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 # eximbackup folder is /bu/md
  17 # it is cleaned up by mail-backup-clean, which is run by btrbk-run
  18
  19 # shellcheck disable=SC2254 # makes for a lot of unneeded quotes
  20
  21
  22 # perusing through /el/mainlog without test messages:
  23 # &!testignore|jtuttle|
  24 #
  25 #&! testignore|jtuttle|eximbackup|/usr/sbin/exim4 -bpu
  26
  27 # todo: check new macro DKIM_TIMESTAMPS
  28
  29 # todo: check if REMOTE_SMTP_INTERFACE or REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE can simplify my or fsfs config
  30
  31 # todo: max line length macro changed in t11. look into it
  32 # todo: check that all macros we use are still valid in t11
  33
  34 # todo: setup an alert for bouncing test emails.
  35
  36 # todo: bounces to my fsf mail can come from fsf@iankelling.org,
  37 # think about making bounces go from the original address.
  38
  39 # todo: add a prometheus alert for dovecot.
  40
  41 # todo: handle errors like this:
  42 # Mar 02 12:44:26 kw systemd[1]: exim4.service: Found left-over process 68210 (exim4) in control group while starting unit. Ignoring.
  43 # Mar 02 12:44:26 kw systemd[1]: This usually indicates unclean termination of a previous run, or service implementation deficiencies.
  44 #eg: on eggs, on may 1st, ps grep for exim, 2 daemons running. 1 leftover from a month ago
  45 #Debian-+  1954     1  0 36231 11560   4 Apr02 ?        00:40:25 /usr/sbin/exim4 -bd -q30m
  46 #Debian-+ 23058  1954  0 36821 10564   0 20:38 ?        00:00:00 /usr/sbin/exim4 -bd -q30m
  47
  48 #  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.
  49 #  todo: consider hardening cups listening on 0.0.0.0
  50 #  todo: stop/disable local apache, and rpc.mountd, and kdeconnect when not in use.
  51
  52 # todo:  hosts should only allow external mail that is authed and
  53 # destined for backup route. it is a minor issue since traffic is
  54 # limited to the wghole network.
  55
  56 # todo: emailing info@amnimal.ninja produces a bounce, user doesn't exist
  57 # instead of a simple rejection like it should.
  58
  59 # todo: run mailping test after running, or otherwise
  60 # clear out terminal alert
  61
  62 # todo: disable postgrey
  63
  64 # todo: in testforward-check, we should also look
  65
  66 # todo: test that bounces dont help create valid mailtest-check
  67
  68 # todo: move mail stuff in distro-end into this file
  69
  70 # todo: consider rotating dkim & publishing key so every past email I sent
  71 # isnt necessarily signed
  72
  73 # todo: consider how to get clamav out of Debian-exim group
  74 # so it cant read/write the whole mail spool, for better
  75 # security.
  76
  77 # todo: create a cronjob to update or warn on expiring dnssec keys
  78
  79 # todo: we should test failed mail daily or so
  80 # failed cronjob, failed sysd-log-once,
  81 # a local bounce from a cronjob, a local bounce
  82 # to a bad remote address, perhaps a local failure
  83 # when the sending daemon is down.
  84 # And send an alert email if no alerts have been sent
  85 # in 2 or 3 days or something. todo, test cron mail on li.
  86
  87 # todo: look at mailinabox extra dns records, note these changelogs:
  88 # - 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.
  89 # - 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.
  90 #
  91
  92 # todo: mailtest-check failure on remote hosts is not going to alert me.
  93 # sort that out.
  94 # todo: test mail failure as well as success.
  95 #
  96 # todo: validate that mailtest-check is doing dnsbl checks.
  97
  98 # background: I want to run exim in a network namespace so it can send
  99 # and receive through a vpn. This is needed so it can do ipv6, because
 100 # outside the namespace if we dont have ipv6, to send ipv6 through the
 101 # vpn, we have to send all our ipv6 through the vpn. I did this for a
 102 # long time, it was fine, but it causes various pains, like increased
 103 # latency, increased recaptcha because my ip is from a data center, just
 104 # various issues I dont want on all the time. The problem with the
 105 # namespace is that all kinds of programs want to invoke exim, but they
 106 # wont be in the namespace. I could replace exim with a wrapper that
 107 # jumps into the namespace, i tried that, it works fine.  One remaining
 108 # problem was that I would have needed to hook into exim upgrades to
 109 # move exim and replace it with my wrapper script. Also, my script to
 110 # join the namespace is not super reliable because it uses a pgrep.
 111 # Instead, I should have created a systemd service for a process that
 112 # will never die and just writes its pid somewhere convenient.
 113 # That implementation
 114 # is below here:
 115 #
 116 # sudoers:
 117 # user ALL=(ALL) /usr/sbin/exim4
 118 #
 119 # move exim4 to eximian, use this script for exim4:
 120 #
 121 # #!/bin/bash
 122 # if ip a show veth1-mail &>/dev/null; then
 123 #   /usr/sbin/eximian "$@"
 124 #   exit
 125 # fi
 126 # dosudo=false
 127 # if [[ $USER && $USER != root ]]; then
 128 #   dosudo=true
 129 # fi
 130 # pid=$(pgrep -f "/usr/sbin/openvpn .* --config /etc/openvpn/.*mail.conf")
 131 # if $dosudo; then
 132 #   sudo nsenter -t $pid -n -m sudo -u $USER /usr/sbin/eximian "$@"
 133 # else
 134 #   nsenter -t $pid -n -m /usr/sbin/eximian "$@"
 135 # fi
 136 # ## end script
 137 #
 138 # an alternate solution: there is a small setguid program for
 139 # network namespaces in my bookmarks.
 140 #
 141 # However, the solution I went with is: have 2 exim
 142 # configs. A nonstandard location for the daemon that runs
 143 # in the namespace. For all other invocations, it uses
 144 # the default config location, which is altered to be
 145 # in a smarthost config which sends mail to the deaemon.
 146 #
 147 # I have a bash function, enn to invoke exim like the daemon is running.
 148 # and mailbash to just enter its network namespace.
 149
 150 if [ -z "$BASH_VERSION" ]; then echo "error: shell is not bash" >&2; exit 1; fi
 151
 152 shopt -s nullglob
 153
 154 if [[ -s /usr/local/lib/err ]]; then
 155   source /usr/local/lib/err
 156 elif [[ -s /a/bin/errhandle/err ]]; then
 157   source /a/bin/errhandle/err
 158 else
 159   echo "no err tracing script found"
 160   exit 1
 161 fi
 162 source /a/bin/distro-functions/src/identify-distros
 163 source /a/bin/distro-functions/src/package-manager-abstractions
 164
 165 # has nextcloud_admin_pass in it
 166 f=/p/c/machine_specific/$HOSTNAME/mail
 167 if [[ -e $f ]]; then
 168   # shellcheck source=/p/c/machine_specific/bk/mail
 169   source $f
 170 fi
 171
 172
 173 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
 174
 175 # note, this is hardcoded in /etc/exim4/conf.d/main/000_local
 176 u=$(id -nu 1000)
 177
 178
 179 usage() {
 180   cat <<EOF
 181 Usage: ${0##*/} anything_here_to_debug
 182 Setup exim4 & dovecot & related things
 183
 184 -h|--help  Print help and exit.
 185 EOF
 186   exit $1
 187 }
 188
 189 # debug output if we pass any arg
 190 if (( $# )); then
 191   set -x
 192 fi
 193
 194
 195 ####### instructions for icedove #####
 196 # Incoming mail server: mail.iankelling.org, port 143, username iank, connection security starttls, authentication method normal password,
 197 # then click advanced so it accepts it.
 198 # we could also just use 127.0.0.1 with no ssl
 199 #
 200 # hamburger -> preferences -> preferences -> advanced tab -> config editor button -> security.ssl.enable_ocsp_must_staple = false
 201 # background: dovecot does not yet have ocsp stapling support
 202 # reference: https://community.letsencrypt.org/t/simple-guide-using-lets-encrypt-ssl-certs-with-dovecot/2921
 203 #
 204 # for phone, k9mail, fdroid, same thing but username alerts, pass in ivy-pass.
 205 # also, bk.b8.nz for secondary alerts, username is iank. same alerts pass.
 206 # fetching mail settings: folder poll frequency 10 minutes.
 207 # account settings, fetching mail, push folders: All. Then disable the persistent notification.
 208 #######
 209
 210
 211 # * perstent password instructions
 212 # Note: for cert cron, we need to manually run first to accept known_hosts
 213
 214 # # exim passwords:
 215 # # for hosts which have all private files I just use the same user
 216 # # for other hosts, each one get\'s their own password.
 217 # # for generating secure pass, and storing for server too:
 218 # f=$(mktemp)
 219 # host=tp
 220 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$f
 221 # s sed -i "/^$host:/d" /p/c/filesystem/etc/exim4/passwd
 222 # echo "$host:$(mkpasswd -m sha-512 -s <$f)" >>/p/c/filesystem/etc/exim4/passwd
 223 # #reference: exim4_passwd_client(5)
 224 # dir=/p/c/machine_specific/$host/filesystem/etc/exim4
 225 # mkdir -p $dir
 226 # echo "mail.iankelling.org:$host:$(<$f)" > $dir/passwd.client
 227 # # then run this script
 228
 229 # # dovecot password, i just need 1 as I\'m the only user
 230 # mkdir /p/c/filesystem/etc/dovecot
 231 # echo "iank:$(doveadm pw -s SHA512-CRYPT)::::::" >>/p/c/filesystem/etc/dovecot/users
 232
 233 ####### end perstent password instructions ######
 234
 235
 236 # * dkim dns
 237 # # Remove 1 level of comments in this section, set the domain var
 238 # # for the domain you are setting up, then run this and copy dns settings
 239 # # into dns.
 240 # domain=iankelling.org
 241 # c /p/c/filesystem/etc/exim4
 242 # # this has several bugs addressed in comments, but it was helpful
 243 # # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
 244
 245 # openssl genrsa -out $domain-private.pem 2048
 246 # # Then, to get the public key strings to put in bind:
 247
 248 # # selector is needed for having multiple keys for one domain.
 249 # # I dun do that, so just use a static one: li
 250 # # Debadmin page does not have v=, fastmail does, and this
 251 # # says it\'s recommended in 3.6.1, default is DKIM1 anyways.
 252 # # https://www.ietf.org/rfc/rfc6376.txt
 253 # # Join and print all but first and last line.
 254 # # last line: swap hold & pattern, remove newlines, print.
 255 # # lines 2+: append to hold space
 256 # echo "bind txt record: remember to truncate $domain so its relative to the bind zone"
 257 # cat <<EOF
 258 # a._domainkey.$domain  TXT     (
 259 # "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')" )
 260 # EOF
 261 # # sed explanation: skip the first few lines, then put them into the hold space, then
 262 # # on the last line, back to the patern space, remove the newlines, then add a newline
 263 # # at the last char - 240, because bind txt records need strings <=255 chars,
 264 # # other dkim stuff at the begining is is 25 chars, and the pubkey is 393, so this
 265 # # leaves us a bit of extra room at the end and a bunch at the beginning.
 266
 267 # # selector was also put into /etc/exim4/conf.d/main/000_local,
 268
 269 # * dmarc dns
 270
 271 # # 2017-02 dmarc policies:
 272 # # host -t txt _dmarc.gmail.com
 273 # # yahoo: p=reject, hotmail: p=none, gmail: p=none, fastmail none for legacy reasons
 274 # # there were articles claiming gmail would be  changing
 275 # # to p=reject, in early 2017, which didn\'t happen. I see no sources on them. It\'s
 276 # # expected to cause problems
 277 # # with a few old mailing lists, copying theirs for now.
 278 #
 279 # echo "dmarc dns, name: _dmarc value: v=DMARC1; p=none; rua=mailto:mailauth-reports@$domain"
 280
 281 # * other dns
 282
 283 # # 2017-02 spf policies:
 284 # # host -t txt lists.fedoraproject.org
 285 # # google ~all, hotmail ~all, yahoo: ?all, fastmail ?all, outlook ~all
 286 # # i include fastmail\'s settings, per their instructions,
 287 # # and follow their policy. In mail in a box, or similar instructions,
 288 # # I\'ve seen recommended to not use a restrictive policy.
 289
 290 # # to check if dns has updated, you do
 291 # host -a mesmtp._domainkey.$domain
 292
 293 # # mx records,
 294 # # setting it to iankelling.org would work the same, but this
 295 # # is more flexible, I could change where mail.iankelling.org pointed.
 296 # cat <<'EOF'
 297 # mx records, 2 records each, for * and empty domain
 298 # pri 10 mail.iankelling.org
 299 # EOF
 300
 301 # # dnssec
 302 # from brc2, run dnsecgen then dsign, update named.local.conf, publish keys to registrar
 303
 304 # * functions & constants
 305
 306 pre="${0##*/}:"
 307 m() { printf "$pre %s\n"  "$*"; "$@"; }
 308 e() { printf "$pre %s\n"  "$*"; }
 309 err() { printf "$pre %s\n"  "$*" >&2; exit 1; }
 310
 311 reload=false
 312 # This file is so if we fail in the middle and rerun, we dont lose state
 313 if [[ -e /var/local/mail-setup-reload ]]; then
 314   reload=true
 315 fi
 316 u() { # update file. note: duplicated in brc
 317   local tmp tmpdir dest="$1"
 318   local base="${dest##*/}"
 319   local dir="${dest%/*}"
 320   if [[ $dir != "$base" ]]; then
 321     # dest has a directory component
 322     mkdir -p "$dir"
 323   fi
 324   ur=false # u result
 325   tmpdir=$(mktemp -d)
 326   cat >$tmpdir/"$base"
 327   tmp=$(rsync -ic $tmpdir/"$base" "$dest")
 328   if [[ $tmp ]]; then
 329     printf "%s\n" "$tmp"
 330     ur=true
 331     if [[ $dest == /etc/systemd/system/* ]]; then
 332       touch /var/local/mail-setup-reload
 333       reload=true
 334     fi
 335   fi
 336   rm -rf $tmpdir
 337 }
 338 setini() {
 339   key="$1" value="$2" section="$3"
 340   file="/etc/radicale/config"
 341   sed -ri "/ *\[$section\]/,/^ *\[[^]]+\]/{/^\s*${key}[[:space:]=]/d};/ *\[$section\]/a $key = $value" "$file"
 342 }
 343 soff () {
 344   for service; do
 345     # ignore services that dont exist
 346     if systemctl cat $service &>/dev/null; then
 347       m systemctl disable --now $service
 348     fi
 349   done
 350 }
 351 sre() {
 352   local enabled
 353   for service; do
 354     m systemctl restart $service
 355     # Optimization for exim,
 356     # is-enabled: 0m0.015s
 357     # enable: 0m0.748s
 358     # It is related to this message:
 359     # exim4.service is not a native service, redirecting to systemd-sysv-install.
 360     # Executing: /lib/systemd/systemd-sysv-install enable exim4
 361     enabled=$(systemctl is-enabled $service 2>/dev/null ||:)
 362     if [[ $enabled != enabled ]]; then
 363       m systemctl enable $service
 364     fi
 365   done
 366 }
 367 mailhost() {
 368   [[ $HOSTNAME == "$MAIL_HOST" ]]
 369 }
 370 e() { printf "%s\n" "$*"; }
 371 reifactive() {
 372   for service; do
 373     if systemctl is-active $service >/dev/null; then
 374       m systemctl restart $service
 375     fi
 376   done
 377 }
 378 stopifactive() {
 379   for service; do
 380     if systemctl is-active $service >/dev/null; then
 381       m systemctl stop $service
 382     fi
 383   done
 384 }
 385
 386 mxhost=mx.iankelling.org
 387 mxport=587
 388
 389 # old setup. left as comment for example
 390 # mxhost=mail.messagingengine.com
 391 # mxport=587
 392 # forward=ian@iankelling.org
 393
 394 smarthost="$mxhost::$mxport"
 395 uhome=$(eval echo ~$u)
 396
 397 # Somehow on one machine, a file got written with 664 perms.
 398 # just being defensive here.
 399 umask 0022
 400
 401 source /a/bin/bash_unpublished/source-state
 402 if [[ ! $MAIL_HOST ]]; then
 403   err "\$MAIL_HOST not set"
 404 fi
 405
 406 bhost_t=false
 407 case $HOSTNAME in
 408   $MAIL_HOST) : ;;
 409   kd|frodo|x2|x3|kw|sy|bo)
 410     bhost_t=true
 411     ;;
 412 esac
 413
 414
 415 # * Install universal packages
 416
 417
 418 # installs epanicclean iptables-exim ip6tables-exim
 419 /a/bin/ds/install-my-scripts
 420
 421 if [[ $(debian-codename-compat) == bionic ]]; then
 422   cat >/etc/apt/preferences.d/spamassassin <<'EOF'
 423 Package: spamassassin sa-compile spamc
 424 Pin: release n=focal,o=Ubuntu
 425 Pin-Priority: 500
 426 EOF
 427 fi
 428
 429 # light version of exim does not have sasl auth support.
 430 # note: for bitfolk hosts, unbound has important config with conflink.
 431 pi-nostart exim4 exim4-daemon-heavy spamassassin unbound clamav-daemon wireguard
 432
 433 # note: pyzor debian readme says you need to run some initialization command
 434 # but its outdated.
 435 pi spf-tools-perl p0f postgrey pyzor razor jq moreutils certbot fail2ban
 436 case $HOSTNAME in
 437   je) : ;;
 438   # not included due to using wireguard: openvpn
 439   *) pi wget git unzip iptables ;;
 440 esac
 441 # bad packages that sometimes get automatically installed
 442 pu openresolv resolvconf
 443
 444 soff openvpn
 445
 446
 447 if [[ $(debian-codename) == etiona ]]; then
 448   # ip6tables stopped loading on boot. openvpn has reduced capability set,
 449   # so running iptables as part of openvpn startup wont work. This should do it.
 450   pi iptables-persistent
 451   cat >/etc/iptables/rules.v6 <<'EOF'
 452 *mangle
 453 COMMIT
 454 *nat
 455 COMMIT
 456 EOF
 457   # load it now.
