:44:34.036 [892491] cwd=/var/spool/exim4 5 args: /usr/sbin/exim4 -bd -q30m -C /etc/exim4/my.conf
2860     # 2022-08-07 18:44:34.043 [892491] socket bind() to port 25 for address (any IPv6) failed: Permission denied: waiting 30s before trying again (9 more tries)
2861     # note: the daemon gives up and dies after retrying those 9 times.
2862     # I came upon this by guessing and trial and error.
2863     setcap CAP_NET_BIND_SERVICE+ei /usr/sbin/exim4
2864     u /etc/exim4/trusted_configs <<'EOF'
2865 /etc/exim4/my.conf
2866 EOF
2867     ;;
2868   *)
2869     # default file
2870     u /etc/default/exim4 <<'EOF'
2871 QUEUERUNNER='combined'
2872 QUEUEINTERVAL='30m'
2873 EOF
2874     ;;
2875 esac
2876
2877 # ** exim non-root
2878
2879 case $HOSTNAME in
2880   bk|je|li)
2881     # no reason to expect it to ever be there.
2882     rm -fv /etc/systemd/system/exim4.service.d/nonroot.conf
2883     ;;
2884   *)
2885     dirs=()
2886     for d in /a /d /m /media /mnt /nocow /o /p /q; do
2887       if [[ -d $d ]]; then
2888         dirs+=($d)
2889       fi
2890     done
2891     u /etc/systemd/system/exim4.service.d/nonroot.conf <<EOF
2892 [Service]
2893 # see 56.2 Root privilege in exim spec
2894 AmbientCapabilities=CAP_NET_BIND_SERVICE
2895 # https://www.redhat.com/sysadmin/mastering-systemd
2896 # things that seem good and reasonabl.e
2897 PrivateTmp=yes
2898 ProtectHome=yes
2899 # note, in t10 systemd, if one of these is an sshfs mountpoint,
2900 # this whole setting doesnt work. tried it with a newer systemd 250 though
2901 # an nspawn, and it worked there.
2902 InaccessiblePaths=${dirs[@]}
2903 # this gives us the permission denied error:
2904 # socket bind() to port 25 for address (any IPv6) failed: Permission denied
2905 # but we also have to set the file capabilities to avoid the error.
2906 #NoNewPrivileges=yes
2907 ProtectSystem=yes
2908
2909 # when we get newer systemd
2910 #ProtectDevices=yes
2911 EOF
2912     u /etc/exim4/conf.d/main/000_local-noroot <<'EOF'
2913 # see 56.2 Root privilege in exim spec
2914 deliver_drop_privilege = true
2915 EOF
2916     files=(
2917       300_exim4-config_real_local
2918       600_exim4-config_userforward
2919       700_exim4-config_procmail
2920       800_exim4-config_maildrop
2921       mmm_mail4root
2922     )
2923     for f in ${files[@]}; do
2924       echo "# iank: removed due to running nonroot"|u /etc/exim4/conf.d/router/$f
2925     done
2926     ;;
2927 esac
2928
2929 case $HOSTNAME in
2930
2931   # ** $MAIL_HOST|bk|je)
2932   $MAIL_HOST|bk|je)
2933
2934     echo|u /etc/exim4/conf.d/router/165_backup_local
2935
2936     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2937 # note: some things we don't set that are here by default because they are unused.
2938 dc_local_interfaces=''
2939 dc_eximconfig_configtype='internet'
2940 dc_localdelivery='dovecot_lmtp'
2941 EOF
2942     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2943 # recommended if dns is expected to work
2944 CHECK_RCPT_VERIFY_SENDER = true
2945 # default config comment says: If you enable this, you might reject legitimate mail,
2946 # but eggs has had this a long time, so that seems unlikely.
2947 CHECK_RCPT_SPF = true
2948 CHECK_RCPT_REVERSE_DNS = true
2949 CHECK_MAIL_HELO_ISSUED = true
2950
2951
2952 CHECK_DATA_LOCAL_ACL_FILE = /etc/exim4/conf.d/data_local_acl
2953 CHECK_RCPT_LOCAL_ACL_FILE = /etc/exim4/conf.d/rcpt_local_acl
2954
2955 # testing dmarc
2956 #dmarc_tld_file = /etc/public_suffix_list.dat
2957
2958 EOF
2959     ;;&
2960
2961   # ** $MAIL_HOST|bk)
2962   $MAIL_HOST|bk)
2963
2964     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2965 dc_relay_nets='defaultnn.b8.nz'
2966 EOF
2967
2968
2969     cat >/etc/exim4/conf.d/main/000_local-nn <<EOF
2970 # MAIN_HARDCODE_PRIMARY_HOSTNAME might mess up the
2971 # smarthost config type, not sure.
2972 # failing message on mail-tester.com:
2973 # We check if there is a server (A Record) behind your hostname kd.
2974 # You may want to publish a DNS record (A type) for the hostname kd or use a different hostname in your mail software
2975 # https://serverfault.com/questions/46545/how-do-i-change-exim4s-primary-hostname-on-a-debian-box
2976 # and this one seemed appropriate from grepping config.
2977 # I originally set this to li.iankelling.org, but then ended up with errors when li tried to send
2978 # mail to kd, so this should basically be a name that no host has as their
2979 # canonical hostname since the actual host sits behind a nat and changes.
2980 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail.iankelling.org
2981 # I used this to avoid sender verification, didnt work but it still
2982 # makes sense based on the spec.