 458   m ip6tables -S >/dev/null
 459 fi
 460
 461 # our nostart pi fails to avoid enabling
 462
 463
 464 # * Mail clean cronjob
 465
 466 u /etc/systemd/system/mailclean.timer <<'EOF'
 467 [Unit]
 468 Description=Run mailclean daily
 469
 470 [Timer]
 471 OnCalendar=monthly
 472
 473 [Install]
 474 WantedBy=timers.target
 475 EOF
 476
 477 u /etc/systemd/system/mailclean.service <<EOF
 478 [Unit]
 479 Description=Delete and archive old mail files
 480 After=multi-user.target
 481
 482 [Service]
 483 User=$u
 484 Type=oneshot
 485 ExecStart=/usr/local/bin/sysd-mail-once mailclean /a/bin/distro-setup/mailclean
 486 EOF
 487
 488 # * postgrey
 489
 490
 491 u /etc/default/postgrey <<'EOF'
 492 POSTGREY_OPTS="--exim --unix=/var/run/postgrey/postgrey.sock --retry-window=4 --max-age=60"
 493 EOF
 494
 495 # * clamav
 496
 497 m usermod -a -G Debian-exim clamav
 498
 499 u /etc/systemd/system/clamav-daemon.service.d/fix.conf <<EOF
 500 [Service]
 501 ExecStartPre=-/bin/mkdir -p /var/run/clamav
 502 ExecStartPre=/bin/chown clamav /var/run/clamav
 503 EOF
 504
 505 # * mail vpn config
 506
 507 # old.
 508 #vpnser=mailvpn.service
 509 # note: this hangs if it cant resolv the endpoint. we
 510 # want it to just retry in the background. i just use a static ip instead.
 511 #
 512 # Note: at least on t10, on reboot, the service fails to come up according to systemd, but
 513 # in reality it is up and working, then it tries to restart infinitely, and fails
 514 # because it detects that the interface exists.
 515 #
 516 # failing output:
 517 #
 518 # Aug 02 21:59:27 sy wg-quick[2092]: [#] sysctl -q net.ipv4.conf.all.src_valid_mark=1
 519 # Aug 02 21:59:27 sy wg-quick[2248]: [#] iptables-restore -n
 520 # 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?
 521 # Aug 02 21:59:27 sy wg-quick[2259]: [#] iptables-restore -n
 522 # 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?
 523 # Aug 02 21:59:27 sy systemd[1]: wg-quick@wgmail.service: Main process exited, code=exited, status=4/NOPERMISSION
 524
 525
 526 # successful output.
 527 # Aug 03 14:12:47 sy wg-quick[711336]: [#] sysctl -q net.ipv4.conf.all.src_valid_mark=1
 528 # Aug 03 14:12:47 sy wg-quick[711384]: [#] iptables-restore -n
 529 # Aug 03 14:12:47 sy wg-quick[711336]: [#] ping -w10 -c1 10.8.0.1 ||:
 530 # Aug 03 14:12:47 sy wg-quick[711389]: PING 10.8.0.1 (10.8.0.1) 56(84) bytes of data.
 531 # 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
 532 # Aug 03 14:12:47 sy wg-quick[711389]: --- 10.8.0.1 ping statistics ---
 533 # Aug 03 14:12:47 sy wg-quick[711389]: 1 packets transmitted, 1 received, 0% packet loss, time 0ms
 534 # Aug 03 14:12:47 sy wg-quick[711389]: rtt min/avg/max/mdev = 72.993/72.993/72.993/0.000 ms
 535 # Aug 03 14:12:47 sy systemd[1]: Finished WireGuard via wg-quick(8) for wgmail.
 536 # Aug 02 21:59:27 sy systemd[1]: wg-quick@wgmail.service: Failed with result 'exit-code'.
 537 # Aug 02 21:59:27 sy systemd[1]: Failed to start WireGuard via wg-quick(8) for wgmail.
 538 # Aug 02 21:59:47 sy systemd[1]: wg-quick@wgmail.service: Scheduled restart job, restart counter is at 1.
 539 # Aug 02 21:59:47 sy systemd[1]: Stopped WireGuard via wg-quick(8) for wgmail.
 540 # Aug 02 21:59:47 sy systemd[1]: Starting WireGuard via wg-quick(8) for wgmail...
 541 # Aug 02 21:59:47 sy wg-quick[3424]: wg-quick: `wgmail' already exists
 542 # Aug 02 21:59:47 sy systemd[1]: wg-quick@wgmail.service: Main process exited, code=exited, status=1/FAILURE
 543 # Aug 02 21:59:47 sy systemd[1]: wg-quick@wgmail.service: Failed with result 'exit-code'.
 544 # Aug 02 21:59:47 sy systemd[1]: Failed to start WireGuard via wg-quick(8) for wgmail.
 545
 546
 547 # According to iptables -S and iptables -t nat -S,
 548 # there are no modifications to iptables rules on a succsfull run,
 549 # and
 550
 551 vpnser=wg-quick@wgmail.service
 552
 553 case $HOSTNAME in
 554   $MAIL_HOST)
 555     rsync -aiSAX --chown=root:root --chmod=g-s /p/c/filesystem/etc/wireguard/ /etc/wireguard
 556     bindpaths="/etc/127.0.0.1-resolv:/run/systemd/resolve /etc/basic-nsswitch:/etc/resolved-nsswitch:norbind"
 557     ;;&
 558   bk)
 559     bindpaths="/etc/10.173.8.1-resolv:/etc/127.0.0.1-resolv"
 560     ;;&
 561   *)
 562     d=/p/c/machine_specific/$HOSTNAME/filesystem/etc/wireguard/
 563     if [[ -d $d ]]; then
 564       rsync -aiSAX --chown=root:root --chmod=g-s $d  /etc/wireguard
 565     fi
 566     ;;
 567 esac
 568
 569 case $HOSTNAME in
 570   li) : ;;
 571   *)
 572     u /etc/systemd/system/wg-quick@wgmail.service.d/override.conf <<EOF
 573 [Unit]
 574 Requires=mailnn.service
 575 JoinsNamespaceOf=mailnn.service
 576 BindsTo=mailnn.service
 577 StartLimitIntervalSec=0
 578
 579 [Service]
 580 PrivateNetwork=true
 581 # i dont think we need any of these, but it doesnt hurt to stay consistent
 582 BindPaths=$bindpaths
 583
 584 Restart=on-failure
 585 RestartSec=20
 586 EOF
 587     ;;
 588 esac
 589
 590
 591 # https://selivan.github.io/2017/12/30/systemd-serice-always-restart.html
 592 u /etc/systemd/system/mailvpn.service <<EOF
 593 [Unit]
 594 Description=OpenVPN tunnel for mail
 595 After=syslog.target network-online.target mailnn.service
 596 Wants=network-online.target
 597 Documentation=man:openvpn(8)
 598 Documentation=https://community.openvpn.net/openvpn/wiki/Openvpn24ManPage
 599 Documentation=https://community.openvpn.net/openvpn/wiki/HOWTO
 600 # needed to continually restatr
 601 JoinsNamespaceOf=mailnn.service
 602 BindsTo=mailnn.service
 603 StartLimitIntervalSec=0
 604
 605 [Service]
 606 Type=notify
 607 RuntimeDirectory=openvpn-client
 608 RuntimeDirectoryMode=0710
 609 WorkingDirectory=/etc/openvpn/client
 610 ExecStart=/usr/sbin/openvpn --suppress-timestamps --nobind --config /etc/openvpn/client/mail.conf
 611 #CapabilityBoundingSet=CAP_IPC_LOCK CAP_NET_ADMIN CAP_NET_RAW CAP_SETGID CAP_SETUID CAP_SYS_CHROOT CAP_DAC_OVERRIDE
 612 LimitNPROC=10
 613 # DeviceAllow=/dev/null rw
 614 # DeviceAllow=/dev/net/tun rw
 615 PrivateNetwork=true
 616 # in the network namespace, we cant connect to systemd-resolved on 127.0.0.53,
 617 # because of
 618 # https://unix.stackexchange.com/questions/445782/how-to-allow-systemd-resolved-to-listen-to-an-interface-other-than-loopback
 619 # there is a workaround there, but i dont think its really worth it,
 620 # the mail server is fine with a static dns anyways.
 621 # This thread is also interesting,
 622 # https://github.com/slingamn/namespaced-openvpn/issues/7
 623 # todo: the iptables rule at the bottom could be useful to prevent
 624 # dns from leaking in my network namespaced vpn.
 625 # I also like the idea of patching systemd-resolved so it
 626 # will listen on other interfaces, but its not worth my time.
 627 BindPaths=$bindpaths
 628 Restart=always
 629 # time to sleep before restarting a service
 630 RestartSec=20
 631
 632 [Install]
 633 WantedBy=multi-user.target
 634 EOF
 635
 636 u /etc/systemd/system/mailnnroute.service <<'EOF'
 637 [Unit]
 638 Description=Network routing for mailnn
 639 After=syslog.target network-online.target mailnn.service
 640 Wants=network-online.target
 641 JoinsNamespaceOf=mailnn.service
 642 BindsTo=mailnn.service
 643 StartLimitIntervalSec=0
 644
 645 [Service]
 646 Type=simple
 647 RemainAfterExit=true
 648 PrivateNetwork=true
 649 ExecStart=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns -n 10.173.8 start mail
 650 ExecStop=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns stop mail
 651 Restart=always
 652 RestartSec=20
 653
 654
 655 [Install]
 656 WantedBy=multi-user.target
 657 EOF
 658
 659 #
 660 u /etc/systemd/system/mailnn.service <<'EOF'
 661 [Unit]
 662 Description=Network Namespace for mail vpn service that will live forever and cant fail
 663 After=syslog.target network-online.target
 664 Wants=network-online.target
 665
 666 [Service]
 667 Type=simple
 668 PrivateNetwork=true
 669 ExecStart=/bin/sleep infinity
 670
 671 [Install]
 672 WantedBy=multi-user.target
 673 EOF
 674
 675 u /etc/systemd/system/mailbindwatchdog.service <<EOF
 676 [Unit]
 677 Description=Watchdog to restart services relying on systemd-resolved dir
 678 After=syslog.target network-online.target
 679 Wants=network-online.target
 680 BindsTo=mailnn.service
 681
 682 [Service]
 683 Type=simple
 684 ExecStart=/usr/local/bin/mailbindwatchdog $vpnser ${nn_progs[@]} unbound.service radicale.service
 685 Restart=always
 686 # time to sleep before restarting a service
 687 RestartSec=10
 688
 689 [Install]
 690 WantedBy=multi-user.target
 691 EOF
 692
 693
 694
 695 # old service name
 696 rm -fv /etc/systemd/system/openvpn-client-mail@.service
 697
 698 # We use a local unbound because systemd-resolved wont accept our
 699 # request, it will only listen to 127.0.0.53 in the main network
 700 # namespace, and rejected feature requests to change that (although I
 701 # could change the code and recompile), but anyways, that could answer
 702 # with things specific to the lan that aren't applicable in this
 703 # namespace, and since unbound is a recursive resolver, it means we just
 704 # use our own ip against dnsbl rate limits.
 705 #
 706 # If we ever notice this change, chattr +i on it
 707 # trust-ad is used in t10+, glibc 2.31
 708
 709 u /etc/127.0.0.1-resolv/stub-resolv.conf <<'EOF'
 710 nameserver 127.0.0.1
 711 options edns0 trust-ad
 712 EOF
 713
 714 u /etc/127.0.0.53-resolv/stub-resolv.conf <<'EOF'
 715 nameserver 127.0.0.53
 716 options edns0 trust-ad
 717 EOF
 718
 719
 720 u /etc/10.173.8.1-resolv/stub-resolv.conf <<'EOF'
 721 nameserver 10.173.8.1
 722 options edns0 trust-ad
 723 EOF
 724
 725 # this is just a bug fix for trisquel.
 726 f=/etc/apparmor.d/usr.sbin.unbound
 727 line="/usr/sbin/unbound flags=(attach_disconnected) {"
 728 if ! grep -qFx "$line" $f; then
 729   badline="/usr/sbin/unbound {"
 730   if ! grep -qFx "$badline" $f; then
 731     err expected line in $f not found
 732   fi
 733   sed -i "s,^$badline$,$line," $f
 734   if systemctl is-active apparmor &>/dev/null; then
 735     m systemctl reload apparmor
 736   fi
 737 fi
 738
 739 # note: anything added to nn_progs needs corresponding rm
 740 # down below in the host switch
 741 nn_progs=(exim4)
 742 if mailhost; then
 743   # Note dovecots lmtp doesnt need to be in the same nn to accept delivery.
 744   # Its in the nn so remote clients can connect to it.
 745   nn_progs+=(spamassassin dovecot)
 746 fi
 747
 748 case $HOSTNAME in
 749   $MAIL_HOST)
 750     # todo, should this be after vpn service
 751     u /etc/systemd/system/unbound.service.d/nn.conf <<EOF
 752 [Unit]
 753 After=mailnn.service
 754 JoinsNamespaceOf=mailnn.service
 755 BindsTo=mailnn.service
 756 StartLimitIntervalSec=0
 757
 758 [Service]
 759 PrivateNetwork=true
 760 # note the nsswitch bind is actually not needed for bk, but
 761 # its the same file so it does no harm.
 762 BindPaths=$bindpaths
 763
 764 Restart=always
 765 RestartSec=20
 766 EOF
 767
 768     # sooo, there are a few ways to get traffic from the mail network
 769     # namespace to go over the wghole.
 770     #
 771     #1: unify the mail vpn and wghole
 772     # into 1 network.  this seems simple and logical, so I'm doing it.
 773     # One general downside is tying things together, if I need to mess
 774     # with one thing, it breaks the other. Oh well for now.
 775     #
 776     # 2. We can route 10.5.3.0/24 out of the mail nn and nat it into wghole.
 777     #
 778     # 3. We can setup the routing to happen on li, which seemed like I
 779     # just needed to add 10.8.0.4/24 to AllowedIPs in at least the
 780     # wghole clients, but I think that is kind of hacky and breaks ipv4
 781     # routing within the mailvpn, it happened to work just because exim
 782     # prefers ipv6 and that was also available in the mailvpn.
 783     #
 784     # 4. Put the hole interface into the mail network namespace. This
 785     # doesn't work if the mail vpn is wg.  For openvpn, it bypasses the
 786     # vpn routing and establishes a direct connection.  I only use the
 787     # hole vpn for randomish things, it should be fine to join the mail
 788     # nn for that. There should be some way to fix the routing issue
 789     # by doing manual routing, but that doesn't seem like a good use of time.
 790     # relevant:
 791     # https://www.wireguard.com/netns/#
 792     #
 793     # for wireguard debugging
 794     # echo module wireguard +p > /sys/kernel/debug/dynamic_debug/control
 795     # dmesg -w
 796
 797     ;;&
 798   $MAIL_HOST|bk)
 799     for unit in ${nn_progs[@]}; do
 800       u /etc/systemd/system/$unit.service.d/nn.conf <<EOF
 801 [Unit]
 802
 803 # Wants appears better than requires because with requires,
 804 # if the vpnser fails to start, this service won't get run at
 805 # all, even if the vpnser starts on an automatic restart.
 806
 807 Wants=$vpnser
 808 After=network.target mailnn.service $vpnser
 809 JoinsNamespaceOf=mailnn.service
 810 BindsTo=mailnn.service
 811 StartLimitIntervalSec=0
 812
 813 [Service]
 814 PrivateNetwork=true
 815 # note the nsswitch bind is actually not needed for bk, but
 816 # its the same file so it does no harm.
 817 BindPaths=$bindpaths
 818
 819 Restart=always
 820 RestartSec=20
 821 EOF
 822     done
 823     ;;
 824   *)
 825     for unit in exim4 spamassassin dovecot unbound; do
 826       f=/etc/systemd/system/$unit.service.d/nn.conf
 827       if [[ -s $f ]]; then
 828         rm -fv $f
 829         reload=true
 830       fi
 831     done
 832     ;;
 833 esac
 834
 835 # * wghole (another mail vpn)
 836
 837 if $bhost_t; then
 838   u /etc/systemd/system/wg-quick@wghole.service.d/override.conf <<'EOF'
 839 [Unit]
 840 StartLimitIntervalSec=0
 841
 842 [Service]
 843 Restart=on-failure
 844 RestartSec=20
 845 EOF
 846 fi
 847
 848 # * spamassassin config
 849 u /etc/sysctl.d/80-iank-mail.conf <<'EOF'
 850 # see exim spec
 851 net.netfilter.nf_conntrack_tcp_timeout_close_wait = 120
 852 EOF
 853 if $ur; then
 854   m sysctl -p
 855 fi
 856
 857 u /etc/spamassassin/mylocal.cf <<'EOF'
 858 # this is mylocal.cf because the normal local.cf has a bunch of upstream stuff i dont want to mess with
 859
 860 # /usr/share/doc/exim4-base/README.Debian.gz:
 861 #   SpamAssassin's default report should not be used in a add_header
 862 #   statement since it contains empty lines. (This triggers e.g. Amavis'
 863 #   warning "BAD HEADER SECTION, Improper folded header field made up
 864 #   entirely of whitespace".) This is a safe, terse alternative:
 865 clear_report_template
 866 report (_SCORE_ / _REQD_ requ) _TESTSSCORES(,)_ autolearn=_AUTOLEARN
 867 uridnsbl_skip_domain iankelling.org
 868 uridnsbl_skip_domain amnimal.ninja
 869 uridnsbl_skip_domain expertpathologyreview.com
 870 uridnsbl_skip_domain zroe.org
 871 EOF
 872
 873 # 2020-10-19 remove old file. remove this when all hosts updated
 874 rm -fv /etc/systemd/system/spamddnsfix.{timer,service}
 875
 876 u /etc/default/spamassassin <<'EOF'
 877 # defaults plus debugging flags for an issue im having
 878 OPTIONS="--create-prefs --max-children 5 --helper-home-dir"
 879 PIDFILE="/var/run/spamd.pid"
 880 # my additions
 881 NICE="--nicelevel 15"
 882 CRON=1
 883 EOF
 884 #####   end spamassassin config
 885
 886
 887 # * Update mail cert
 888
 889
 890 ## needed only for openvpn mail vpn.
 891 # if [[ -e /p/c/filesystem ]]; then
 892 #   # note, man openvpn implies we could just call mail-route on vpn startup/shutdown with
 893 #   # systemd, buuut it can remake the tun device unexpectedly, i got this in the log
 894 #   # after my internet was down for a bit:
 895 #   # NOTE: Pulled options changed on restart, will need to close and reopen TUN/TAP device.
 896 #   m /a/exe/vpn-mk-client-cert -b mailclient -n mail li.iankelling.org
 897 # fi
 898
 899 # With openvpn, I didn't get around to persisting the openvpn
 900 # cert/configs into /p/c/machine_specific/bk, so I had this case to
 901 # manually get the cert. However, we aren't using openvpn anymore, so it
 902 # is commented out.
 903 #
 904 # case $HOSTNAME in
 905 #   bk)
 906 #     if [[ ! -e /etc/openvpn/client/mail.conf ]]; then
 907 #       echo "$0: error: first, on a system with /p/c/filesystem, run mail-setup, or the vpn-mk-client-cert line above this err" 2>&2
 908 #       exit 1
 909 #     fi
 910 #     ;;
 911 # esac
 912
 913 m rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/mail-cert-cron /usr/local/bin
 914
 915 u /etc/systemd/system/mailcert.service <<'EOF'
 916 [Unit]
 917 Description=Mail cert rsync
 918 After=multi-user.target
 919
 920 [Service]
 921 Type=oneshot
 922 ExecStart=/usr/local/bin/sysd-mail-once mailcert /usr/local/bin/mail-cert-cron
 923 EOF
 924 u /etc/systemd/system/mailcert.timer <<'EOF'
 925 [Unit]
 926 Description=Run mail-cert once a day
 927
 928 [Timer]
 929 OnCalendar=daily
 930
 931 [Install]
 932 WantedBy=timers.target
 933 EOF
 934
 935
 936 wghost=${HOSTNAME}wg.b8.nz
 937 if $bhost_t && [[ ! -e /etc/exim4/certs/$wghost/privkey.pem ]]; then
 938   certbot -n --manual-public-ip-logging-ok --eff-email --agree-tos -m letsencrypt@iankelling.org \
 939           certonly --manual --preferred-challenges=dns \
 940           --manual-auth-hook /a/bin/ds/le-dns-challenge \
 941           --manual-cleanup-hook /a/bin/ds/le-dns-challenge-cleanup \
 942           --deploy-hook /a/bin/ds/le-exim-deploy -d $wghost
 943 fi
 944
 945 # * fail2ban
 946
 947 # todo: test that these configs actually work, eg run
 948 # s iptables-exim -S
 949 # and see someone is banned.
 950
 951 sed 's/^ *before *= *iptables-common.conf/before = iptables-common-exim.conf/' \
 952     /etc/fail2ban/action.d/iptables-multiport.conf| u /etc/fail2ban/action.d/iptables-exim.conf
 953 u /etc/fail2ban/action.d/iptables-common-exim.conf <<'EOF'
 954 # iank: same as iptables-common, except iptables is iptables-exim, ip6tables is ip6tables-exim
 955
 956 # Fail2Ban configuration file
 957 #
 958 # Author: Daniel Black
 959 #
 960 # This is a included configuration file and includes the definitions for the iptables
 961 # used in all iptables based actions by default.
 962 #
 963 # The user can override the defaults in iptables-common.local
 964 #
 965 # Modified: Alexander Koeppe <format_c@online.de>, Serg G. Brester <serg.brester@sebres.de>
 966 #       made config file IPv6 capable (see new section Init?family=inet6)
 967
 968 [INCLUDES]
 969
 970 after = iptables-blocktype.local
 971         iptables-common.local
 972 # iptables-blocktype.local is obsolete
 973
 974 [Definition]
 975
 976 # Option:  actionflush
 977 # Notes.:  command executed once to flush IPS, by shutdown (resp. by stop of the jail or this action)
 978 # Values:  CMD
 979 #
 980 actionflush = <iptables> -F f2b-<name>
 981
 982
 983 [Init]
 984
 985 # Option:  chain
 986 # Notes    specifies the iptables chain to which the Fail2Ban rules should be
 987 #          added
 988 # Values:  STRING  Default: INPUT
 989 chain = INPUT
 990
 991 # Default name of the chain
 992 #
 993 name = default
 994
 995 # Option:  port
 996 # Notes.:  specifies port to monitor
 997 # Values:  [ NUM | STRING ]  Default:
 998 #
 999 port = ssh
1000
1001 # Option:  protocol
1002 # Notes.:  internally used by config reader for interpolations.
1003 # Values:  [ tcp | udp | icmp | all ] Default: tcp
1004 #
1005 protocol = tcp
1006
1007 # Option:  blocktype
1008 # Note:    This is what the action does with rules. This can be any jump target
1009 #          as per the iptables man page (section 8). Common values are DROP
1010 #          REJECT, REJECT --reject-with icmp-port-unreachable
1011 # Values:  STRING
1012 blocktype = REJECT --reject-with icmp-port-unreachable
1013
1014 # Option:  returntype
1015 # Note:    This is the default rule on "actionstart". This should be RETURN
1016 #          in all (blocking) actions, except REJECT in allowing actions.
1017 # Values:  STRING
1018 returntype = RETURN
1019
1020 # Option:  lockingopt
1021 # Notes.:  Option was introduced to iptables to prevent multiple instances from
1022 #          running concurrently and causing irratic behavior.  -w was introduced
1023 #          in iptables 1.4.20, so might be absent on older systems
1024 #          See https://github.com/fail2ban/fail2ban/issues/1122
1025 # Values:  STRING
1026 lockingopt = -w
1027
1028 # Option:  iptables
1029 # Notes.:  Actual command to be executed, including common to all calls options
1030 # Values:  STRING
1031 iptables = /usr/local/bin/iptables-exim <lockingopt>
1032
1033
1034 [Init?family=inet6]
1035
1036 # Option:  blocktype (ipv6)
1037 # Note:    This is what the action does with rules. This can be any jump target
1038 #          as per the iptables man page (section 8). Common values are DROP
1039 #          REJECT, REJECT --reject-with icmp6-port-unreachable
1040 # Values:  STRING
1041 blocktype = REJECT --reject-with icmp6-port-unreachable
1042
1043 # Option:  iptables (ipv6)
1044 # Notes.:  Actual command to be executed, including common to all calls options
1045 # Values:  STRING
1046 iptables = /usr/local/bin/ip6tables-exim <lockingopt>
1047 EOF
1048
1049 u /etc/fail2ban/jail.d/exim.local <<'EOF'
1050 [exim]
1051 enabled  = true
1052 port     = 25,587
1053 filter   = exim
1054 banaction = iptables-exim
1055
1056 # 209.51.188.13 = mail.fsf.org
1057 # 2001:470:142::13 = mail.fsf.org
1058 # 209.51.188.92 = eggs.gnu.org
1059 # 2001:470:142:3::10 = eggs.gnu.org
1060 # 72.14.176.105 2600:3c00:e000:280::2 = mail.iankelling.org
1061 # 10.173.8.1 = non-nn net
1062 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
1063 EOF
1064 if $ur; then
1065   m systemctl restart fail2ban
1066 fi
1067
1068 # * common exim4 config
1069
1070
1071 ## old, not using forward files anymore
1072 rm -fv $uhome/.forward /root/.forward
1073
1074
1075 # Make all system users be aliases. preventative
1076 # prevents things like cron mail for user without alias
1077 awk 'BEGIN { FS = ":" } ; $6 !~ /^\/home/ || $7 ~ /\/nologin$/  { print $1 }' /etc/passwd| while read -r user; do
1078   if [[ ! $user ]]; then
1079     continue
1080   fi
1081   if ! grep -q "^$user:" /etc/aliases; then
1082     echo "$user: root" |m tee -a /etc/aliases
1083   fi
1084 done
1085
1086
1087 awk 'BEGIN { FS = ":" } ; $6 ~ /^\/home/ && $7 !~ /\/nologin$/ { print $1 }' /etc/passwd| while read -r user; do
1088   case $HOSTNAME in
1089     $MAIL_HOST)
1090       sed -i "/^user:/d" /etc/aliases
1091       ;;
1092     *)
1093       if ! grep -q "^$user:" /etc/aliases; then
1094         echo "$user: root" |m tee -a /etc/aliases
1095       fi
1096       ;;
1097   esac
1098 done
1099
1100
1101 . /a/bin/bash_unpublished/priv-mail-setup
1102
1103
1104 m gpasswd -a iank adm #needed for reading logs
1105
1106 ### make local bounces go to normal maildir
1107 # local mail that bounces goes to /Maildir or /root/Maildir
1108 dirs=(/m/md/bounces/{cur,tmp,new})
1109 m mkdir -p ${dirs[@]}
1110 m chown iank:iank /m /m/md
1111 m ln -sfT /m/md /m/iank
1112 m chmod 771 /m /m/md
1113 m chown -R $u:Debian-exim /m/md/bounces
1114 m chmod 775 ${dirs[@]}
1115 m usermod -a -G Debian-exim $u
1116 for d in /Maildir /root/Maildir; do
1117   if [[ ! -L $d ]]; then
1118     m rm -rf $d
1119   fi
1120   m ln -sf -T /m/md/bounces $d
1121 done
1122
1123 # dkim, client passwd file
1124 files=(/p/c/machine_specific/$HOSTNAME/filesystem/etc/exim4/*)
1125 f=/p/c/filesystem/etc/exim4/passwd.client
1126 if [[ -e $f ]]; then
1127   files+=($f)
1128 fi
1129 if (( ${#files[@]} )); then
1130   m rsync -ahhi --chown=root:Debian-exim --chmod=0640 \
1131     ${files[@]} /etc/exim4
1132 fi
1133
1134 # By default, only 10 days of logs are kept. increase that.
1135 # And dont compress, I look back at logs too often and
1136 # dont need the annoyance of decompressing them all the time.
1137 m sed -ri '/^\s*compress\s*$/d;s/^(\s*rotate\s).*/\11000/' /etc/logrotate.d/exim4-base
1138 files=(/var/log/exim4/*.gz)
1139 if (( ${#files[@]} )); then
1140   gunzip ${files[@]}
1141 fi
1142
1143 ## disabled. not using .forward files, but this is still interesting
1144 ## for reference.
1145 # ## https://blog.dhampir.no/content/make-exim4-on-debian-respect-forward-and-etcaliases-when-using-a-smarthost
1146 # # i only need .forwards, so just doing that one.
1147 # cd /etc/exim4/conf.d/router
1148 # b=userforward_higher_priority
1149 # # replace the router name so it is unique
1150 # sed -r s/^\\S+:/$b:/ 600_exim4-config_userforward >175_$b
1151 rm -fv /etc/exim4/conf.d/router/175_userforward_higher_priority
1152
1153 # todo, consider 'separate' in etc/exim4.conf, could it help on busy systems?
1154
1155 # alerts is basically the postmaster address
1156 m sed -i --follow-symlinks -f - /etc/aliases <<EOF
1157 \$a root: alerts@iankelling.org
1158 /^root:/d
1159 EOF
1160
1161 cat >/etc/exim4/conf.d/rewrite/34_iank_rewriting <<'EOF'
1162 ncsoft@zroe.org graceq2323@gmail.com hE
1163 EOF
1164
1165 # old name
1166 rm -fv /etc/exim4/conf.d/retry/37_retry
1167
1168 cat >/etc/exim4/conf.d/retry/17_retry <<'EOF'
1169 # Retry fast for my own domains
1170 iankelling.org * F,1d,1m;F,14d,1h
1171 amnimal.ninja * F,1d,1m;F,14d,1h
1172 expertpathologyreview.com * F,1d,1m;F,14d,1h
1173 je.b8.nz * F,1d,1m;F,14d,1h
1174 zroe.org * F,1d,1m;F,14d,1h
1175 eximbackup.b8.nz * F,1d,1m;F,14d,1h
1176
1177 # The spec says the target domain will be used for temporary host errors,
1178 # but i've found that isn't correct, the hostname is required
1179 # at least sometimes.
1180 nn.b8.nz * F,1d,1m;F,14d,1h
1181 defaultnn.b8.nz * F,1d,1m;F,14d,1h
1182 mx.iankelling.org * F,1d,1m;F,14d,1h
1183 bk.b8.nz * F,1d,1m;F,14d,1h
1184 eggs.gnu.org * F,1d,1m;F,14d,1h
1185 fencepost.gnu.org * F,1d,1m;F,14d,1h
1186
1187 # afaik our retry doesnt need this, but just using everything
1188 mx.amnimal.ninja * F,1d,1m;F,14d,1h
1189 mx.expertpathologyreview.com * F,1d,1m;F,14d,1h
1190
1191
1192 mail.fsf.org * F,1d,15m;F,14d,1h
1193 EOF
1194
1195
1196 rm -vf /etc/exim4/conf.d/main/000_localmacros # old filename
1197
1198 # separate file so without quoted EOF for convenience
1199 cat >/etc/exim4/conf.d/main/000_local2 <<EOF
1200 # normally empty, I set this so I can set the envelope address
1201 # when doing mail redelivery to invoke filters. Also allows
1202 # me exiqgrep and stuff.
1203 MAIN_TRUSTED_GROUPS = $u
1204 EOF
1205
1206 cd /etc/exim4
1207 {
1208   for f in *-private.pem; do
1209     echo ${f%-private.pem}
1210   done
1211 } | u /etc/exim4/conf.d/my-dkim-domains
1212
1213 rm -f /etc/exim4/conf.d/transport/11_iank
1214
1215 cat >/etc/exim4/conf.d/main/000_local <<'EOF'
1216 MAIN_TLS_ENABLE = true
1217
1218 # require tls connections for all smarthosts
1219 REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS = ! nn.b8.nz
1220 REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS = nn.b8.nz
1221
1222 # debian exim config added this in 2016 or so?
1223 # it's part of the smtp spec, to limit lines to 998 chars
1224 # but a fair amount of legit mail does not adhere to it. I don't think
1225 # this should be default, like it says in
1226 # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=828801
1227 # todo: the bug for introducing this was about headers, but
1228 # the fix maybe is for all lines? one says gmail rejects, the
1229 # other says gmail does not reject. figure out and open a new bug.
1230 IGNORE_SMTP_LINE_LENGTH_LIMIT = true
1231
1232 # more verbose logs. used to use +all, but made it less for more efficiency.
1233 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
1234
1235 # Based on spec, seems like a good idea to be nice.
1236 smtp_return_error_details = true
1237
1238 # default is 10. when exim has been down for a bit, fsf mailserver
1239 # will do a big send in one connection, then exim decides to put
1240 # the messages in the queue instead of delivering them, to avoid
1241 # spawning too many delivery processes. This is the same as the
1242 # fsfs value. And the corresponding one for how many messages
1243 # to send out in 1 connection remote_max_parallel = 256
1244 smtp_accept_queue_per_connection = 500
1245
1246
1247 DKIM_CANON = relaxed
1248 DKIM_SELECTOR = li
1249
1250
1251 # The file is based on the outgoing domain-name in the from-header.
1252 # sign if key exists
1253 DKIM_PRIVATE_KEY = ${if exists{/etc/exim4/${dkim_domain}-private.pem} {/etc/exim4/${dkim_domain}-private.pem}}
1254
1255 # most of the ones that gmail seems to use.
1256 # Exim has horrible default of signing unincluded
1257 # list- headers since they got mentioned in an
1258 # rfc, but this messes up mailing lists, like gnu/debian which want to
1259 # keep your dkim signature intact but add list- headers.
1260 DKIM_SIGN_HEADERS = mime-version:in-reply-to:references:from:date:subject:to
1261
1262 domainlist local_hostnames = ! je.b8.nz : ! bk.b8.nz : *.b8.nz : b8.nz
1263
1264 hostlist iank_trusted = <; \
1265 # veth0
1266 10.173.8.1 ; \
1267 # li li_ip6
1268 72.14.176.105 ; 2600:3c00::f03c:91ff:fe6d:baf8 ; \
1269 # li_vpn_net li_vpn_net_ip6s
1270 10.8.0.0/24; 2600:3c00:e000:280::/64 ; 2600:3c00:e002:3800::/56 ;  \
1271 # bk bk_ip6
1272 85.119.83.50 ; 2001:ba8:1f1:f0c9::2 ; \
1273 # je je_ipv6
1274 85.119.82.128 ; 2001:ba8:1f1:f09d::2 ; \
1275 # fsf_mit_net fsf_mit_net_ip6 fsf_net fsf_net_ip6 fsf_office_net
1276 18.4.89.0/24 ; 2603:3005:71a:2e00::/64 ; 209.51.188.0/24 ; 2001:470:142::/48 ; 74.94.156.208/28
1277
1278
1279 # this is the default delay_warning_condition, plus matching on local_domains.
1280 # If I have some problem with my local system that causes delayed delivery,
1281 # I dont want to send warnings out to non-local domains.
1282 delay_warning_condition = ${if or {\
1283   { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} }\
1284   { match{$h_precedence:}{(?i)bulk|list|junk} }\
1285   { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} }\
1286   { match_domain{$domain}{+local_domains} }\
1287   } {no}{yes}}
1288
1289
1290 # enable 587 in addition to the default 25, so that
1291 # i can send mail where port 25 is firewalled by isp
1292 daemon_smtp_ports = 25 : 587 : 10025
1293 # default of 25, can get stuck when catching up on mail
1294 smtp_accept_max = 400
1295 smtp_accept_reserve = 100
1296 smtp_reserve_hosts = +iank_trusted
1297
1298 # Rules that make receiving more liberal should be on backup hosts
1299 # so that we dont reject mail accepted by MAIL_HOST
1300 LOCAL_DENY_EXCEPTIONS_LOCAL_ACL_FILE = /etc/exim4/conf.d/local_deny_exceptions_acl
1301 EOF
1302
1303 if dpkg --compare-versions "$(dpkg-query -f='${Version}\n' --show exim4)" ge 4.94; then
1304   cat >>/etc/exim4/conf.d/main/000_local <<'EOF'
1305 # In t11, we cant do the old anymore because this is tainted data used in a file lookup.
1306 # /usr/share/doc/exim4/NEWS.Debian.gz suggests to use lookups to untaint data.