2983 hosts_treat_as_local = defaultnn.b8.nz
2984
2985 # Outside nn, we get the default cert location from a debian macro,
2986 # and the cert file is put in place by a certbot hook.
2987 MAIN_TLS_CERTIFICATE = /etc/exim4/fullchain.pem
2988 MAIN_TLS_PRIVATEKEY = /etc/exim4/privkey.pem
2989 EOF
2990
2991     u /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost <<'EOF'
2992 gnusmarthost:
2993   debug_print = "R: smarthost for $local_part@$domain"
2994   driver = manualroute
2995   domains = ! +local_domains
2996 # comment senders to send most mail through eggs, helps fsfs sender reputation.
2997 # uncomment and optionally move to 188 file to send through my own servers again
2998   senders = *@gnu.org
2999   transport = smarthost_dkim
3000   route_list = * fencepost.gnu.org::587 byname
3001   host_find_failed = ignore
3002   same_domain_copy_routing = yes
3003   no_more
3004 EOF
3005
3006     /a/exe/cedit defaultnn /etc/hosts <<'EOF' || [[ $? == 1 ]]
3007 10.173.8.1 defaultnn.b8.nz
3008 EOF
3009     ;;&
3010   # ** $MAIL_HOST)
3011   $MAIL_HOST)
3012
3013
3014
3015     u /etc/exim4/conf.d/router/155_delay <<'EOF'
3016 By default, delay sending email by 30-40 minutes in case I
3017 change my mind.
3018
3019 # Note, if we switch mail_host, the next queue run will
3020 # send the message to mail_host and the delay will be reset.
3021 # That is fine. I could probably set some header to track
3022 # the delay but it is not worth it.
3023 delay_iank:
3024   driver = redirect
3025   allow_defer
3026   data = :defer:
3027   # It hasnt been 30 minutes since we received the message.
3028   # we can avoid delay by adding the header i: or putting the exim message id into a file,
3029   # or pulling "all" into a file.
3030   # note, true false at the end just for easier debugging when pasting into a exim -Mset ID -be.
3031   condition = ${if and { \
3032 {< {$tod_epoch} {${eval10:$received_time + 60*30}}} \
3033 {!def:h_i:} \
3034 {!bool{${lookup{$message_exim_id}lsearch{/etc/exim4/no-delay-eximids}{true}}}} \
3035 {!bool{${lookup{all}lsearch{/etc/exim4/no-delay-eximids}{true}}}} \
3036 } {true}{false}}
3037   headers_remove = <; i:
3038   domains = ! +local_domains
3039   # uncomment for testing delays to jtuttle
3040   # local_parts = ! root : ! testignore : ! alerts : ! ian-pager : ! daylert
3041   local_parts = ! root : ! testignore : ! alerts : ! jtuttle : ! ian-pager : ! daylert
3042   ignore_target_hosts = ROUTER_DNSLOOKUP_IGNORE_TARGET_HOSTS
3043 EOF
3044
3045     u /etc/exim4/conf.d/router/195_dnslookup_vpn <<'EOF'
3046 # copied from /etc/exim4/conf.d/router/200_exim4-config_primary, but
3047 # use vpn transport. lower priority so it overrides the default route.
3048 # Use this in case our vpn fails, we dont send anything without it.
3049 .ifdef DCconfig_internet
3050 dnslookup_vpn:
3051   debug_print = "R: dnslookup for $local_part@$domain"
3052   driver = dnslookup
3053   domains = ! +local_domains
3054   transport = remote_smtp_vpn
3055   same_domain_copy_routing = yes
3056   ignore_target_hosts = <; 0.0.0.0 ; 127.0.0.0/8 ; 192.168.0.0/16 ; 172.16.0.0/12 ; 10.0.0.0/8 ; 169.254.0.0/16 ; 255.255.255.255 ; ::/128 ; ::1/128 ; fc00::/7 ; fe80::/10 ; 100::/64
3057   no_more
3058 .endif
3059 EOF
3060
3061
3062     # note on backups: I used to do an automatic sshfs and restricted
3063     # permissions to a specific directory on the remote server, /bu/mnt,
3064     # which required using a dedicated user, but realized smtp will be
3065     # more reliable and less fuss. If I ever need that again, see the
3066     # history of this file, and bum in brc2.
3067     u /etc/exim4/conf.d/router/161_backup_redir_nn <<'EOF'
3068 backup_redir_nn:
3069 driver = redirect
3070 # b is just an arbirary short string
3071 data = b@eximbackup.b8.nz
3072 condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
3073 # note, to test this, i could temporarily allow testignore.
3074 # alerts avoids potential mail loop. root is already
3075 # redirected earlier, so that is just being overly cautious.
3076 local_parts = ! root : ! testignore : ! alerts : ! jtuttle : ! ian-pager : ! daylert
3077 unseen = true
3078 errors_to = alerts@iankelling.org
3079 EOF
3080
3081
3082
3083     # This allows for forwarded mail to not get most rcpt checks, especially SPF,
3084     # which would incorrectly get denied.
3085     u /etc/exim4/host_local_deny_exceptions <<'EOF'
3086 mail.fsf.org
3087 *.posteo.de
3088 EOF
3089
3090     # cron email from smarthost hosts will automatically be to
3091     # USER@FQDN. I redirect that to alerts@, on the smarthosts, but in
3092     # case that doesn't work, we still want to accept that mail, but not
3093     # from any host except the smarthosts. local_hostnames and this rule
3094     # is for that purpose.