1307 DKIM_DOMAIN = ${lookup {${domain:$rh_from:}}lsearch,ret=key{/etc/exim4/conf.d/my-dkim-domains}}
1308 EOF
1309 else
1310   cat >>/etc/exim4/conf.d/main/000_local <<'EOF'
1311 # From comments in
1312 # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
1313 # and its best for this to align https://tools.ietf.org/html/rfc7489#page-8
1314 # There could be some circumstance when the
1315 # from: isnt our domain, but the envelope sender is
1316 # and so still want to sign, but I cant think of any case.
1317 DKIM_DOMAIN = ${lc:${domain:$rh_from:}}
1318 EOF
1319 fi
1320
1321 rm -fv /etc/exim4/rcpt_local_acl # old path
1322
1323 u /etc/exim4/conf.d/local_deny_exceptions_acl <<'EOF'
1324 # This acl already exists in rcpt, this just makes it more widespread.
1325 # See the comment there for its rationale. The reason it needs to be
1326 # more widespread is that I've turned on sender verification, but cron
1327 # emails can fail sender verification since I may be in a network that
1328 # doesn't have my local dns.
1329 accept
1330   authenticated = *
1331
1332 # i setup a local programs smtp to mail.iankelling.org, this
1333 # skips sender verification for it.
1334 accept
1335   hosts = 10.173.8.1
1336 EOF
1337
1338 rm -fv /etc/exim4/data_local_acl # old path
1339
1340 u /etc/exim4/conf.d/data_local_acl <<'EOF'
1341 # Except for the "condition =", this was
1342 # a comment in the check_data acl. The comment about this not
1343 # being suitable has been changed in newer exim versions. The only thing
1344 # related I found was to
1345 # add the condition =, cuz spamassassin has problems with big
1346 # messages and spammers don't bother with big messages,
1347 # but I've increased the size from 10k
1348 # suggested in official docs, and 100k in the wiki example because
1349 # those docs are rather old and I see a 110k spam message
1350 # pretty quickly looking through my spam folder.
1351
1352 #warn
1353   !hosts = +iank_trusted
1354   remove_header = X-Spam_score: X-Spam_score_int : X-Spam_bar : X-Spam_report
1355
1356 warn
1357   !hosts = +iank_trusted
1358   # Smarthosts connect with residential ips and thus get flagged as spam if we do a spam check.
1359   !authenticated = plain_server:login_server
1360   condition = ${if < {$message_size}{5000K}}
1361   spam = Debian-exim:true
1362   add_header = X-Spam_score_int: $spam_score_int
1363   add_header = X-Spam_score: $spam_score
1364   add_header = X-Spam_bar: $spam_bar
1365   add_header = X-Spam_report: $spam_report
1366   add_header = X-Spam_action: $spam_action
1367
1368
1369 #accept
1370 #  spf = pass:fail:softfail:none:neutral:permerror:temperror
1371 #  dmarc_status = reject:quarantine
1372 #  add_header = Reply-to: dmarctest@iankelling.org
1373
1374 EOF
1375
1376
1377 # old file
1378 rm -fv /etc/exim4/conf.d/router/8{8,9}0_backup_copy \
1379    /etc/exim4/conf.d/router/865_backup_redir \
1380    /etc/exim4/conf.d/router/870_backup_local
1381
1382 # It is important for this to exist everywhere except in MAIL_HOST
1383 # non-nn config. Previously, just had it in the nn-config on MAIL_HOST,
1384 # but that is a problem if we change mail host and still have something
1385 # in the queue which was destined for this router, but hosts were
1386 # unreachable, the routers will be reevaluated on the next retry.
1387 u /etc/exim4/conf.d/router/170_backup_copy <<EOF
1388 ### router/900_exim4-config_local_user
1389 #################################
1390
1391 backup_copy:
1392 driver = manualroute
1393 domains = eximbackup.b8.nz
1394 transport = backup_remote
1395 ignore_target_hosts = ${HOSTNAME}wg.b8.nz
1396 # note changes here also require change in passwd.client
1397 route_list = * eximbackup.b8.nz
1398 same_domain_copy_routing = yes
1399 errors_to = alerts@iankelling.org
1400 no_more
1401 EOF
1402
1403
1404 # exim4-config transports are the same as default except for
1405 # message_linelength_limit = 2097152
1406 #
1407 # TODO: copy the defaults into their own file, and setup a cronjob so
1408 # that if file.dpkg-dist shows up, and it is different, we get an alert.
1409
1410 u /etc/exim4/conf.d/transport/30_exim4-config_remote_smtp_smarthost <<'EOF'
1411 ### transport/30_exim4-config_remote_smtp_smarthost
1412 #################################
1413
1414 # This transport is used for delivering messages over SMTP connections
1415 # to a smarthost. The local host tries to authenticate.
1416 # This transport is used for smarthost and satellite configurations.
1417
1418 remote_smtp_smarthost:
1419   debug_print = "T: remote_smtp_smarthost for $local_part@$domain"
1420   driver = smtp
1421   message_linelength_limit = 2097152
1422   multi_domain
1423   hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \
1424         {\
1425         ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\
1426         }\
1427         {} \
1428       }
1429 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1430   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1431 .endif
1432 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1433   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1434 .endif
1435 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1436   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1437 .endif
1438 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1439   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1440 .endif
1441 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1442   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1443 .endif
1444 .ifdef REMOTE_SMTP_RETURN_PATH
1445   return_path = REMOTE_SMTP_RETURN_PATH
1446 .endif
1447 .ifdef REMOTE_SMTP_HELO_DATA
1448   helo_data=REMOTE_SMTP_HELO_DATA
1449 .endif
1450 .ifdef TLS_DH_MIN_BITS
1451 tls_dh_min_bits = TLS_DH_MIN_BITS
1452 .endif
1453 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1454 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1455 .endif
1456 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1457 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1458 .endif
1459 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1460   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1461 .endif
1462 .ifdef REMOTE_SMTP_SMARTHOST_PROTOCOL
1463   protocol = REMOTE_SMTP_SMARTHOST_PROTOCOL
1464 .endif
1465 EOF
1466
1467 u /etc/exim4/conf.d/transport/30_exim4-config_remote_smtp <<'EOF'
1468 ### transport/30_exim4-config_remote_smtp
1469 #################################
1470 # This transport is used for delivering messages over SMTP connections.
1471
1472 remote_smtp:
1473   debug_print = "T: remote_smtp for $local_part@$domain"
1474   driver = smtp
1475   message_linelength_limit = 2097152
1476 .ifdef REMOTE_SMTP_HOSTS_AVOID_TLS
1477   hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
1478 .endif
1479 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1480   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1481 .endif
1482 .ifdef REMOTE_SMTP_RETURN_PATH
1483   return_path = REMOTE_SMTP_RETURN_PATH
1484 .endif
1485 .ifdef REMOTE_SMTP_HELO_DATA
1486   helo_data=REMOTE_SMTP_HELO_DATA
1487 .endif
1488 .ifdef REMOTE_SMTP_INTERFACE
1489   interface = REMOTE_SMTP_INTERFACE
1490 .endif
1491 .ifdef DKIM_DOMAIN
1492 dkim_domain = DKIM_DOMAIN
1493 .endif
1494 .ifdef DKIM_IDENTITY
1495 dkim_identity = DKIM_IDENTITY
1496 .endif
1497 .ifdef DKIM_SELECTOR
1498 dkim_selector = DKIM_SELECTOR
1499 .endif
1500 .ifdef DKIM_PRIVATE_KEY
1501 dkim_private_key = DKIM_PRIVATE_KEY
1502 .endif
1503 .ifdef DKIM_CANON
1504 dkim_canon = DKIM_CANON
1505 .endif
1506 .ifdef DKIM_STRICT
1507 dkim_strict = DKIM_STRICT
1508 .endif
1509 .ifdef DKIM_SIGN_HEADERS
1510 dkim_sign_headers = DKIM_SIGN_HEADERS
1511 .endif
1512 .ifdef DKIM_TIMESTAMPS
1513 dkim_timestamps = DKIM_TIMESTAMPS
1514 .endif
1515 .ifdef TLS_DH_MIN_BITS
1516 tls_dh_min_bits = TLS_DH_MIN_BITS
1517 .endif
1518 .ifdef REMOTE_SMTP_TLS_CERTIFICATE
1519 tls_certificate = REMOTE_SMTP_TLS_CERTIFICATE
1520 .endif
1521 .ifdef REMOTE_SMTP_PRIVATEKEY
1522 tls_privatekey = REMOTE_SMTP_PRIVATEKEY
1523 .endif
1524 .ifdef REMOTE_SMTP_HOSTS_REQUIRE_TLS
1525   hosts_require_tls = REMOTE_SMTP_HOSTS_REQUIRE_TLS
1526 .endif
1527 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1528   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1529 .endif
1530
1531 EOF
1532
1533 u /etc/exim4/conf.d/transport/30_backup_remote <<'EOF'
1534 backup_remote:
1535   driver = smtp
1536   multi_domain
1537   message_linelength_limit = 2097152
1538   hosts_require_auth = *
1539   hosts_try_auth = *
1540   envelope_to_add
1541   # manual return path because we want it to be the envelope sender
1542   # we got not the one we are using in this smtp transport
1543   headers_add = "Return-path: $sender_address"
1544 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1545   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1546 .endif
1547 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1548   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1549 .endif
1550 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1551   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1552 .endif
1553 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1554   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
1555 .endif
1556 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1557   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1558 .endif
1559 .ifdef REMOTE_SMTP_HELO_DATA
1560   helo_data=REMOTE_SMTP_HELO_DATA
1561 .endif
1562 .ifdef TLS_DH_MIN_BITS
1563 tls_dh_min_bits = TLS_DH_MIN_BITS
1564 .endif
1565 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1566 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1567 .endif
1568 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1569 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1570 .endif
1571 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1572   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1573 .endif
1574 EOF
1575
1576 u /etc/exim4/conf.d/router/900_exim4-config_local_user <<'EOF'
1577 ### router/900_exim4-config_local_user
1578 #################################
1579
1580 # This router matches local user mailboxes. If the router fails, the error
1581 # message is "Unknown user".
1582 local_user:
1583   debug_print = "R: local_user for $local_part@$domain"
1584   driver = accept
1585   domains = +local_domains
1586 # ian: default file except where mentioned.
1587 # ian: commented this. I get all local parts. for bk, an rcpt
1588 # check handles checking with dovecot, and the only router
1589 # after this is root.
1590 #  local_parts = ! root
1591   transport = LOCAL_DELIVERY
1592   cannot_route_message = Unknown user
1593 # ian: added for + addressing.
1594   local_part_suffix = +*
1595   local_part_suffix_optional
1596 EOF
1597 u /etc/exim4/conf.d/transport/30_exim4-config_dovecot_lmtp <<'EOF'
1598 dovecot_lmtp:
1599   driver = lmtp
1600   socket = /var/run/dovecot/lmtp
1601   #maximum number of deliveries per batch, default 1
1602   batch_max = 200
1603   envelope_to_add
1604 EOF
1605
1606 u /etc/exim4/conf.d/transport/30_remote_smtp_vpn <<'EOF'
1607 # same as debians 30_exim4-config_remote_smtp, but
1608 # with interface added at the end.
1609
1610 remote_smtp_vpn:
1611   debug_print = "T: remote_smtp_vpn for $local_part@$domain"
1612   driver = smtp
1613   message_linelength_limit = 2097152
1614 .ifdef REMOTE_SMTP_HOSTS_AVOID_TLS
1615   hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
1616 .endif
1617 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1618   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1619 .endif
1620 .ifdef REMOTE_SMTP_RETURN_PATH
1621   return_path = REMOTE_SMTP_RETURN_PATH
1622 .endif
1623 .ifdef REMOTE_SMTP_HELO_DATA
1624   helo_data=REMOTE_SMTP_HELO_DATA
1625 .endif
1626 .ifdef DKIM_DOMAIN
1627 dkim_domain = DKIM_DOMAIN
1628 .endif
1629 .ifdef DKIM_SELECTOR
1630 dkim_selector = DKIM_SELECTOR
1631 .endif
1632 .ifdef DKIM_PRIVATE_KEY
1633 dkim_private_key = DKIM_PRIVATE_KEY
1634 .endif
1635 .ifdef DKIM_CANON
1636 dkim_canon = DKIM_CANON
1637 .endif
1638 .ifdef DKIM_STRICT
1639 dkim_strict = DKIM_STRICT
1640 .endif
1641 .ifdef DKIM_SIGN_HEADERS
1642 dkim_sign_headers = DKIM_SIGN_HEADERS
1643 .endif
1644 .ifdef TLS_DH_MIN_BITS
1645 tls_dh_min_bits = TLS_DH_MIN_BITS
1646 .endif
1647 .ifdef REMOTE_SMTP_TLS_CERTIFICATE
1648 tls_certificate = REMOTE_SMTP_TLS_CERTIFICATE
1649 .endif
1650 .ifdef REMOTE_SMTP_PRIVATEKEY
1651 tls_privatekey = REMOTE_SMTP_PRIVATEKEY
1652 .endif
1653 .ifdef REMOTE_SMTP_HOSTS_REQUIRE_TLS
1654   hosts_require_tls = REMOTE_SMTP_HOSTS_REQUIRE_TLS
1655 .endif
1656 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1657   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1658 .endif
1659   interface = <; 10.8.0.4 ; 2600:3c00:e002:3800::4
1660 EOF
1661
1662 u /etc/exim4/conf.d/transport/30_smarthost_dkim <<'EOF'
1663 # ian: this is remote_smtp_smarthost plus the dkim parts from remote_smtp
1664
1665 smarthost_dkim:
1666   debug_print = "T: remote_smtp_smarthost for $local_part@$domain"
1667   driver = smtp
1668   message_linelength_limit = 2097152
1669   multi_domain
1670   hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \
1671         {\
1672         ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\
1673         }\
1674         {} \
1675       }
1676 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1677   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1678 .endif
1679 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1680   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1681 .endif
1682 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1683   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1684 .endif
1685 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1686   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
1687 .endif
1688 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1689   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1690 .endif
1691 .ifdef REMOTE_SMTP_RETURN_PATH
1692   return_path = REMOTE_SMTP_RETURN_PATH
1693 .endif
1694 .ifdef REMOTE_SMTP_HELO_DATA
1695   helo_data=REMOTE_SMTP_HELO_DATA
1696 .endif
1697 .ifdef TLS_DH_MIN_BITS
1698 tls_dh_min_bits = TLS_DH_MIN_BITS
1699 .endif
1700 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1701 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1702 .endif
1703 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1704 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1705 .endif
1706 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1707   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
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 EOF
1728
1729
1730 cat >/etc/exim4/update-exim4.conf.conf  <<'EOF'
1731 # default stuff, i havent checked if its needed
1732 dc_minimaldns='false'
1733 CFILEMODE='644'
1734 dc_use_split_config='true'
1735 dc_mailname_in_oh='true'
1736 EOF
1737
1738
1739 # * radicale
1740 if mailhost; then
1741   if ! mountpoint /o; then
1742     echo "error /o is not a mountpoint" >&2
1743     exit 1
1744   fi
1745
1746   # davx/davdroid setup instructions at the bottom
1747
1748   # main docs:
1749   # http://radicale.org/user_documentation/
1750   # https://davdroid.bitfire.at/configuration/
1751
1752   # note on debugging: if radicale can't bind to the address,
1753   # in the log it just says "Starting Radicale". If you run
1754   # it in the foreground, it will give more info. Background
1755   # plus debug does not help.
1756   # sudo -u radicale radicale -D
1757
1758   # created password file with:
1759   # htpasswd -c /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1760   # chmod 640 /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1761   # # setup chgrp www-data in ./conflink
1762
1763   pi-nostart radicale
1764   m usermod -a -G radicale iank
1765
1766   u /etc/systemd/system/radicale.service.d/override.conf <<EOF
1767 [Unit]
1768
1769 After=network.target network-online.target mailnn.service $vpnser
1770
1771 Wants=$vpnser
1772 JoinsNamespaceOf=mailnn.service
1773 StartLimitIntervalSec=0
1774
1775 [Service]
1776 PrivateNetwork=true
1777 BindPaths=$bindpaths
1778 Restart=always
1779 # time to sleep before restarting a service
1780 RestartSec=20
1781
1782 [Install]
1783 # for openvpn
1784 RequiredBy=$vpnser
1785 EOF
1786
1787
1788   # use persistent uid/gid
1789   IFS=:; read -r _ _ uid _ < <(getent passwd radicale ); unset IFS
1790   IFS=:; read -r _ _ gid _ < <(getent group radicale ); unset IFS
1791   if [[ $uid != 609 ]]; then
1792     m systemctl stop radicale ||:
1793     m usermod -u 609 radicale
1794     m groupmod -g 609 radicale
1795     m usermod -g 609 radicale
1796   fi
1797   m find /o/radicale  -xdev -exec chown -h 609 {} +
1798   m find /o/radicale -xdev -exec chgrp -h 609 {} +
1799
1800
1801   # I moved /var/lib/radicale after it's initialization.
1802   # I did a sudo -u radicale git init in the collections subfolder
1803   # after it gets created, per the git docs.
1804   m /a/exe/lnf -T /o/radicale /var/lib/radicale
1805
1806   # from https://www.williamjbowman.com/blog/2015/07/24/setting-up-webdav-caldav-and-carddav-servers/
1807
1808   # more config is for li in distro-end
1809
1810   # coment in this file says this is needed for it to run on startup
1811   sed -ri 's/^\s*#+\s*(ENABLE_RADICALE\s*=\s*yes\s*)/\1/' /etc/default/radicale
1812
1813   # comments say default is 0.0.0.0:5232
1814   m setini hosts 10.8.0.4:5232 server
1815   # https://radicale.org/2.1.html
1816   m setini type http_x_remote_user auth
1817
1818
1819   # disable power management feature, set to 240 min sync interval,
1820   # so it shouldn't be bad.
1821
1822   # davx^5 from f-droid
1823   # login with url and user name
1824   # url https://cal.iankelling.org/ian
1825   # username ian
1826   # pass, see password manager for radicale
1827   #
1828   # add account dialog:
1829   #
1830   # set account name as ian@iankelling.org, per help text below the
1831   # field.
1832   #
1833   # switch to groups are per-contact categories,
1834   # per https://davdroid.bitfire.at/configuration/radicale/
1835   #
1836   #
1837   # After setting up account, I added one address book, named
1838   # ianaddr. calender was already created, named ian. checked boxes under
1839   # both. synced.
1840   #
1841   # To restore from old phone to new phone, I wiped all data out, then copied over the newly created files. I think
1842   #
1843   # ignorable background info:
1844   #
1845   # opentasks uses the calendar file.
1846   #
1847   # The address book I created got a uuid as a name for the file. Note
1848   # the .props file says if it's a calendar or addressbook.
1849   #
1850   # When debugging, tailed /var/log/radicale/radicale.log and apache log,
1851   # both show the requests happening. Without creating the address book,
1852   # after creating a contact, a sync would delete it.
1853   #
1854   # Address books correspond to .props files in the radicale dir.
1855   #
1856   #  Some background is here,
1857   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1858   # which shows separate vcard option is from rfc 6350, the other is 2426,
1859   # radicale page says it implements the former not the latter,
1860   # which conflicts with the documentation of which to select, but whatever.
1861   # http://radicale.org/technical_choices/
1862   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1863   #
1864   # Note, url above says only cayanogenmod 13+ and omnirom can manage groups.
1865
1866   # Note, radicale had built-in git support to track changes, but they
1867   # removed it in 2.0.
1868
1869 fi
1870
1871 # * dovecot
1872
1873 # ** $MAIL_HOST|bk|je)
1874 case $HOSTNAME in
1875   $MAIL_HOST|bk|je)
1876     # based on a little google and package search, just the dovecot
1877     # packages we need instead of dovecot-common.
1878     #
1879     # dovecot-lmtpd is for exim to deliver to dovecot instead of maildir
1880     # directly.  The reason to do this is to use dovecot\'s sieve, which
1881     # can generally do more than exims filters (a few things less) and
1882     # sieve has the benefit of being supported in postfix and
1883     # proprietary/weird environments, so there is more examples on the
1884     # internet.
1885     pi-nostart dovecot-core dovecot-imapd dovecot-sieve dovecot-lmtpd dovecot-sqlite sqlite3
1886
1887     for f in /p/c{/machine_specific/$HOSTNAME,}/filesystem/etc/dovecot/users; do
1888       if [[ -e $f ]]; then
1889         m rsync -ahhi --chown=root:dovecot --chmod=0640 $f /etc/dovecot/
1890         break
1891       fi
1892     done
1893     for f in /p/c/subdir_files/sieve/*sieve /a/bin/ds/subdir_files/sieve/*sieve; do
1894       m sudo -u $u /a/exe/lnf -v -T $f $uhome/sieve/${f##*/}
1895     done
1896
1897     # https://wiki.dovecot.org/SSL/DovecotConfiguration
1898     u /etc/dovecot/dhparam <<'EOF'
1899 -----BEGIN DH PARAMETERS-----
1900 MIIBCAKCAQEAoleil6SBxGqQKk7j0y2vV3Oklv6XupZKn7PkPv485QuFeFagifeS
1901 A+Jz6Wquqk5zhGyCu63Hp4wzGs4TyQqoLjkaWL6Ra/Bw3g3ofPEzMGEsV1Qdqde4
1902 jorwiwtr2i9E6TXQp0noT/7VFeHulIkayTeW8JulINdMHs+oLylv16McGCIrxbkM
1903 8D1PuO0TP/CNDs2QbRvJ1RjY3CeGpxMhrSHVgBCUMwnA2cvz3bYjI7UMYMMDPNrE
1904 PLrwsYzXGGCdJsO2vsmmqqgLsZiapYJlUNjfiyWLt7E2H6WzkNB3VIhIPfLqFDPK
1905 xioE3sYKdjOt+p6mlg3l8+OLtODEFPHDqwIBAg==
1906 -----END DH PARAMETERS-----
1907 EOF
1908     {
1909
1910       if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
1911         cat <<'EOF'
1912 ssl_cert = </etc/exim4/fullchain.pem
1913 ssl_key = </etc/exim4/privkey.pem
1914 EOF
1915       else
1916         # We have a lets encrypt hooks that puts things here.
1917         # This is just for bk, which uses the vpn cert in exim
1918         # for sending mail, but the local hostname cert for
1919         # dovecot.
1920         cat <<'EOF'
1921 ssl_cert = </etc/exim4/exim.crt
1922 ssl_key = </etc/exim4/exim.key
1923 EOF
1924       fi
1925
1926       cat <<'EOF'
1927 # https://ssl-config.mozilla.org
1928 ssl = required
1929 # this is the same as the certbot list, i check changes in /a/bin/ds/filesystem/usr/local/bin/check-lets-encrypt-ssl-settings
1930 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
1931 ssl_protocols = TLSv1.2
1932 ssl_prefer_server_ciphers = no
1933
1934 protocol lmtp {
1935 #per https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
1936 # default is just $mail_plugins
1937   mail_plugins = $mail_plugins sieve
1938 }
1939 EOF
1940       if dpkg --compare-versions "$(dpkg-query -f='${Version}\n' --show dovecot-core)" ge 1:2.3; then
1941         cat <<EOF
1942 ssl_dh = </etc/dovecot/dhparam
1943 EOF
1944       fi
1945     } >/etc/dovecot/local.conf
1946
1947     ;;&
1948
1949   # **  $MAIL_HOST)
1950   $MAIL_HOST)
1951     # If we changed 90-sieve.conf and removed the active part of the
1952     # sieve option, we wouldn\'t need this, but I\'d rather not modify a
1953     # default config if not needed. This won\'t work as a symlink in /a/c
1954     # unfortunately.
1955     m sudo -u $u /a/exe/lnf -T sieve/main.sieve $uhome/.dovecot.sieve
1956
1957     if [[ ! -e $uhome/sieve/personal.sieve ]]; then
1958       m touch $uhome/sieve/personal{,end}{,test}.sieve
1959     fi
1960
1961     rm -fv /etc/dovecot/conf.d/20-lmtp.conf # file from prev version
1962     cat >>/etc/dovecot/local.conf <<EOF
1963 # simple password file based login
1964 !include conf.d/auth-passwdfile.conf.ext
1965
1966 # ian: %u is used for alerts user vs iank
1967 mail_location = maildir:/m/%u:LAYOUT=fs:INBOX=/m/%u/INBOX
1968 mail_uid = $u
1969 mail_gid = $u
1970
1971 protocol lmtp {
1972 # For a normal setup with exim, we need something like this, which
1973 # removes the domain part
1974 #  auth_username_format = %Ln
1975 #
1976 #  or else # Exim says something like
1977 #  "LMTP error after RCPT ... 550 ... User doesn't exist someuser@somedomain"
1978 # Dovecot verbose log says something like
1979 # "auth-worker(9048): passwd(someuser@somedomain): unknown user"
1980 # reference: http://wiki.dovecot.org/LMTP/Exim
1981 #
1982 # However, I use this to direct all mail to the same inbox.
1983 # A normal way to do this, which I did at first is to have
1984 # a router in exim almost at the end, eg 950,
1985 #local_catchall:
1986 #  debug_print = "R: catchall for \$local_part@\$domain"
1987 #  driver = redirect
1988 #  domains = +local_domains
1989 #  data = $u
1990 # based on
1991 # http://blog.alteholz.eu/2015/04/exim4-and-catchall-email-address/
1992 # with superflous options removed.
1993 # However, this causes the envelope to be rewritten,
1994 # which makes filtering into mailboxes a little less robust or more complicated,
1995 # so I've done it this way instead. it also requires
1996 # modifying the local router in exim.
1997   auth_username_format = $u
1998 }
1999 EOF
2000     ;;&
2001   # **  bk|je)
2002   bk|je)
2003     chown -R mail.mail /m/md
2004
2005     f=/etc/dovecot/conf.d/10-auth.conf
2006     if [[ -e $f ]]; then
2007       mv $f $f-iank-disabled
2008     fi
2009
2010     cat >>/etc/dovecot/local.conf <<EOF
2011 !include /etc/dovecot/local.conf.ext
2012
2013 # for debugging info, uncomment these.
2014 # logs go to syslog and to /var/log/mail.log
2015 #auth_verbose=yes
2016 #mail_debug=yes
2017
2018
2019 protocol lmtp {
2020 # This downcases the localpart. default is case sensitive.
2021 # case sensitive local part will miss out on valid email when some person or system
2022 # mistakenly capitalizes things.
2023   auth_username_format = %Lu
2024 }
2025
2026 # make 147 only listen on localhost, plan to use for nextcloud.
2027 # copied from mailinabox
2028 service imap-login {
2029   inet_listener imap {
2030     address = 127.0.0.1
2031   }
2032 }
2033 # https://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_dovecot_authenticator.html
2034 service auth {
2035   unix_listener auth-client {
2036     user = Debian-exim
2037     group = Debian-exim
2038   }
2039 }
2040
2041
2042 plugin {
2043   sieve_before = /etc/dovecot/sieve-spam.sieve
2044   # from mailinabox
2045   sieve = /m/sieve/%d/%n.sieve
2046   sieve_dir = /m/sieve/%d/%n
2047 }
2048
2049
2050 # all taken from mailinabox.
2051 mail_location = maildir:/m/md/%d/%n
2052 # meh, ok.
2053 mail_privileged_group = mail
2054 # By default Dovecot allows users to log in only with UID numbers 500 and above. mail is 8
2055 first_valid_uid = 1
2056
2057 # todo: test these changes in the universal config
2058 # mailboxes taken from mailinabox but removed
2059 # settings duplicate to defaults
2060 namespace inbox {
2061   mailbox INBOX {
2062     auto = subscribe
2063   }
2064   mailbox Spam {
2065     special_use = \Junk
2066     auto = subscribe
2067   }
2068   mailbox Drafts {
2069     auto = subscribe
2070   }
2071   mailbox Sent {
2072     auto = subscribe
2073   }
2074   mailbox Trash {
2075     auto = subscribe
2076   }
2077   mailbox Archive {
2078     special_use = \Archive
2079     auto = subscribe
2080   }
2081 }
2082 auth_mechanisms = plain login
2083 EOF
2084
2085     u /etc/dovecot/sieve-spam.sieve <<'EOF'
2086 require ["regex", "fileinto", "imap4flags"];
2087
2088 if allof (header :regex "X-Spam-Status" "^Yes") {
2089   fileinto "Spam";
2090   stop;
2091 }
2092 EOF
2093
2094     u /etc/dovecot/local.conf.ext <<'EOF'
2095 passdb {
2096   driver = sql
2097   args = /etc/dovecot/dovecot-sql.conf.ext
2098 }
2099 userdb {
2100   driver = sql
2101   args = /etc/dovecot/dovecot-sql.conf.ext
2102 }
2103
2104 EOF
2105
2106     u /etc/dovecot/dovecot-sql.conf.ext <<'EOF'
2107 # from mailinabox
2108 driver = sqlite
2109 # for je and bk, populated the testignore users for the relevant domains
2110 connect = /m/rc/users.sqlite
2111 default_pass_scheme = SHA512-CRYPT
2112 password_query = SELECT email as user, password FROM users WHERE email='%u';
2113 user_query = SELECT email AS user, "mail" as uid, "mail" as gid, "/m/md/%d/%n" as home FROM users WHERE email='%u';
2114 iterate_query = SELECT email AS user FROM users;
2115 EOF
2116     m chmod 0600 /etc/dovecot/dovecot-sql.conf.ext # per Dovecot instructions
2117
2118     # db needs to be in a www-data writable directory
2119     db=/m/rc/users.sqlite
2120     if [[ ! -s $db ]]; then
2121       m mkdir -p /m/rc
2122       m sqlite3 $db <<'EOF'
2123 CREATE TABLE users (
2124 id INTEGER PRIMARY KEY AUTOINCREMENT,
2125 email TEXT NOT NULL UNIQUE,
2126 password TEXT NOT NULL,
2127 extra,
2128 privileges TEXT NOT NULL DEFAULT '');
2129 EOF
2130     fi
2131     # users.sqlite is saved into /p/c/machine_specific, so update it there!.
2132     #
2133     # example of adding a user:
2134     # hash: doveadm pw -s SHA512-CRYPT -p passhere
2135     # sqlite3 /m/rc/users.sqlite <<'EOF'
2136     #insert into users (email, password) values ('testignore@bk.b8.nz', 'hash');
2137     #EOF
2138     # update users set password = 'hash' where email = 'testignore@bk.b8.nz';
2139
2140     # this should be at the end since it requires a valid dovecot config
2141     m sievec /etc/dovecot/sieve-spam.sieve
2142     ;;&
2143   # **  bk)
2144   bk)
2145     # roundcube uses this
2146     mkdir -p /m/sieve
2147     chown mail.mail /m/sieve
2148     m pi dovecot-managesieved
2149     ;;
2150 esac
2151
2152 # * thunderbird autoconfig setup
2153
2154 bkdomains=(expertpathologyreview.com amnimal.ninja)
2155 if [[ $HOSTNAME == bk ]]; then
2156   for domain in ${bkdomains[@]}; do
2157     m /a/exe/web-conf apache2 autoconfig.$domain
2158     dir=/var/www/autoconfig.$domain/html/mail
2159     m mkdir -p $dir
2160     # taken from mailinabox
2161     u $dir/config-v1.1.xml <<EOF
2162 <?xml version="1.0" encoding="UTF-8"?>
2163 <clientConfig version="1.1">
2164     <emailProvider id="$domain">
2165       <domain>$domain</domain>
2166
2167       <displayName>$domain Mail</displayName>
2168       <displayShortName>$domain</displayShortName>
2169
2170       <incomingServer type="imap">
2171          <hostname>mail2.iankelling.org</hostname>
2172          <port>993</port>
2173          <socketType>SSL</socketType>
2174          <username>%EMAILADDRESS%</username>
2175          <authentication>password-cleartext</authentication>
2176       </incomingServer>
2177
2178       <outgoingServer type="smtp">
2179          <hostname>mail2.iankelling.org</hostname>
2180          <port>587</port>
2181          <socketType>STARTTLS</socketType>
2182          <username>%EMAILADDRESS%</username>
2183          <authentication>password-cleartext</authentication>
2184          <addThisServer>true</addThisServer>
2185          <useGlobalPreferredServer>false</useGlobalPreferredServer>
2186       </outgoingServer>
2187
2188       <documentation url="https://$domain/">
2189          <descr lang="en">$domain website.</descr>
2190       </documentation>
2191     </emailProvider>
2192
2193     <webMail>
2194       <loginPage url="https://$domain/roundcube" />
2195       <loginPageInfo url="https://$domain/roundcube" >
2196         <username>%EMAILADDRESS%</username>
2197         <usernameField id="rcmloginuser" name="_user" />
2198         <passwordField id="rcmloginpwd" name="_pass" />
2199         <loginButton id="rcmloginsubmit" />
2200       </loginPageInfo>
2201     </webMail>
2202     <clientConfigUpdate url="https://autoconfig.$domain/mail/config-v1.1.xml" />
2203 </clientConfig>
2204 EOF
2205   done
2206 fi
2207
2208 # * roundcube setup
2209
2210 if [[ $HOSTNAME == bk ]]; then
2211
2212   # zip according to /installer
2213   # which requires adding a line to /usr/local/lib/roundcubemail/config/config.inc.php
2214   # $config['enable_installer'] = true;
2215   pi roundcube roundcube-sqlite3 php-zip apache2 php-fpm
2216
2217   ### begin composer install
2218   # https://getcomposer.org/doc/faqs/how-to-install-composer-programmatically.md
2219   # cd $(mktemp -d)
2220   # sum="$(wget -q -O - https://composer.github.io/installer.sig)"
2221   # m php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
2222   # if [[ $sum != $(php -r "echo hash_file('sha384', 'composer-setup.php');") ]]; then
2223   #   echo 'ERROR: Invalid composer installer checksum' >&2
2224   #   rm -fv composer-setup.php
2225   #   exit 1
2226   # fi
2227   # m php composer-setup.php --quiet
2228   # rm -fv composer-setup.php
2229   # m mv composer.phar /usr/local/bin
2230
2231   # the above method gets composer2, carddav plugin at least doesnt work with that
2232   # yet, it was just released 10-24-2020.
2233   m cd /usr/local/bin
2234   m wget -nv -N https://getcomposer.org/composer-1.phar
2235   chmod +x composer-1.phar
2236   ### end composer install
2237
2238   rcdirs=(/usr/local/lib/rcexpertpath /usr/local/lib/rcninja)
2239   ncdirs=(/var/www/ncninja)
2240   ncdirs=(/var/www/ncexpertpath /var/www/ncninja)
2241   # point debian cronjob to our local install, preventing daily cron error
2242
2243   # debian's cronjob will fail, remove both paths it uses just to be sure
2244   rm -fv /usr/share/roundcube/bin/cleandb.sh /etc/cron.d/roundcube-core
2245
2246   #### begin dl roundcube
2247   # note, im r2e subbed to https://github.com/roundcube/roundcubemail/releases.atom
2248   v=1.4.13; f=roundcubemail-$v-complete.tar.gz
2249   cd /root
2250   if [[ -e $f ]]; then
2251     timestamp=$(stat -c %Y $f)
2252   else
2253     timestamp=0
2254   fi
2255   m wget -nv -N https://github.com/roundcube/roundcubemail/releases/download/$v/$f
2256   new_timestamp=$(stat -c %Y $f)
2257   for rcdir in ${rcdirs[@]}; do
2258     if [[ $timestamp != "$new_timestamp" ||  ! -e "$rcdir/config/secret" ]]; then
2259       m tar -C /usr/local/lib --no-same-owner -zxf $f
2260       m rm -rf $rcdir
2261       m mv /usr/local/lib/roundcubemail-$v $rcdir
2262     fi
2263   done
2264   #### end dl roundcube
2265
2266   for ((i=0; i < ${#bkdomains[@]}; i++)); do
2267     domain=${bkdomains[i]}
2268     rcdir=${rcdirs[i]}
2269     rcbase=${rcdir##*/}
2270     ncdir=${ncdirs[i]}
2271     myncdir=/root/${ncdir##*/}
2272     mkdir -p $myncdir
2273
2274     # copied from debians cronjob
2275     u /etc/cron.d/$rcbase <<EOF
2276 #  Roundcube database cleaning: finally removes all records that are
2277 #  marked as deleted.