3095     u /etc/exim4/conf.d/rcpt_local_acl <<'EOF'
3096 deny
3097   !authenticated = *
3098   domains = +local_hostnames
3099   message = no relay
3100
3101 # for testing bounce behavior
3102 #deny
3103 #  senders = testlist-bounces+test=zroe.org@fsf.org
3104 #  message = iank-bounce
3105 EOF
3106     echo|u /etc/exim4/conf.d/router/880_universal_forward
3107
3108
3109     cat >>/etc/exim4/conf.d/main/000_local <<EOF
3110 MAILDIR_HOME_MAILDIR_LOCATION = /m/md/Sent
3111 EOF
3112
3113
3114     u /etc/exim4/conf.d/router/186_sentarchive_nn <<'EOF'
3115 # ian: save a copy of sent mail. i thought of other ways to
3116 # do this, for example, to only save sent mail that is not sent
3117 # from my mail client which saves a copy by default, but in the
3118 # end, it seems simplest to turn that off. We want to save
3119 # external mail sent by smarthosts.
3120 sentarchive_nn:
3121   driver = redirect
3122   domains = ! +local_domains
3123   condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
3124   data    = vojdedIdNejyebni@b8.nz
3125   unseen
3126 EOF
3127
3128
3129     # for iank@fsf.org, i have mail.fsf.org forward it to fsf@iankelling.org.
3130     # and also have mail.iankelling.org whitelisted as a relay domain.
3131     # I could avoid that if I changed this to submit to 587 with a
3132     # password like a standard mua.
3133     u /etc/exim4/conf.d/router/188_exim4-config_smarthost <<'EOF'
3134 # ian: copied from /etc/exim4/conf.d/router/200_exim4-config_primary, and added senders = and
3135 # replaced DCsmarthost with hostname
3136 fsfsmarthost:
3137   debug_print = "R: smarthost for $local_part@$domain"
3138   driver = manualroute
3139   domains = ! +local_domains
3140   senders = *@fsf.org
3141   transport = remote_smtp_smarthost
3142   route_list = * mail.fsf.org::587 byname
3143   host_find_failed = ignore
3144   same_domain_copy_routing = yes
3145   no_more
3146
3147 posteosmarthost:
3148   debug_print = "R: smarthost for $local_part@$domain"
3149   driver = manualroute
3150   domains = ! +local_domains
3151   senders = *@posteo.net
3152   transport = remote_smtp_smarthost
3153   route_list = * posteo.de::587 byname
3154   host_find_failed = ignore
3155   same_domain_copy_routing = yes
3156   no_more
3157 EOF
3158
3159     # Greping /etc/exim4, unqualified mails this would end up as
3160     # a return path, so it should go somewhere we will see.
3161     # The debconf output about mailname is as follows:
3162     # The 'mail name' is the domain name used to 'qualify' mail addresses without a domain
3163     # name.
3164     # This name will also be used by other programs. It should be the single, fully
3165     # qualified domain name (FQDN).
3166     # Thus, if a mail address on the local host is foo@example.org, the correct value for
3167     # this option would be example.org.
3168     # This name won\'t appear on From: lines of outgoing messages if rewriting is enabled.
3169     echo iankelling.org > /etc/mailname
3170
3171
3172     # mail.iankelling.org so local imap clients can connect with tls and
3173     # when they happen to not be local.
3174     # todo: this should be 10.8.0.4
3175
3176     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
3177 # note: i put nn.b8.nz into bind for good measure
3178 10.173.8.2 nn.b8.nz mx.iankelling.org
3179 EOF
3180
3181     # note: systemd-resolved will consult /etc/hosts, dnsmasq wont. this assumes
3182     # weve configured this file in dnsmasq if we are using it.
3183     /a/exe/cedit mail /etc/dnsmasq-servers.conf <<'EOF' || [[ $? == 1 ]]
3184 server=/mx.iankelling.org/127.0.1.1
3185 EOF
3186     # I used to use debconf-set-selections + dpkg-reconfigure,
3187     # which then updates this file
3188     # but the process is slower than updating it directly and then I want to set other things in
3189     # update-exim4.conf.conf, so there's no point.
3190     # The file is documented in man update-exim4.conf,
3191     # except the man page is not perfect, read the bash script to be sure about things.
3192
3193     # The debconf questions output is additional documentation that is not
3194     # easily accessible, but super long, along with the initial default comment in this
3195     # file, so I've saved that into ./mail-notes.conf.
3196     #
3197     # # TODO: remove mx.iankelling.org once systems get updated mail-setup from jan 2022
3198     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3199 # man page: is used to build the local_domains list, together with "localhost"
3200 # this is duplicated in a later router.
3201 dc_other_hostnames='iankelling.org;zroe.org;r2e.iankelling.org;mx.iankelling.org;!je.b8.nz;!bk.b8.nz;*.b8.nz;b8.nz'
3202 EOF
3203
3204
3205     # dmarc. not used currently
3206     f=/etc/cron.daily/refresh-dmarc-tld-file
3207     cat >$f <<'EOF'
3208 #!/bin/bash
3209 cd /etc
3210 wget -q -N https://publicsuffix.org/list/public_suffix_list.dat
3211 EOF
3212     m chmod 755 $f
3213
3214     ;;
3215   # ** bk
3216   ## we use this host to monitor MAIL_HOST and host a mail server for someone
3217   bk)
3218
3219     # No clamav on je, it has 1.5g memory and clamav uses most of it.