2278 0   5  *   *   *   www-data $rcdir/bin/cleandb.sh >/dev/null
2279 EOF
2280
2281     m /a/exe/web-conf - apache2 $domain <<EOF
2282 Alias /roundcube $rcdir
2283 ### begin roundcube settings
2284 # taken from /etc/apache2/conf-available/roundcube.conf version 1.4.8+dfsg.1-1~bpo10+1
2285 <Directory $rcdir/>
2286   Options +FollowSymLinks
2287   # This is needed to parse $rcdir/.htaccess.
2288   AllowOverride All
2289   Require all granted
2290 </Directory>
2291 # Protecting basic directories:
2292 <Directory $rcdir/config>
2293   Options -FollowSymLinks
2294   AllowOverride None
2295 </Directory>
2296 ### end roundcube settings
2297
2298
2299 ### begin nextcloud settings
2300 Alias /nextcloud "$ncdir/"
2301 <Directory $ncdir/>
2302   Require all granted
2303   AllowOverride All
2304   Options FollowSymLinks MultiViews
2305
2306   <IfModule mod_dav.c>
2307     Dav off
2308   </IfModule>
2309
2310 </Directory>
2311
2312 # based on install checker, links to
2313 # https://docs.nextcloud.com/server/19/admin_manual/issues/general_troubleshooting.html#service-discovery
2314 # their example was a bit wrong, I figured it out by adding
2315 # LogLevel warn rewrite:trace5
2316 # then watching the apache logs
2317
2318 RewriteEngine on
2319 RewriteRule ^/\.well-known/host-meta /nextcloud/public.php?service=host-meta [QSA,L]
2320 RewriteRule ^/\.well-known/host-meta\.json /nextcloud/public.php?service=host-meta-json [QSA,L]
2321 RewriteRule ^/\.well-known/webfinger /nextcloud/public.php?service=webfinger [QSA,L]
2322 RewriteRule ^/\.well-known/carddav /nextcloud/remote.php/dav/ [R=301,L]
2323 RewriteRule ^/\.well-known/caldav /nextcloud/remote.php/dav/ [R=301,L]
2324 ### end nextcloud settings
2325 EOF
2326     if [[ ! -e $rcdir/config/secret ]]; then
2327       base64 </dev/urandom | head -c24 >$rcdir/config/secret || [[ $? == 141 || ${PIPESTATUS[0]} == 32 ]]
2328     fi
2329     secret=$(cat $rcdir/config/secret)
2330
2331     rclogdir=/var/log/$rcbase
2332     rctmpdir=/var/tmp/$rcbase
2333     rcdb=/m/rc/$rcbase.sqlite
2334     # config from mailinabox
2335     u $rcdir/config/config.inc.php <<EOF
2336 <?php
2337 \$config = array();
2338 # debian creates this for us
2339 \$config['log_dir'] = '$rclogdir/';
2340 # debian also creates a temp dir, but it is under its install dir,
2341 # seems better to have our own.
2342 \$config['temp_dir'] = '$rctmpdir/';
2343 \$config['db_dsnw'] = 'sqlite:///$rcdb?mode=0640';
2344 \$config['default_host'] = 'ssl://localhost';
2345 \$config['default_port'] = 993;
2346 \$config['imap_conn_options'] = array(
2347   'ssl'         => array(
2348      'verify_peer'  => false,
2349      'verify_peer_name'  => false,
2350    ),
2351  );
2352 \$config['imap_timeout'] = 15;
2353 \$config['smtp_server'] = 'tls://127.0.0.1';
2354 \$config['smtp_conn_options'] = array(
2355   'ssl'         => array(
2356      'verify_peer'  => false,
2357      'verify_peer_name'  => false,
2358    ),
2359  );
2360 \$config['product_name'] = 'webmail';
2361 \$config['des_key'] = '$secret';
2362 \$config['plugins'] = array('archive', 'zipdownload', 'password', 'managesieve', 'jqueryui', 'carddav', 'html5_notifier');
2363 \$config['skin'] = 'elastic';
2364 \$config['login_autocomplete'] = 2;
2365 \$config['password_charset'] = 'UTF-8';
2366 \$config['junk_mbox'] = 'Spam';
2367 # disable builtin addressbook
2368 \$config['address_book_type'] = '';
2369 ?>
2370 EOF
2371
2372     m mkdir -p $rclogdir
2373     m chmod 750 $rclogdir
2374     m chown www-data:adm $rclogdir
2375     # note: subscribed to updates:
2376     # r2e add rcmcarddav https://github.com/blind-coder/rcmcarddav/commits/master.atom ian@iankelling.org
2377     # r2e add roundcube https://github.com/roundcube/roundcubemail/releases.atom ian@iankelling.org
2378     m mkdir -p $rctmpdir /m/rc
2379     m chown -R www-data.www-data $rctmpdir /m/rc
2380     m chmod 750 $rctmpdir
2381     # Ensure the log file monitored by fail2ban exists, or else fail2ban can't start.
2382     # todo: check for other mailinabox things
2383     m sudo -u www-data touch $rclogdir/errors.log
2384
2385     #### begin carddav install
2386     # This is the official roundcube carddav repo.
2387     # Install doc suggests downloading with composer, but that
2388     # didnt work, it said some ldap package for roundcube was missing,
2389     # but I dont want to download some extra ldap thing.
2390     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/INSTALL.md
2391     verf=$rcdir/plugins/carddav/myversion
2392     upgrade=false
2393     install=false
2394     v=4.0.0
2395     if [[ -e $verf ]]; then
2396       if [[ $(cat $verf) != "$v" ]]; then
2397         install=true
2398         upgrade=true
2399       fi
2400     else
2401       install=true
2402     fi
2403     if $install; then
2404       m rm -rf $rcdir/plugins/carddav
2405       tmpd=$(mktemp -d)
2406       m wget -nv -O $tmpd/t.tgz https://github.com/blind-coder/rcmcarddav/releases/download/v$v/carddav-v$v.tgz
2407       cd $rcdir/plugins
2408       tar xzf $tmpd/t.tgz
2409       rm -rf $tmpd
2410       m chown -R www-data:www-data $rcdir/plugins/carddav
2411       m cd $rcdir/plugins/carddav
2412       if $upgrade; then
2413         m sudo -u www-data composer-1.phar update --no-dev
2414       else
2415         m sudo -u www-data composer-1.phar install --no-dev
2416       fi
2417       m chown -R root:root $rcdir/plugins/carddav
2418       echo $v >$verf
2419     fi
2420
2421     # So, strangely, this worked in initial testing, but then
2422     # on first run it wouldn't show the existing contacts until
2423     # I went into the carddav settings and did "force immediate sync",
2424     # which seemed to fix things. Note, some of these settings
2425     # get initalized per/addressbook in the db, then need changing
2426     # there or through the settings menu.
2427
2428     # About categories, see https://www.davx5.com/tested-with/nextcloud
2429     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/GROUPS.md
2430     u $rcdir/plugins/carddav/config.inc.php <<EOF;
2431 <?php
2432 \$prefs['_GLOBAL']['hide_preferences'] = false;
2433 \$prefs['davserver'] = array(
2434 # name in the UI is kind of dumb. This is just something short that seems to fit ok.
2435   'name'         =>  'Main',
2436   'username'     =>  '%u', // login username
2437   'password'     =>  '%p', // login password
2438   'url'          =>  'https://$domain/nextcloud/remote.php/dav/addressbooks/users/%u/contacts',
2439   'active'       =>  true,
2440   'readonly'     =>  false,
2441   'refresh_time' => '00:10:00',
2442   'fixed'        =>  array('username','password'),
2443   'use_categories' => false,
2444   'hide'        =>  false,
2445 );
2446 ?>
2447 EOF
2448     #### end carddav install
2449
2450     cd $rcdir/plugins
2451     if [[ ! -d html5_notifier ]]; then
2452       m git clone https://github.com/stremlau/html5_notifier
2453     fi
2454     cd $rcdir/plugins/html5_notifier
2455     m git pull --rebase
2456
2457     # todo: try out roundcube plugins: thunderbird labels
2458
2459     # Password changing plugin settings
2460     cat $rcdir/plugins/password/config.inc.php.dist - >$rcdir/plugins/password/config.inc.php <<'EOF'
2461 # following are from mailinabox
2462 $config['password_minimum_length'] = 8;
2463 $config['password_db_dsn'] = 'sqlite:////m/rc/users.sqlite';
2464 $config['password_query'] = 'UPDATE users SET password=%D WHERE email=%u';
2465 $config['password_dovecotpw'] = '/usr/bin/doveadm pw';
2466 $config['password_dovecotpw_method'] = 'SHA512-CRYPT';
2467 $config['password_dovecotpw_with_method'] = true;
2468 EOF
2469     # so PHP can use doveadm, for the password changing plugin
2470     m usermod -a -G dovecot www-data
2471     m usermod -a -G mail $u
2472
2473     # so php can update passwords
2474     m chown www-data:dovecot /m/rc/users.sqlite
2475     m chmod 664 /m/rc/users.sqlite
2476
2477     # Run Roundcube database migration script (database is created if it does not exist)
2478     m $rcdir/bin/updatedb.sh --dir $rcdir/SQL --package roundcube
2479     m chown www-data:www-data $rcdb
2480     m chmod 664 $rcdb
2481   done # end loop over domains and rcdirs
2482
2483   ### begin php setup for rc ###
2484   # Enable PHP modules.
2485   m phpenmod -v php mcrypt imap
2486   # dpkg says this is required.
2487   # nextcloud needs these too
2488   m a2enmod proxy_fcgi setenvif
2489   fpm=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* (php[^ ]*-fpm)( .*|$)/\1/p') # eg: php7.4-fpm
2490   phpver=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* php([^ ]*)-fpm( .*|$)/\1/p')
2491   m a2enconf $fpm
2492   # 3 useless guides on php fpm fcgi debian 10 later, i figure out from reading
2493   # /etc/apache2/conf-enabled/php7.3-fpm.conf
2494   m a2dismod php$phpver
2495   # according to /install, we should set date.timezone,
2496   # but that is dumb, the system already has the right zone in
2497   # $rclogdir/errors.log
2498   # todo: consider other settings in
2499   # /a/opt/mailinabox/setup/nextcloud.sh
2500   u /etc/php/$phpver/cli/conf.d/30-local.ini <<'EOF'
2501 apc.enable_cli = 1
2502 EOF
2503
2504   u /etc/php/$phpver/fpm/conf.d/30-local.ini <<'EOF'
2505 date.timezone = "America/New_York"
2506 # for nextcloud
2507 upload_max_filesize = 2000M
2508 post_max_size = 2000M
2509 # install checker, nextcloud/settings/admin/overview
2510 memory_limit = 512M
2511 EOF
2512   m systemctl restart $fpm
2513   # dunno if reload/restart is needed
2514   m systemctl reload apache2
2515   # note bk backups are defined in crontab outside this file
2516   ### end php setup for rc ###
2517
2518 fi # end roundcube setup
2519
2520 # * nextcloud setup
2521
2522 if [[ $HOSTNAME == bk ]]; then
2523   # from install checker, nextcloud/settings/admin/overview and
2524   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2525   # curl from the web installer requirement, but i switched to cli
2526   # it recommends php-file info, but that is part of php7.3-common, already got installed
2527   # with roundcube.
2528   m pi php-curl php-bz2 php-gmp php-bcmath php-imagick php-apcu
2529
2530   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2531   cat >/etc/php/$phpver/fpm/pool.d/localwww.conf <<'EOF'
2532 [www]
2533 clear_env = no
2534 EOF
2535
2536   for ((i=0; i < ${#bkdomains[@]}; i++)); do
2537     domain=${bkdomains[i]}
2538     ncdir=${ncdirs[i]}
2539     ncbase=${ncdir##*/}
2540     m cd /var/www
2541     if [[ ! -e $ncdir/index.php ]]; then
2542       # if we wanted to only install a specific version, use something like
2543       # file=latest-22.zip
2544       file=latest.zip
2545       m wget -nv -N https://download.nextcloud.com/server/releases/$file
2546       m rm -rf nextcloud
2547       m unzip -q $file
2548       m rm -f $file
2549       m chown -R www-data.www-data nextcloud
2550       m mv nextcloud $ncdir
2551     fi
2552
2553     if [[ ! -e $myncdir/done-install ]]; then
2554       m cd $ncdir
2555       m sudo -u www-data php occ  maintenance:install --database sqlite --admin-user iank --admin-pass $nextcloud_admin_pass
2556       m touch $myncdir/done-install
2557     fi
2558
2559     # note, strange this happend where updater did not increment the version var,
2560     # mine was stuck on 20. I manually updated it.
2561     m cd $ncdir/config
2562     if [[ ! -e $myncdir/config.php-orig ]]; then
2563       m cp -a config.php $myncdir/config.php-orig
2564     fi
2565     cat $myncdir/config.php-orig - >$myncdir/tmp.php <<EOF
2566 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/email_configuration.html
2567 \$CONFIG["mail_smtpmode"] = "sendmail";
2568 \$CONFIG["mail_smtphost"] = "127.0.0.1";
2569 \$CONFIG["mail_smtpport"] = 25;
2570 \$CONFIG["mail_smtptimeout"] = 10;
2571 \$CONFIG["mail_smtpsecure"] = "";
2572 \$CONFIG["mail_smtpauth"] = false;
2573 \$CONFIG["mail_smtpauthtype"] = "LOGIN";
2574 \$CONFIG["mail_smtpname"] = "";
2575 \$CONFIG["mail_smtppassword"] = "";
2576 \$CONFIG["mail_domain"] = "$domain";
2577
2578 # https://github.com/nextcloud/user_external#readme
2579 # plus mailinabox example
2580 #\$CONFIG['user_backends'] = array(array('class' => 'OC_User_IMAP','arguments' => array('127.0.0.1', 143, null),),);
2581
2582
2583 # based on installer check
2584 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/caching_configuration.html
2585 \$CONFIG['memcache.local'] = '\OC\Memcache\APCu';
2586
2587 \$CONFIG['overwrite.cli.url'] = 'https://$domain/nextcloud';
2588 \$CONFIG['htaccess.RewriteBase'] = '/nextcloud';
2589 \$CONFIG['trusted_domains'] = array (
2590         0 => '$domain',
2591     );
2592 #\$CONFIG[''] = '';
2593 fwrite(STDOUT, "<?php\n\\\$CONFIG = ");
2594 var_export(\$CONFIG);
2595 fwrite(STDOUT, ";\n");
2596 EOF
2597     e running php $myncdir/tmp.php
2598     # note: we leave it around place for debugging
2599     php $myncdir/tmp.php >config.php
2600     cd $ncdir
2601     m sudo -u www-data php occ maintenance:update:htaccess
2602     list=$(sudo -u www-data php $ncdir/occ --output=json_pretty app:list)
2603     # user_external not compaible with nc 23
2604     for app in contacts calendar; do
2605       if [[ $(printf "%s\n" "$list"| jq ".enabled.$app") == null ]]; then
2606         cd $ncdir
2607         m sudo -u www-data php occ app:install $app
2608       fi
2609     done
2610     u /etc/systemd/system/$ncbase.service <<EOF
2611 [Unit]
2612 Description=ncup $ncbase
2613 After=multi-user.target
2614
2615 [Service]
2616 Type=oneshot
2617 ExecStart=/usr/local/bin/ncup $ncbase
2618 User=www-data
2619 IOSchedulingClass=idle
2620 CPUSchedulingPolicy=idle
2621 EOF
2622     u /etc/systemd/system/$ncbase.timer <<EOF
2623 [Unit]
2624 Description=ncup $ncbase timer
2625
2626 [Timer]
2627 OnCalendar=Daily
2628
2629 [Install]
2630 WantedBy=timers.target
2631 EOF
2632     systemctl enable --now $ncbase.timer
2633     u /usr/local/bin/ncup <<'EOFOUTER'
2634 #!/bin/bash
2635
2636 source /usr/local/lib/err
2637
2638 m() { printf "%s\n" "$*";  "$@"; }
2639 err-cleanup() {
2640   echo failed nextcloud update for $ncbase >&2
2641   # -odf or else systemd will kill the background delivery process
2642   # and the message will sit in the queue until the next queue run.