3220     #
3221     # No clamav on MAIL_HOST because it is just a waste of useful cpu
3222     # time and memory when I'm running on an x200, and it takes 30
3223     # seconds to shut down.
3224
3225     cat >>/etc/exim4/conf.d/main/000_local <<EOF
3226 # je.b8.nz will run out of memory with freshclam
3227 av_scanner = clamd:/var/run/clamav/clamd.ctl
3228 EOF
3229
3230     cat >> /etc/exim4/conf.d/data_local_acl <<'EOF'
3231 deny
3232   malware = */defer_ok
3233   !condition = ${if match {$malware_name}{\N^Heuristic\N}}
3234   message = This message was detected as possible malware ($malware_name).
3235
3236 warn
3237   !hosts = +iank_trusted
3238   !authenticated = *
3239   condition = ${if def:malware_name}
3240   remove_header = Subject:
3241   add_header = Subject: [Clamav warning: $malware_name] $h_subject
3242   log_message = heuristic malware warning: $malware_name
3243
3244 warn
3245   # fdate = future date. # tdate = temporary date.
3246   condition = ${if def:h_fdate}
3247   remove_header = fdate:
3248   add_header = tdate:
3249   control = freeze
3250 EOF
3251
3252
3253     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
3254 10.173.8.2 nn.b8.nz
3255 EOF
3256
3257     sed -r -f - /etc/init.d/exim4  <<'EOF' |u /etc/init.d/exim4in
3258 s,/etc/default/exim4,/etc/default/exim4in,g
3259 s,/run/exim4/exim.pid,/run/exim4/eximin.pid,g
3260 s,(^[ #]*Provides:).*,\1 exim4in,
3261 s,(^[ #]*NAME=).*,\1"exim4in",
3262 EOF
3263     chmod +x /etc/init.d/exim4in
3264     u /etc/systemd/system/exim4in.service.d/alwaysrestart.conf <<'EOF'
3265 [Unit]
3266 # needed to continually restart
3267 StartLimitIntervalSec=0
3268
3269 [Service]
3270 Restart=always
3271 # time to sleep before restarting a service
3272 RestartSec=20
3273 EOF
3274
3275     u /etc/default/exim4in <<'EOF'
3276 # defaults but no queue runner and alternate config dir
3277 QUEUERUNNER='no'
3278 COMMONOPTIONS='-oP /run/exim4/eximin.pid'
3279 UPEX4OPTS='-d /etc/myexim4'
3280 EOF
3281
3282     echo bk.b8.nz > /etc/mailname
3283     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3284 # man page: is used to build the local_domains list, together with "localhost"
3285 dc_other_hostnames='amnimal.ninja;expertpathologyreview.com;bk.b8.nz'
3286 EOF
3287
3288     ;;
3289   # ** je
3290   je)
3291     echo je.b8.nz > /etc/mailname
3292     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3293 dc_other_hostnames='je.b8.nz'
3294 EOF
3295     ;;
3296   # ** not MAIL_HOST|bk|je
3297   *)
3298     echo|u /etc/exim4/conf.d/router/155_delay
3299     # this one should be removed for all non mail_hosts. note
3300     # bk and je never become mail_host
3301     echo|u /etc/exim4/conf.d/router/195_dnslookup_vpn
3302     echo|u /etc/exim4/conf.d/router/160_backup_redir
3303     echo|u /etc/exim4/conf.d/router/161_backup_redir_nn
3304     echo|u /etc/exim4/conf.d/router/185_sentarchive
3305     echo|u /etc/exim4/conf.d/router/186_sentarchive_nn
3306     # Note, in general we could submit to smarthosts on non MAIL_HOST.
3307     # however, delayed mail makes this inconvenient, because I
3308     # occasionally want to send an email from a non-MAIL_HOST and then
3309     # turn off that computer or travel with it so it is disconnected.
3310     # It is also probably easier to setup emacs to delay messages, but
3311     # that would mean we need to keep emacs running, this is much
3312     # nicer.
3313     echo|u /etc/exim4/conf.d/router/188_exim4-config_smarthost
3314     echo|u /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
3315     echo|u /etc/exim4/conf.d/rcpt_local_acl
3316     echo|u /etc/exim4/conf.d/main/000_local-nn
3317
3318
3319     if $bhost_t; then
3320       cat >>/etc/exim4/conf.d/main/000_local <<EOF
3321 MAIN_TLS_CERTIFICATE = /etc/exim4/certs/$wghost/fullchain.pem
3322 MAIN_TLS_PRIVATEKEY = /etc/exim4/certs/$wghost/privkey.pem
3323 # so we can maintiain the originals of the backups.
3324 # we wouldnt want this if we were dealing with any other
3325 # local deliveries, but we sent all others to the smarthost
3326 # which then strips the headers.
3327 envelope_to_remove = false
3328 return_path_remove = false
3329 EOF
3330     fi
3331
3332     # catches things like cronjob email
3333     u /etc/exim4/conf.d/router/880_universal_forward <<'EOF'
3334 universal_forward:
3335   driver = redirect
3336   domains = +local_domains
3337   data = alerts@iankelling.org
3338 EOF
3339
3340
3341     for unit in ${nn_progs[@]}; do
3342       f=/etc/systemd/system/$unit.service.d/nn.conf
3343       rm -fv $f
3344     done
3345
3346     # dont i dont care if defaultnn section gets left, it wont
3347     # get used.
3348     echo | /a/exe/cedit nn /etc/hosts || [[ $? == 1 ]]
3349     echo | /a/exe/cedit mail /etc/dnsmasq-servers.conf || [[ $? == 1 ]]
3350
3351     # note: condition duplicated at else
3352     if $bhost_t; then
3353       install -d /bu
3354       install -d -g Debian-exim -o Debian-exim -m 771 /bu/md
3355       if [[ -e /bu/md/cur && $(stat -c %u /bu/md/cur) == 1000 ]]; then
3356         chown -R Debian-exim:Debian-exim /bu/md
3357       fi
3358       u /etc/exim4/conf.d/transport/30_backup_maildir <<EOF
3359 # modified debian maildir transport
3360 backup_maildir:
3361   driver = appendfile
3362   directory = /bu/md
3363   delivery_date_add
3364   # note, no return path or envelope added
3365   maildir_format
3366   directory_mode = 0700
3367   mode = 0644
3368   mode_fail_narrower = false
3369 EOF
3370
3371       u /etc/exim4/conf.d/router/165_backup_local <<'EOF'
3372 ### router/900_exim4-config_local_user
3373 #################################
3374
3375 backup_local:
3376   debug_print = "R: local_user for $local_part@$domain"
3377   driver = accept
3378   domains = eximbackup.b8.nz
3379   transport = backup_maildir
3380 EOF
3381
3382       # Bind to wghole to receive mailbackup.
3383       wgholeip=$(sed -rn 's/^ *Address *= *([^/]+).*/\1/p' /etc/wireguard/wghole.conf)
3384       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3385 dc_other_hostnames='eximbackup.b8.nz'
3386 dc_local_interfaces='127.0.0.1;::1;$wgholeip'
3387 EOF
3388
3389       # wghole & thus exim will fail to start without internet connectivity.
3390       u /etc/systemd/system/exim4.service.d/backup.conf <<'EOF'
3391 [Unit]
3392 StartLimitIntervalSec=0
3393
3394 [Service]
3395 Restart=always
3396 RestartSec=20
3397 EOF
3398
3399     else  # if $bhost_t; then
3400       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3401 # Note: If theres like a temporary problem where mail gets sent to
3402 # one of these hosts, if exim isnt listening, it will be a temporary error
3403 # instead of a permanent 5xx.
3404 dc_local_interfaces='127.0.0.1;::1'
3405 EOF
3406       rm -fv /etc/systemd/system/exim4.service.d/backup.conf
3407     fi
3408     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3409 dc_eximconfig_configtype='smarthost'
3410 dc_smarthost='$smarthost'
3411 EOF
3412
3413     hostname -f |u /etc/mailname
3414     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3415 # The manpage incorrectly states this will do header rewriting, but
3416 # that only happens if we have dc_hide_mailname is set.
3417 dc_readhost='iankelling.org'
3418 # Only used in case of bounces.
3419 dc_localdelivery='maildir_home'
3420 EOF
3421     ;;
3422 esac
3423
3424
3425
3426
3427 # ** $MAILHOST|bk, things that belong at the end
3428 case $HOSTNAME in
3429   $MAIL_HOST|bk)
3430     # config for the non-nn exim. note, it uses not default dir, but we
3431     # generate that into the default config file
3432     m rsync -ra --delete --delete-excluded \
3433       --exclude=/conf.d/router/161_backup_redir_nn \
3434       --exclude=/conf.d/router/186_sentarchive_nn \
3435       --exclude=/conf.d/main/000_local-nn /etc/exim4/ /etc/myexim4
3436     cat >>/etc/myexim4/conf.d/main/000_local <<'EOF'
3437 # this makes it easier to see which exim is doing what
3438 log_file_path = /var/log/exim4/my%s
3439 EOF
3440
3441
3442
3443     cat >/etc/logrotate.d/myexim <<'EOF'
3444 /var/log/exim4/mymain /var/log/exim4/myreject {
3445         daily
3446         missingok
3447         rotate 1000
3448         delaycompress
3449         notifempty
3450         nocreate
3451 }
3452 /var/log/exim4/mypanic {
3453         size 10M
3454         missingok
3455         rotate 10
3456         compress
3457         delaycompress
3458         notifempty
3459         nocreate
3460 }
3461 EOF
3462
3463     # If we ever wanted to have a separate spool,
3464     # we could do it like this.
3465     #     cat >>/etc/exim4/conf.d/main/000_local-nn <<'EOF'
3466     # spool_directory = /var/spool/myexim4
3467     # EOF
3468     cat >>/etc/myexim4/update-exim4.conf.conf <<'EOF'
3469 dc_eximconfig_configtype='smarthost'
3470 dc_smarthost='nn.b8.nz'
3471 EOF
3472     ;;&
3473   bk)
3474
3475     # config for the non-nn exim
3476     cat >>/etc/myexim4/conf.d/main/000_local <<'EOF'
3477 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail2.iankelling.org
3478 EOF
3479     ;;
3480   $MAIL_HOST)
3481
3482
3483     u /etc/myexim4/conf.d/router/185_sentarchive <<'EOF'
3484 sentarchive:
3485   driver = redirect
3486   domains = ! +local_domains
3487   senders = <; *@fsf.org ; *@posteo.net
3488   condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
3489   data    = vojdedIdNejyebni@b8.nz
3490   unseen
3491 EOF
3492
3493     u /etc/myexim4/conf.d/router/160_backup_redir <<'EOF'
3494 backup_redir:
3495 driver = redirect
3496 # i dont email myself from my own machine much, so lets ignore that.