2643   exim -odf -t <<EOF
2644 To: alerts@iankelling.org
2645 From: www-data@$(hostname -f)
2646 Subject: failed nextcloud update for $ncbase
2647
2648 For logs, run: jr -u $ncbase
2649 EOF
2650 }
2651
2652 if [[ $(id -u -n) != www-data ]]; then
2653   echo error: running as wrong user: $(id -u -n), expected www-data
2654   exit 1
2655 fi
2656
2657 if [[ ! $1 ]]; then
2658   echo error: expected an arg, nextcloud relative base dir
2659   exit 1
2660 fi
2661
2662 ncbase=$1
2663 cd /var/www/$ncbase
2664 # https://docs.nextcloud.com/server/22/admin_manual/maintenance/update.html?highlight=updater+phar
2665 m php /var/www/$ncbase/updater/updater.phar -n
2666 EOFOUTER
2667     chmod +x /usr/local/bin/ncup
2668
2669     mkdir -p /var/www/cron-errors
2670     chown www-data.www-data /var/www/cron-errors
2671     u /etc/cron.d/$ncbase <<EOF
2672 PATH=/usr/sbin:/sbin:/usr/bin:/bin:/usr/local/bin
2673 SHELL=/bin/bash
2674 # https://docs.nextcloud.com/server/20/admin_manual/configuration_server/background_jobs_configuration.html
2675 */5  *  *  *  * www-data php -f $ncdir/cron.php --define apc.enable_cli=1 |& log-once nccron
2676 EOF
2677
2678   done
2679 fi
2680
2681
2682 # * exim host conditional config
2683
2684 # ** exim certs
2685
2686 all_dirs=(/p/c/filesystem)
2687 for x in /p/c/machine_specific/*.hosts /a/bin/ds/machine_specific/*.hosts; do
2688   if grep -qxF $HOSTNAME $x; then all_dirs+=( ${x%.hosts} ); fi
2689 done
2690 files=()
2691 for d in ${all_dirs[@]}; do
2692   f=$d/etc/exim4/passwd
2693   if [[ -e $f  ]]; then
2694     files+=($f)
2695   fi
2696   tmp=($d/etc/exim4/*.pem)
2697   if (( ${#tmp[@]} )); then
2698     files+=(${tmp[@]})
2699   fi
2700 done
2701
2702 if (( ${#files[@]} )); then
2703   sudo rsync -ahhi --chown=root:Debian-exim --chmod=0640 ${files[@]} /etc/exim4/
2704 fi
2705
2706
2707 # ** exim: auth
2708
2709 case $HOSTNAME in
2710   bk|je)
2711     # avoid accepting mail for invalid users
2712     # https://wiki.dovecot.org/LMTP/Exim
2713     cat >>/etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2714 deny
2715   message = invalid recipient
2716   domains = +local_domains
2717   !verify = recipient/callout=no_cache
2718 EOF
2719     u /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2720 dovecot_plain:
2721   driver = dovecot
2722   public_name = PLAIN
2723   server_socket = /var/run/dovecot/auth-client
2724   server_set_id = $auth1
2725 EOF
2726     ;;
2727 esac
2728 if $bhost_t; then
2729   u /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2730 # from 30_exim4-config_examples
2731 plain_server:
2732 driver = plaintext
2733 public_name = PLAIN
2734 server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
2735 server_set_id = $auth2
2736 server_prompts = :
2737 .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
2738 server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
2739 .endif
2740 EOF
2741 fi
2742
2743 # ** exim: main daemon use non-default config file
2744 case $HOSTNAME in
2745   bk|$MAIL_HOST)
2746     # to see the default comments in /etc/default/exim4:
2747     # s update-exim4defaults --force --init
2748     # which will overwrite any existing file
2749     u /etc/default/exim4 <<'EOF'
2750 QUEUERUNNER='combined'
2751 QUEUEINTERVAL='30m'
2752 COMMONOPTIONS='-C /etc/exim4/my.conf'
2753 UPEX4OPTS='-o /etc/exim4/my.conf'
2754 # i use epanic-clean for alerting if there are bad paniclog entries
2755 E4BCD_WATCH_PANICLOG='no'
2756 EOF
2757     # make exim be a nonroot setuid program.
2758     chown Debian-exim:Debian-exim /usr/sbin/exim4
2759     # needs guid set in order to become Debian-exim
2760     chmod g+s,u+s /usr/sbin/exim4
2761     # need this to avoid error on service reload:
2762     # 2022-08-07 18:44:34.005 [892491] pid 892491: SIGHUP received: re-exec daemon
2763     # 2022-08-07 18:44:34.036 [892491] cwd=/var/spool/exim4 5 args: /usr/sbin/exim4 -bd -q30m -C /etc/exim4/my.conf
2764     # 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)
2765     # note: the daemon gives up and dies after retrying those 9 times.
2766     # I came upon this by guessing and trial and error.
2767     setcap CAP_NET_BIND_SERVICE+ei /usr/sbin/exim4
2768     u /etc/exim4/trusted_configs <<'EOF'
2769 /etc/exim4/my.conf
2770 EOF
2771     ;;
2772   *)
2773     # default file
2774     u /etc/default/exim4 <<'EOF'
2775 QUEUERUNNER='combined'
2776 QUEUEINTERVAL='30m'
2777 EOF
2778     ;;
2779 esac
2780
2781 # ** exim non-root
2782
2783 case $HOSTNAME in
2784   bk|je|li)
2785     # no reason to expect it to ever be there.
2786     rm -fv /etc/systemd/system/exim4.service.d/nonroot.conf
2787     ;;
2788   *)
2789     dirs=()
2790     for d in /a /d /m /media /mnt /nocow /o /p /q; do
2791       if [[ -d $d ]]; then
2792         dirs+=($d)
2793       fi
2794     done
2795     u /etc/systemd/system/exim4.service.d/nonroot.conf <<EOF
2796 [Service]
2797 # see 56.2 Root privilege in exim spec
2798 AmbientCapabilities=CAP_NET_BIND_SERVICE
2799 # https://www.redhat.com/sysadmin/mastering-systemd
2800 # things that seem good and reasonabl.e
2801 PrivateTmp=yes
2802 ProtectHome=yes
2803 # note, in t10 systemd, if one of these is an sshfs mountpoint,
2804 # this whole setting doesnt work. tried it with a newer systemd 250 though
2805 # an nspawn, and it worked there.
2806 InaccessiblePaths=${dirs[@]}
2807 # this gives us the permission denied error:
2808 # socket bind() to port 25 for address (any IPv6) failed: Permission denied
2809 # but we also have to set the file capabilities to avoid the error.
2810 #NoNewPrivileges=yes
2811 ProtectSystem=yes
2812
2813 # when we get newer systemd
2814 #ProtectDevices=yes
2815 EOF
2816     u /etc/exim4/conf.d/main/000_local-noroot <<'EOF'
2817 # see 56.2 Root privilege in exim spec
2818 deliver_drop_privilege = true
2819 EOF
2820     files=(
2821       300_exim4-config_real_local
2822       600_exim4-config_userforward
2823       700_exim4-config_procmail
2824       800_exim4-config_maildrop
2825       mmm_mail4root
2826     )
2827     for f in ${files[@]}; do
2828       echo "# iank: removed due to running nonroot"|u /etc/exim4/conf.d/router/$f
2829     done
2830     ;;
2831 esac
2832
2833 case $HOSTNAME in
2834
2835   # ** $MAIL_HOST|bk|je)
2836   $MAIL_HOST|bk|je)
2837
2838     echo|u /etc/exim4/conf.d/router/165_backup_local
2839
2840     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2841 # note: some things we don't set that are here by default because they are unused.
2842 dc_local_interfaces=''
2843 dc_eximconfig_configtype='internet'
2844 dc_localdelivery='dovecot_lmtp'
2845 EOF
2846     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2847 # recommended if dns is expected to work
2848 CHECK_RCPT_VERIFY_SENDER = true
2849 # default config comment says: If you enable this, you might reject legitimate mail,
2850 # but eggs has had this a long time, so that seems unlikely.
2851 CHECK_RCPT_SPF = true
2852 CHECK_RCPT_REVERSE_DNS = true
2853 CHECK_MAIL_HELO_ISSUED = true
2854
2855
2856 CHECK_DATA_LOCAL_ACL_FILE = /etc/exim4/conf.d/data_local_acl
2857 CHECK_RCPT_LOCAL_ACL_FILE = /etc/exim4/conf.d/rcpt_local_acl
2858
2859 # testing dmarc
2860 #dmarc_tld_file = /etc/public_suffix_list.dat
2861
2862 EOF
2863     ;;&
2864
2865   # ** $MAIL_HOST|bk)
2866   $MAIL_HOST|bk)
2867
2868
2869     # no clamav on je, it has 1.5g memory and clamav uses most of it
2870     u /etc/exim4/conf.d/clamav_data_acl <<'EOF'
2871 warn
2872 !hosts = +iank_trusted
2873 !authenticated = plain_server:login_server
2874 condition = ${if def:malware_name}
2875 remove_header = Subject:
2876 add_header = Subject: [Clamav warning: $malware_name] $h_subject
2877 log_message = heuristic malware warning: $malware_name
2878 EOF
2879
2880     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2881 # je.b8.nz will run out of memory with freshclam
2882 av_scanner = clamd:/var/run/clamav/clamd.ctl
2883 EOF
2884
2885     cat >> /etc/exim4/conf.d/data_local_acl <<'EOF'
2886 deny
2887   malware = */defer_ok
2888   !condition = ${if match {$malware_name}{\N^Heuristic\N}}
2889   message = This message was detected as possible malware ($malware_name).
2890 EOF
2891
2892     cat >/etc/exim4/conf.d/main/000_local-nn <<EOF
2893 # MAIN_HARDCODE_PRIMARY_HOSTNAME might mess up the
2894 # smarthost config type, not sure.
2895 # failing message on mail-tester.com:
2896 # We check if there is a server (A Record) behind your hostname kd.
2897 # You may want to publish a DNS record (A type) for the hostname kd or use a different hostname in your mail software
2898 # https://serverfault.com/questions/46545/how-do-i-change-exim4s-primary-hostname-on-a-debian-box
2899 # and this one seemed appropriate from grepping config.
2900 # I originally set this to li.iankelling.org, but then ended up with errors when li tried to send
2901 # mail to kd, so this should basically be a name that no host has as their
2902 # canonical hostname since the actual host sits behind a nat and changes.
2903 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail.iankelling.org
2904 # I used this to avoid sender verification, didnt work but it still
2905 # makes sense based on the spec.
2906 hosts_treat_as_local = defaultnn.b8.nz
2907
2908 # Outside nn, we get the default cert location from a debian macro,
2909 # and the cert file is put in place by a certbot hook.
2910 MAIN_TLS_CERTIFICATE = /etc/exim4/fullchain.pem
2911 MAIN_TLS_PRIVATEKEY = /etc/exim4/privkey.pem
2912 EOF
2913
2914     u /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost <<'EOF'
2915 gnusmarthost:
2916   debug_print = "R: smarthost for $local_part@$domain"
2917   driver = manualroute
2918   domains = ! +local_domains
2919 # send most mail through eggs, helps fsfs sender reputation.
2920 # uncomment and optionally move to 188 file to send through my own servers again
2921   senders = *@gnu.org
2922   transport = smarthost_dkim
2923   route_list = * fencepost.gnu.org::587 byname
2924   host_find_failed = ignore
2925   same_domain_copy_routing = yes
2926   no_more
2927 EOF
2928
2929     /a/exe/cedit defaultnn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2930 10.173.8.1 defaultnn.b8.nz
2931 EOF
2932     ;;&
2933   # ** $MAIL_HOST)
2934   $MAIL_HOST)
2935
2936     u /etc/exim4/conf.d/router/195_dnslookup_vpn <<'EOF'
2937 # copied from /etc/exim4/conf.d/router/200_exim4-config_primary, but
2938 # use vpn transport. lower priority so it overrides the default route.
2939 # Use this in case our vpn fails, we dont send anything without it.
2940 .ifdef DCconfig_internet
2941 dnslookup_vpn:
2942   debug_print = "R: dnslookup for $local_part@$domain"
2943   driver = dnslookup
2944   domains = ! +local_domains
2945   transport = remote_smtp_vpn
2946   same_domain_copy_routing = yes
2947   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
2948   no_more
2949 .endif
2950 EOF
2951
2952
2953     # note on backups: I used to do an automatic sshfs and restricted
2954     # permissions to a specific directory on the remote server, /bu/mnt,
2955     # which required using a dedicated user, but realized smtp will be
2956     # more reliable and less fuss. If I ever need that again, see the
2957     # history of this file, and bum in brc2.
2958     u /etc/exim4/conf.d/router/161_backup_redir_nn <<'EOF'
2959 backup_redir_nn:
2960 driver = redirect
2961 # b is just an arbirary short string
2962 data = b@eximbackup.b8.nz
2963 condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
2964 # note, to test this, i could temporarily allow testignore.
2965 # alerts avoids potential mail loop. root is already
2966 # redirected earlier, so that is just being overly cautious.
2967 local_parts = ! root : ! testignore : ! alerts
2968 unseen = true
2969 errors_to = alerts@iankelling.org
2970 EOF
2971
2972
2973
2974     # This allows for forwarded mail to not get most rcpt checks, especially SPF,
2975     # which would incorrectly get denied.
2976     u /etc/exim4/host_local_deny_exceptions <<'EOF'
2977 mail.fsf.org
2978 *.posteo.de
2979 EOF
2980
2981     # cron email from smarthost hosts will automatically be to
2982     # USER@FQDN. I redirect that to alerts@, on the smarthosts, but in
2983     # case that doesn't work, we still want to accept that mail, but not
2984     # from any host except the smarthosts. local_hostnames and this rule
2985     # is for that purpose.
2986     u /etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2987 deny
2988   !authenticated = *
2989   domains = +local_hostnames
2990   message = no relay
2991
2992 # for testing bounce behavior
2993 #deny
2994 #  senders = testlist-bounces+test=zroe.org@fsf.org
2995 #  message = iank-bounce
2996 EOF
2997     echo|u /etc/exim4/conf.d/router/880_universal_forward
2998
2999
3000     cat >>/etc/exim4/conf.d/main/000_local <<EOF
3001 MAILDIR_HOME_MAILDIR_LOCATION = /m/md/Sent
3002 EOF
3003
3004
3005     u /etc/exim4/conf.d/router/186_sentarchive_nn <<'EOF'
3006 # ian: save a copy of sent mail. i thought of other ways to
3007 # do this, for example, to only save sent mail that is not sent
3008 # from my mail client which saves a copy by default, but in the
3009 # end, it seems simplest to turn that off. We want to save
3010 # external mail sent by smarthosts.
3011 sentarchive_nn:
3012   driver = redirect
3013   domains = ! +local_domains
3014   condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
3015   data    = vojdedIdNejyebni@b8.nz
3016   unseen
3017 EOF
3018
3019
3020     # for iank@fsf.org, i have mail.fsf.org forward it to fsf@iankelling.org.
3021     # and also have mail.iankelling.org whitelisted as a relay domain.
3022     # I could avoid that if I changed this to submit to 587 with a
3023     # password like a standard mua.
3024     u /etc/exim4/conf.d/router/188_exim4-config_smarthost <<'EOF'
3025 # ian: copied from /etc/exim4/conf.d/router/200_exim4-config_primary, and added senders = and
3026 # replaced DCsmarthost with hostname
3027 fsfsmarthost:
3028   debug_print = "R: smarthost for $local_part@$domain"
3029   driver = manualroute
3030   domains = ! +local_domains
3031   senders = *@fsf.org
3032   transport = remote_smtp_smarthost
3033   route_list = * mail.fsf.org::587 byname
3034   host_find_failed = ignore
3035   same_domain_copy_routing = yes
3036   no_more
3037
3038 posteosmarthost:
3039   debug_print = "R: smarthost for $local_part@$domain"
3040   driver = manualroute
3041   domains = ! +local_domains
3042   senders = *@posteo.net
3043   transport = remote_smtp_smarthost
3044   route_list = * posteo.de::587 byname
3045   host_find_failed = ignore
3046   same_domain_copy_routing = yes
3047   no_more
3048 EOF
3049
3050     # Greping /etc/exim4, unqualified mails this would end up as
3051     # a return path, so it should go somewhere we will see.
3052     # The debconf output about mailname is as follows:
3053     # The 'mail name' is the domain name used to 'qualify' mail addresses without a domain
3054     # name.
3055     # This name will also be used by other programs. It should be the single, fully
3056     # qualified domain name (FQDN).
3057     # Thus, if a mail address on the local host is foo@example.org, the correct value for
3058     # this option would be example.org.
3059     # This name won\'t appear on From: lines of outgoing messages if rewriting is enabled.
3060     echo iankelling.org > /etc/mailname
3061
3062
3063     # mail.iankelling.org so local imap clients can connect with tls and
3064     # when they happen to not be local.
3065     # todo: this should be 10.8.0.4
3066
3067     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
3068 # note: i put nn.b8.nz into bind for good measure
3069 10.173.8.2 nn.b8.nz mx.iankelling.org
3070 EOF
3071
3072     # note: systemd-resolved will consult /etc/hosts, dnsmasq wont. this assumes
3073     # weve configured this file in dnsmasq if we are using it.
3074     /a/exe/cedit mail /etc/dnsmasq-servers.conf <<'EOF' || [[ $? == 1 ]]
3075 server=/mx.iankelling.org/127.0.1.1
3076 EOF
3077     # I used to use debconf-set-selections + dpkg-reconfigure,
3078     # which then updates this file
3079     # but the process is slower than updating it directly and then I want to set other things in
3080     # update-exim4.conf.conf, so there's no point.
3081     # The file is documented in man update-exim4.conf,
3082     # except the man page is not perfect, read the bash script to be sure about things.
3083
3084     # The debconf questions output is additional documentation that is not
3085     # easily accessible, but super long, along with the initial default comment in this
3086     # file, so I've saved that into ./mail-notes.conf.
3087     #
3088     # # TODO: remove mx.iankelling.org once systems get updated mail-setup from jan 2022
3089     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3090 # man page: is used to build the local_domains list, together with "localhost"
3091 # this is duplicated in a later router.