3497 domains = ! +local_domains
3498 senders = <; *@fsf.org ; *@posteo.net
3499 condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
3500 # b is just an arbirary short string
3501 data = b@eximbackup.b8.nz
3502 # note, to test this, i could temporarily allow testignore.
3503 # alerts avoids potential mail loop.
3504 local_parts = ! root : ! testignore : ! alerts : ! daylert
3505 unseen = true
3506 errors_to = alerts@iankelling.org
3507 EOF
3508
3509     # for bk, we have a exim4in.service that will do this for us.
3510     m update-exim4.conf -d /etc/myexim4
3511     ;;
3512 esac
3513
3514 # * spool dir setup
3515
3516 # ** bind mount setup
3517 # put spool dir in directory that spans multiple distros.
3518 # based on http://www.postfix.org/qmgr.8.html and my notes in gnus
3519 #
3520 dir=/nocow/exim4
3521 sdir=/var/spool/exim4
3522 # we only do this if our system has $dir
3523
3524 # this used to do a symlink, but, in the boot logs, /nocow would get mounted succesfully,
3525 # about 2 seconds later, exim starts, and immediately puts into paniclog:
3526 # honVi-0000u3-82 Failed to create directory "/var/spool/exim4/input": No such file or directory
3527 # so, im trying a bind mount to get rid of that.
3528 if [[ -e /nocow ]]; then
3529   if ! grep -Fx "/nocow/exim4  /var/spool/exim4  none  bind  0 0" /etc/fstab; then
3530     echo "/nocow/exim4  /var/spool/exim4  none  bind  0 0" >>/etc/fstab
3531   fi
3532   u /etc/systemd/system/exim4.service.d/override.conf <<'EOF'
3533 [Unit]
3534 # without local-fs on exim, we get these kind of errors in paniclog on shutdown:
3535 # Failed to create spool file /var/spool/exim4//input//1jCLxz-0008V4-V9-D: Permission denied
3536 After=local-fs.target
3537
3538 [Service]
3539 ExecStartPre=/usr/local/bin/exim-nn-iptables
3540 EOF
3541   if ! mountpoint -q $sdir; then
3542     stopifactive exim4 exim4in
3543     if [[ -L $sdir ]]; then
3544       m rm $sdir
3545     fi
3546     if [[ ! -e $dir && -d $sdir ]]; then
3547       m mv $sdir $dir
3548     fi
3549     if [[ ! -d $sdir ]]; then
3550       m mkdir $sdir
3551       m chmod 000 $sdir # only want it to be used when its mounted
3552     fi
3553     m mount $sdir
3554   fi
3555 fi
3556
3557
3558
3559 # ** exim/spool uid setup
3560 # i have the spool directory be common to distro multi-boot, so
3561 # we need the uid to be the same. 608 cuz it's kind of in the middle
3562 # of the free system uids.
3563 IFS=:; read -r _ _ uid _ < <(getent passwd Debian-exim ||:) ||:; unset IFS
3564 IFS=:; read -r _ _ gid _ < <(getent group Debian-exim ||:) ||:; unset IFS
3565 if [[ ! $uid ]]; then
3566   # from /var/lib/dpkg/info/exim4-base.postinst, plus uid and gid options
3567   m adduser --uid 608 --system --group --quiet --home /var/spool/exim4 \
3568     --no-create-home --disabled-login --force-badname Debian-exim
3569 elif [[ $uid != 608 ]]; then
3570   stopifactive exim4 exim4in
3571   m usermod -u 608 Debian-exim
3572   m groupmod -g 608 Debian-exim
3573   m usermod -g 608 Debian-exim
3574   m find / /nocow -xdev -path ./var/tmp -prune -o -uid $uid -execdir chown -h 608 {} +
3575   m find / /nocow -xdev -path ./var/tmp -prune -o -gid $gid -execdir chgrp -h 608 {} +
3576 fi
3577
3578 # * start / stop services
3579
3580 reifactive dnsmasq nscd
3581
3582 if $reload; then
3583   m systemctl daemon-reload
3584 fi
3585
3586 # optimization, this only needs to run once.
3587 if [[ ! -e /sys/class/net/wghole ]]; then
3588   # checking bhost_t is redundant, but could help us catch errors.
3589   if $bhost_t || [[ -e /etc/wireguard/wghole.conf ]]; then
3590     # todo: in mail-setup, we have a static list of backup hosts, not *y
3591     m systemctl --now enable wg-quick@wghole
3592   fi
3593 fi
3594
3595 # optimization, this only needs to be run once
3596 if [[ ! -e /var/lib/prometheus/node-exporter/exim_paniclog.prom ]]; then
3597   sysd-prom-fail-install epanicclean
3598   m systemctl --now enable epanicclean
3599 fi
3600
3601 case $HOSTNAME in
3602   je)
3603     /a/exe/web-conf apache2 je.b8.nz
3604     ;;
3605   bk)
3606     /a/exe/web-conf apache2 mail2.iankelling.org
3607     ;;
3608 esac
3609
3610 # optimization, this only needs to run once.
3611 if [[ ! -e /etc/exim4/fullchain.pem ]]; then
3612   m /a/bin/ds/mail-cert-cron -1
3613   m systemctl --now enable mailcert.timer
3614 fi
3615
3616 case $HOSTNAME in
3617   $MAIL_HOST|bk)
3618     m systemctl --now enable mailnn mailnnroute
3619     ;;&
3620   $MAIL_HOST)
3621     # we use dns to start wg
3622     if $reload; then
3623       sre unbound
3624     else
3625       m systemctl --now enable unbound
3626     fi
3627     ;;&
3628   $MAIL_HOST|bk)
3629     # If these have changes, id rather manually restart it, id rather
3630     # not restart and cause temporary errors
3631     if $reload; then
3632       sre $vpnser
3633     else
3634       m systemctl --now enable $vpnser
3635     fi
3636     ;;&
3637   bk)
3638     if ! systemctl is-active clamav-daemon >/dev/null; then
3639       m systemctl --now enable clamav-daemon
3640       out=$(rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/filesystem/etc/systemd/system/epanicclean.service /etc/systemd/system)
3641       if [[ $out ]]; then
3642         reload=true
3643       fi
3644
3645       # note, this will cause paniclog entries because it takes like 45
3646       # seconds for clamav to start, i use ./epanic-clean to remove
3647       # them.
3648     fi
3649     ;;&
3650   $MAIL_HOST|bk|je)
3651     # start spamassassin/dovecot before exim.
3652     sre dovecot spamassassin
3653     # Wait a bit before restarting exim, else I get a paniclog entry
3654     # like: spam acl condition: all spamd servers failed. But I'm tired
3655     # of waiting. I'll deal with this some other way.
3656     #
3657     # sleep 3
3658     m systemctl --now enable mailclean.timer
3659     ;;&
3660   $MAIL_HOST)
3661     # < 2.1 (eg: in t9), uses a different data format which required manual
3662     # migration. dont start if we are running an old version.
3663     if dpkg --compare-versions "$(dpkg -s radicale | awk '$1 == "Version:" { print $2 }')" ge 2.1; then
3664       m systemctl --now enable radicale
3665     fi
3666     ;;&
3667 esac
3668
3669 # for debugging dns issues
3670 case $HOSTNAME in
3671   je|bk)
3672     systemctl enable --now logrotate-fast.timer
3673     ;;
3674 esac
3675
3676 # last use of $reload happens in previous block
3677 rm -f /var/local/mail-setup-reload
3678
3679
3680 case $HOSTNAME in
3681   $MAIL_HOST|bk|je|li)
3682     # on li, these are never started, except $vpnser
3683     :
3684     ;;
3685   *)
3686     soff radicale mailclean.timer dovecot spamassassin $vpnser mailnn clamav-daemon
3687     ;;
3688 esac
3689
3690 sre exim4
3691
3692 case $HOSTNAME in
3693   $MAIL_HOST)
3694     m systemctl --now enable mailbindwatchdog
3695     ;;
3696   *)
3697     soff mailbindwatchdog
3698     ;;
3699 esac
3700
3701
3702 case $HOSTNAME in
3703   bk) sre exim4in ;;
3704 esac
3705
3706 # * mail monitoring / testing
3707
3708 # note, to test clamav, send an email with body that only contains
3709 # https://en.wikipedia.org/wiki/EICAR_test_file
3710 # which set malware_name to Eicar-Signature
3711 case $HOSTNAME in
3712   $MAIL_HOST|bk|je)
3713     # note: cronjob "ian" also does some important monitoring
3714     # todo: this will sometimes cause an alert because mailtest-check will run
3715     # before we have setup network namespace and spamassassin
3716     u /etc/cron.d/mailtest <<EOF
3717 SHELL=/bin/bash
3718 PATH=/usr/bin:/bin:/usr/local/bin
3719 MAILTO=daylert@iankelling.org
3720 */5  * * * *   $u send-test-forward |& log-once send-test-forward
3721 */10 * * * *   root chmod -R g+rw /m/md/bounces |& log-once -1 bounces-chmod
3722 # if a bounce happened yesterday, dont let it slip through the cracks
3723 8   1 * * *   root export MAILTO=alerts@iankelling.org; [[ -s /var/log/exim4/mainlog.1 ]] && awk '\$5 == "**"' /var/log/exim4/mainlog.1
3724 EOF
3725
3726
3727     m sudo rsync -ahhi --chown=root:root --chmod=0755 \
3728       /b/ds/mailtest-check /b/ds/check-remote-mailqs /usr/local/bin/
3729     u /etc/systemd/system/mailtest-check.service <<'EOF'
3730 [Unit]
3731 Description=mailtest-check
3732 After=local-fs.target
3733 StartLimitIntervalSec=0
3734
3735 [Service]
3736 Type=simple
3737 ExecStart=/usr/local/bin/mailtest-check slow
3738 Restart=always
3739 RestartSec=60
3740
3741 [Install]
3742 WantedBy=graphical.target
3743 EOF
3744     sysd-prom-fail-install mailtest-check
3745     sre mailtest-check
3746     ;;&
3747   $MAIL_HOST)
3748     test_froms=(ian@iankelling.org z@zroe.org iank@gnu.org)
3749     test_tos=(testignore@expertpathologyreview.com testignore@je.b8.nz testignore@amnimal.ninja jtuttle@gnu.org)
3750
3751     cat >>/etc/cron.d/mailtest <<EOF
3752 # 10 am friday
3753 0   10 * * 5  root echo "weekly alert. You are not in the matrix."
3754 2   * * * *   root check-remote-mailqs |& log-once check-remote-mailqs
3755 EOF
3756     ;;&
3757   bk)
3758     test_froms=(testignore@amnimal.ninja testignore@expertpathologyreview.com)
3759     test_tos=(testignore@iankelling.org testignore@je.b8.nz)
3760     # We dont need to send from different addresses to the same
3761     # address. this breaks down our nice elegant logic of building up
3762     # froms and tos , so I just handle expertpath in a special case
3763     # below and set the to: to be testignore@zroe.org.  If we did sent
3764     # that way, it would also mess up our mailtest-check logic that
3765     # finds which messages to check.
3766     # for example: from testignore@amnimal.ninja to: testignore@iankelling.org testignore@zroe.org
3767     # that would become 2 messages and we'd only check 1.
3768     ;;&
3769   je)
3770     test_froms=(testignore@je.b8.nz)
3771     test_tos=(testignore@iankelling.org testignore@zroe.org testignore@expertpathologyreview.com testignore@amnimal.ninja)
3772     ;;&
3773   $MAIL_HOST|bk|je)
3774
3775     # Dont put these test messages into the sent folder or else it will
3776     # overwhelm it, plus i dont want to save a copy at all.
3777     # Plus addresses we generally want to ignore.
3778     u /etc/exim4/ignore-sent <<EOF
3779 $(printf "%s\n" ${test_tos[@]})
3780 vojdedIdNejyebni@b8.nz
3781 b@eximbackup.b8.nz
3782 EOF
3783
3784     cat >/usr/local/bin/send-test-forward <<'EOF'
3785 #!/bin/bash
3786 # we remove from the queue older than 4.3 minutes since we send every 5 minutes.
3787 olds=(
3788 $(/usr/sbin/exiqgrep -o 260 -i -r '^(testignore@(iankelling\.org|zroe\.org|expertpathologyreview\.com|amnimal\.ninja|je\.b8\.nz)|jtuttle@gnu\.org)$')
3789 )
3790 if (( ${#olds[@]} )); then
3791   /usr/sbin/exim -Mrm "${olds[@]}" >/dev/null
3792 fi
3793 EOF
3794     for test_from in ${test_froms[@]}; do
3795
3796       test_to=${test_tos[0]}
3797       for t in ${test_tos[@]:1}; do
3798         if [[ $test_from == *@gnu.org && $t == *@gnu.org ]]; then
3799           continue
3800         fi
3801         test_to+=", $t"
3802       done
3803       case $test_from in
3804         testignore@expertpathologyreview.com)
3805           test_to=testignore@zroe.org
3806           ;;
3807       esac
3808
3809       cat >>/usr/local/bin/send-test-forward <<EOFOUTER
3810 /usr/sbin/exim -odf -f $test_from -t <<EOF
3811 From: $test_from
3812 To: $test_to
3813 Subject: test \$(date +%Y-%m-%dT%H:%M:%S%z) \$EPOCHSECONDS
3814
3815 /usr/local/bin/send-test-forward
3816 EOF
3817 EOFOUTER
3818     done
3819     m chmod +x /usr/local/bin/send-test-forward
3820     ;;
3821   *)
3822     soff mailtest-check.service
3823     rm -fv /etc/cron.d/mailtest \
3824        /var/lib/prometheus/node-exporter/mailtest-check.prom* \
3825        /var/local/cron-errors/check-remote-mailqs*
3826     ;;
3827 esac
3828
3829
3830
3831 # * misc
3832 m sudo -u $u mkdir -p /home/$u/.cache
3833 set -- /m/mucache /home/$u/.cache/mu /m/.mu /home/$u/.mu
3834 while (($#)); do
3835   target=$1
3836   f=$2
3837   shift 2
3838   if [[ ! -L $f ]]; then
3839     if [[ -e $f ]]; then
3840       rm -rf $f
3841     fi
3842     m sudo -u $u ln -sf -T $target $f
3843   fi
3844 done
3845
3846
3847 # /etc/alias setup is debian specific, and exim postinst script sets up
3848 # an /etc/alias from root to the postmaster, based on the question
3849 # exim4-config exim4/dc_postmaster, as long as there exists an entry for
3850 # root, or there was no preexisting aliases file. postfix won\'t set up
3851 # a root to $postmaster alias if it\'s already installed. Easiest to
3852 # just set it ourselves.
3853
3854 # debconf question for postmaster:
3855 # Mail for the 'postmaster', 'root', and other system accounts needs to be redirected
3856 # to the user account of the actual system administrator.
3857 # If this value is left empty, such mail will be saved in /var/mail/mail, which is not
3858 # recommended.
3859 # Note that postmaster\'s mail should be read on the system to which it is directed,
3860 # rather than being forwarded elsewhere, so (at least one of) the users listed here
3861 # should not redirect their mail off this machine. A 'real-' prefix can be used to
3862 # force local delivery.
3863 # Multiple user names need to be separated by spaces.
3864 # Root and postmaster mail recipient:
3865
3866 m exit 0
3867 :
3868
3869 # Local Variables:
3870 # eval: (outline-minor-mode)
3871 # outline-regexp: "\\( *\\)# [*]\\{1,8\\} "
3872 # End:
3873 # this is combined with defining outline-level in init.el