3092 dc_other_hostnames='iankelling.org;zroe.org;r2e.iankelling.org;mx.iankelling.org;!je.b8.nz;!bk.b8.nz;*.b8.nz;b8.nz'
3093 dc_relay_nets='defaultnn.b8.nz'
3094 EOF
3095
3096
3097     # dmarc. not used currently
3098     f=/etc/cron.daily/refresh-dmarc-tld-file
3099     cat >$f <<'EOF'
3100 #!/bin/bash
3101 cd /etc
3102 wget -q -N https://publicsuffix.org/list/public_suffix_list.dat
3103 EOF
3104     m chmod 755 $f
3105
3106     ;;
3107   # ** bk
3108   ## we use this host to monitor MAIL_HOST and host a mail server for someone
3109   bk)
3110
3111
3112     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
3113 10.173.8.2 nn.b8.nz
3114 EOF
3115
3116     sed -r -f - /etc/init.d/exim4  <<'EOF' |u /etc/init.d/exim4in
3117 s,/etc/default/exim4,/etc/default/exim4in,g
3118 s,/run/exim4/exim.pid,/run/exim4/eximin.pid,g
3119 s,(^[ #]*Provides:).*,\1 exim4in,
3120 s,(^[ #]*NAME=).*,\1"exim4in",
3121 EOF
3122     chmod +x /etc/init.d/exim4in
3123     u /etc/systemd/system/exim4in.service.d/alwaysrestart.conf <<'EOF'
3124 [Unit]
3125 # needed to continually restart
3126 StartLimitIntervalSec=0
3127
3128 [Service]
3129 Restart=always
3130 # time to sleep before restarting a service
3131 RestartSec=20
3132 EOF
3133
3134     u /etc/default/exim4in <<'EOF'
3135 # defaults but no queue runner and alternate config dir
3136 QUEUERUNNER='no'
3137 COMMONOPTIONS='-oP /run/exim4/eximin.pid'
3138 UPEX4OPTS='-d /etc/myexim4'
3139 EOF
3140
3141     echo bk.b8.nz > /etc/mailname
3142     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3143 # man page: is used to build the local_domains list, together with "localhost"
3144 dc_other_hostnames='amnimal.ninja;expertpathologyreview.com;bk.b8.nz'
3145 EOF
3146
3147     ;;
3148   # ** je
3149   je)
3150     echo je.b8.nz > /etc/mailname
3151     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3152 dc_other_hostnames='je.b8.nz'
3153 EOF
3154     ;;
3155   # ** not MAIL_HOST|bk|je
3156   *)
3157     # this one should be removed for all non mail hosts, but
3158     # bk and je never become mail_host
3159     echo|u /etc/exim4/conf.d/router/195_dnslookup_vpn
3160     echo|u /etc/exim4/conf.d/router/160_backup_redir
3161     echo|u /etc/exim4/conf.d/router/161_backup_redir_nn
3162     echo|u /etc/exim4/conf.d/router/185_sentarchive
3163     echo|u /etc/exim4/conf.d/router/186_sentarchive_nn
3164     echo|u /etc/exim4/conf.d/router/188_exim4-config_smarthost
3165     echo|u /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
3166     echo|u /etc/exim4/conf.d/rcpt_local_acl
3167     echo|u /etc/exim4/conf.d/main/000_local-nn
3168     echo|u /etc/exim4/conf.d/clamav_data_acl
3169
3170
3171     if $bhost_t; then
3172       cat >>/etc/exim4/conf.d/main/000_local <<EOF
3173 MAIN_TLS_CERTIFICATE = /etc/exim4/certs/$wghost/fullchain.pem
3174 MAIN_TLS_PRIVATEKEY = /etc/exim4/certs/$wghost/privkey.pem
3175 # so we can maintiain the originals of the backups.
3176 # we wouldnt want this if we were dealing with any other
3177 # local deliveries, but we sent all others to the smarthost
3178 # which then strips the headers.
3179 envelope_to_remove = false
3180 return_path_remove = false
3181 EOF
3182     fi
3183
3184     # catches things like cronjob email
3185     u /etc/exim4/conf.d/router/880_universal_forward <<'EOF'
3186 universal_forward:
3187   driver = redirect
3188   domains = +local_domains
3189   data = alerts@iankelling.org
3190 EOF
3191
3192
3193     for unit in ${nn_progs[@]}; do
3194       f=/etc/systemd/system/$unit.service.d/nn.conf
3195       rm -fv $f
3196     done
3197
3198     # dont i dont care if defaultnn section gets left, it wont
3199     # get used.
3200     echo | /a/exe/cedit nn /etc/hosts || [[ $? == 1 ]]
3201     echo | /a/exe/cedit mail /etc/dnsmasq-servers.conf || [[ $? == 1 ]]
3202
3203     # note: condition duplicated at else
3204     if $bhost_t; then
3205       install -d /bu
3206       install -d -g Debian-exim -o Debian-exim -m 771 /bu/md
3207       if [[ -e /bu/md/cur && $(stat -c %u /bu/md/cur) == 1000 ]]; then
3208         chown -R Debian-exim:Debian-exim /bu/md
3209       fi
3210       u /etc/exim4/conf.d/transport/30_backup_maildir <<EOF
3211 # modified debian maildir transport
3212 backup_maildir:
3213   driver = appendfile
3214   directory = /bu/md
3215   delivery_date_add
3216   # note, no return path or envelope added
3217   maildir_format
3218   directory_mode = 0700
3219   mode = 0644
3220   mode_fail_narrower = false
3221 EOF
3222
3223       u /etc/exim4/conf.d/router/165_backup_local <<'EOF'
3224 ### router/900_exim4-config_local_user
3225 #################################
3226
3227 backup_local:
3228   debug_print = "R: local_user for $local_part@$domain"
3229   driver = accept
3230   domains = eximbackup.b8.nz
3231   transport = backup_maildir
3232 EOF
3233
3234       # Bind to wghole to receive mailbackup.
3235       wgholeip=$(sed -rn 's/^ *Address *= *([^/]+).*/\1/p' /etc/wireguard/wghole.conf)
3236       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3237 dc_other_hostnames='eximbackup.b8.nz'
3238 dc_local_interfaces='127.0.0.1;::1;$wgholeip'
3239 EOF
3240
3241       # wghole & thus exim will fail to start without internet connectivity.
3242       u /etc/systemd/system/exim4.service.d/backup.conf <<'EOF'
3243 [Unit]
3244 StartLimitIntervalSec=0
3245
3246 [Service]
3247 Restart=always
3248 RestartSec=20
3249 EOF
3250
3251     else  # if $bhost_t; then
3252       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3253 # Note: If theres like a temporary problem where mail gets sent to
3254 # one of these hosts, if exim isnt listening, it will be a temporary error
3255 # instead of a permanent 5xx.
3256 dc_local_interfaces='127.0.0.1;::1'
3257 EOF
3258       rm -fv /etc/systemd/system/exim4.service.d/backup.conf
3259     fi
3260     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3261 dc_eximconfig_configtype='smarthost'
3262 dc_smarthost='$smarthost'
3263 EOF
3264
3265     hostname -f |u /etc/mailname
3266     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
3267 # The manpage incorrectly states this will do header rewriting, but
3268 # that only happens if we have dc_hide_mailname is set.
3269 dc_readhost='iankelling.org'
3270 # Only used in case of bounces.
3271 dc_localdelivery='maildir_home'
3272 EOF
3273     ;;
3274 esac
3275
3276
3277
3278
3279 # ** $MAILHOST|bk, things that belong at the end
3280 case $HOSTNAME in
3281   $MAIL_HOST|bk)
3282     # config for the non-nn exim. note, it uses not default dir, but we
3283     # generate that into the default config file
3284     m rsync -ra --delete --delete-excluded \
3285       --exclude=/conf.d/router/161_backup_redir_nn \
3286       --exclude=/conf.d/router/186_sentarchive_nn \
3287       --exclude=/conf.d/main/000_local-nn /etc/exim4/ /etc/myexim4
3288     cat >>/etc/myexim4/conf.d/main/000_local <<'EOF'
3289 # this makes it easier to see which exim is doing what
3290 log_file_path = /var/log/exim4/my%s
3291 EOF
3292
3293
3294
3295     cat >/etc/logrotate.d/myexim <<'EOF'
3296 /var/log/exim4/mymain /var/log/exim4/myreject {
3297         daily
3298         missingok
3299         rotate 1000
3300         delaycompress
3301         notifempty
3302         nocreate
3303 }
3304 /var/log/exim4/mypanic {
3305         size 10M
3306         missingok
3307         rotate 10
3308         compress
3309         delaycompress
3310         notifempty
3311         nocreate
3312 }
3313 EOF
3314
3315     # If we ever wanted to have a separate spool,
3316     # we could do it like this.
3317     #     cat >>/etc/exim4/conf.d/main/000_local-nn <<'EOF'
3318     # spool_directory = /var/spool/myexim4
3319     # EOF
3320     cat >>/etc/myexim4/update-exim4.conf.conf <<'EOF'
3321 dc_eximconfig_configtype='smarthost'
3322 dc_smarthost='nn.b8.nz'
3323 EOF
3324     ;;&
3325   bk)
3326
3327     # config for the non-nn exim
3328     cat >>/etc/myexim4/conf.d/main/000_local <<'EOF'
3329 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail2.iankelling.org
3330 EOF
3331     ;;
3332   $MAIL_HOST)
3333
3334
3335     u /etc/myexim4/conf.d/router/185_sentarchive <<'EOF'
3336 sentarchive:
3337   driver = redirect
3338   domains = ! +local_domains
3339   senders = <; *@fsf.org ; *@posteo.net
3340   condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
3341   data    = vojdedIdNejyebni@b8.nz
3342   unseen
3343 EOF
3344
3345     u /etc/myexim4/conf.d/router/160_backup_redir <<'EOF'
3346 backup_redir:
3347 driver = redirect
3348 # i dont email myself from my own machine much, so lets ignore that.
3349 domains = ! +local_domains
3350 senders = <; *@fsf.org ; *@posteo.net
3351 condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
3352 # b is just an arbirary short string
3353 data = b@eximbackup.b8.nz
3354 # note, to test this, i could temporarily allow testignore.
3355 # alerts avoids potential mail loop.
3356 local_parts = ! root : ! testignore : ! alerts : ! daylert
3357 unseen = true
3358 errors_to = alerts@iankelling.org
3359 EOF
3360
3361     # for bk, we have a exim4in.service that will do this for us.
3362     m update-exim4.conf -d /etc/myexim4
3363     ;;
3364 esac
3365
3366 # * spool dir setup
3367
3368 # ** bind mount setup
3369 # put spool dir in directory that spans multiple distros.
3370 # based on http://www.postfix.org/qmgr.8.html and my notes in gnus
3371 #
3372 dir=/nocow/exim4
3373 sdir=/var/spool/exim4
3374 # we only do this if our system has $dir
3375
3376 # this used to do a symlink, but, in the boot logs, /nocow would get mounted succesfully,
3377 # about 2 seconds later, exim starts, and immediately puts into paniclog:
3378 # honVi-0000u3-82 Failed to create directory "/var/spool/exim4/input": No such file or directory
3379 # so, im trying a bind mount to get rid of that.
3380 if [[ -e /nocow ]]; then
3381   if ! grep -Fx "/nocow/exim4  /var/spool/exim4  none  bind  0 0" /etc/fstab; then
3382     echo "/nocow/exim4  /var/spool/exim4  none  bind  0 0" >>/etc/fstab
3383   fi
3384   u /etc/systemd/system/exim4.service.d/override.conf <<'EOF'
3385 [Unit]
3386 # without local-fs on exim, we get these kind of errors in paniclog on shutdown:
3387 # Failed to create spool file /var/spool/exim4//input//1jCLxz-0008V4-V9-D: Permission denied
3388 After=local-fs.target
3389
3390 [Service]
3391 ExecStartPre=/usr/local/bin/exim-nn-iptables
3392 EOF
3393   if ! mountpoint -q $sdir; then
3394     stopifactive exim4 exim4in
3395     if [[ -L $sdir ]]; then
3396       m rm $sdir
3397     fi
3398     if [[ ! -e $dir && -d $sdir ]]; then
3399       m mv $sdir $dir
3400     fi
3401     if [[ ! -d $sdir ]]; then
3402       m mkdir $sdir
3403       m chmod 000 $sdir # only want it to be used when its mounted
3404     fi
3405     m mount $sdir
3406   fi
3407 fi
3408
3409
3410
3411 # ** exim/spool uid setup
3412 # i have the spool directory be common to distro multi-boot, so
3413 # we need the uid to be the same. 608 cuz it's kind of in the middle
3414 # of the free system uids.
3415 IFS=:; read -r _ _ uid _ < <(getent passwd Debian-exim ||:) ||:; unset IFS
3416 IFS=:; read -r _ _ gid _ < <(getent group Debian-exim ||:) ||:; unset IFS
3417 if [[ ! $uid ]]; then
3418   # from /var/lib/dpkg/info/exim4-base.postinst, plus uid and gid options
3419   m adduser --uid 608 --system --group --quiet --home /var/spool/exim4 \
3420     --no-create-home --disabled-login --force-badname Debian-exim
3421 elif [[ $uid != 608 ]]; then
3422   stopifactive exim4 exim4in
3423   m usermod -u 608 Debian-exim
3424   m groupmod -g 608 Debian-exim
3425   m usermod -g 608 Debian-exim
3426   m find / /nocow -xdev -path ./var/tmp -prune -o -uid $uid -execdir chown -h 608 {} +
3427   m find / /nocow -xdev -path ./var/tmp -prune -o -gid $gid -execdir chgrp -h 608 {} +
3428 fi
3429
3430 # * start / stop services
3431
3432 reifactive dnsmasq nscd
3433
3434 if $reload; then
3435   m systemctl daemon-reload
3436 fi
3437
3438 # optimization, this only needs to run once.
3439 if [[ ! -e /sys/class/net/wghole ]]; then
3440   # checking bhost_t is redundant, but could help us catch errors.
3441   if $bhost_t || [[ -e /etc/wireguard/wghole.conf ]]; then
3442     # todo: in mail-setup, we have a static list of backup hosts, not *y
3443     m systemctl --now enable wg-quick@wghole
3444   fi
3445 fi
3446
3447 # optimization, this only needs to be run once
3448 if [[ ! -e /var/lib/prometheus/node-exporter/exim_paniclog.prom ]]; then
3449   sysd-prom-fail-install epanicclean
3450   m systemctl --now enable epanicclean
3451 fi
3452
3453 case $HOSTNAME in
3454   je)
3455     /a/exe/web-conf apache2 je.b8.nz
3456     ;;
3457   bk)
3458     /a/exe/web-conf apache2 mail2.iankelling.org
3459     ;;
3460 esac
3461
3462 # optimization, this only needs to run once.
3463 if [[ ! -e /etc/exim4/fullchain.pem ]]; then
3464   m /a/bin/ds/mail-cert-cron -1
3465   m systemctl --now enable mailcert.timer
3466 fi
3467
3468 case $HOSTNAME in
3469   $MAIL_HOST|bk)
3470     m systemctl --now enable mailnn mailnnroute
3471     ;;&
3472   $MAIL_HOST)
3473     # we use dns to start wg
3474     if $reload; then
3475       sre unbound
3476     else
3477       m systemctl --now enable unbound
3478     fi
3479     ;;&
3480   $MAIL_HOST|bk)
3481     # If these have changes, id rather manually restart it, id rather
3482     # not restart and cause temporary errors
3483     if $reload; then
3484       sre $vpnser
3485     else
3486       m systemctl --now enable $vpnser
3487     fi
3488     if ! systemctl is-active clamav-daemon >/dev/null; then
3489       m systemctl --now enable clamav-daemon
3490       out=$(rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/filesystem/etc/systemd/system/epanicclean.service /etc/systemd/system)
3491       if [[ $out ]]; then
3492         reload=true
3493       fi
3494
3495       # note, this will cause paniclog entries because it takes like 45
3496       # seconds for clamav to start, i use ./epanic-clean to remove
3497       # them.
3498     fi
3499     ;;&
3500   $MAIL_HOST|bk|je)
3501     # start spamassassin/dovecot before exim.
3502     sre dovecot spamassassin
3503     # Wait a bit before restarting exim, else I get a paniclog entry
3504     # like: spam acl condition: all spamd servers failed. But I'm tired
3505     # of waiting. I'll deal with this some other way.
3506     #
3507     # sleep 3
3508     m systemctl --now enable mailclean.timer
3509     ;;&
3510   $MAIL_HOST)
3511     # < 2.1 (eg: in t9), uses a different data format which required manual
3512     # migration. dont start if we are running an old version.
3513     if dpkg --compare-versions "$(dpkg -s radicale | awk '$1 == "Version:" { print $2 }')" ge 2.1; then
3514       m systemctl --now enable radicale
3515     fi
3516     ;;&
3517 esac
3518
3519 # for debugging dns issues
3520 case $HOSTNAME in
3521   je|bk)
3522     systemctl enable --now logrotate-fast.timer
3523     ;;
3524 esac
3525
3526 # last use of $reload happens in previous block
3527 rm -f /var/local/mail-setup-reload
3528
3529
3530 case $HOSTNAME in
3531   $MAIL_HOST|bk|je|li)
3532     # on li, these are never started, except $vpnser
3533     :
3534     ;;
3535   *)
3536     soff radicale mailclean.timer dovecot spamassassin $vpnser mailnn clamav-daemon
3537     ;;
3538 esac
3539
3540 sre exim4
3541
3542 case $HOSTNAME in
3543   $MAIL_HOST)
3544     m systemctl --now enable mailbindwatchdog
3545     ;;
3546   *)
3547     soff mailbindwatchdog
3548     ;;
3549 esac
3550
3551
3552 case $HOSTNAME in
3553   bk) sre exim4in ;;
3554 esac
3555
3556 # * mail monitoring / testing
3557
3558 # note, to test clamav, send an email with body that only contains
3559 # https://en.wikipedia.org/wiki/EICAR_test_file
3560 # which set malware_name to Eicar-Signature
3561 case $HOSTNAME in
3562   $MAIL_HOST|bk|je)
3563     # note: cronjob "ian" also does some important monitoring
3564     # todo: this will sometimes cause an alert because mailtest-check will run
3565     # before we have setup network namespace and spamassassin
3566     u /etc/cron.d/mailtest <<EOF
3567 SHELL=/bin/bash
3568 PATH=/usr/bin:/bin:/usr/local/bin
3569 MAILTO=daylert@iankelling.org
3570 */5  * * * *   $u send-test-forward |& log-once send-test-forward
3571 */10 * * * *   root chmod -R g+rw /m/md/bounces |& log-once -1 bounces-chmod
3572 # if a bounce happened yesterday, dont let it slip through the cracks
3573 8   1 * * *   root export MAILTO=alerts@iankelling.org; [[ -s /var/log/exim4/mainlog.1 ]] && awk '\$5 == "**"' /var/log/exim4/mainlog.1
3574 EOF
3575
3576
3577     m sudo rsync -ahhi --chown=root:root --chmod=0755 \
3578       /b/ds/mailtest-check /b/ds/check-remote-mailqs /usr/local/bin/
3579     u /etc/systemd/system/mailtest-check.service <<'EOF'
3580 [Unit]
3581 Description=mailtest-check
3582 After=local-fs.target
3583 StartLimitIntervalSec=0
3584
3585 [Service]
3586 Type=simple
3587 ExecStart=/usr/local/bin/mailtest-check slow
3588 Restart=always
3589 RestartSec=60
3590
3591 [Install]
3592 WantedBy=graphical.target
3593 EOF
3594     sysd-prom-fail-install mailtest-check
3595     sre mailtest-check
3596     ;;&
3597   $MAIL_HOST)
3598     test_froms=(ian@iankelling.org z@zroe.org iank@gnu.org)
3599     test_tos=(testignore@expertpathologyreview.com testignore@je.b8.nz testignore@amnimal.ninja jtuttle@gnu.org)
3600
3601     cat >>/etc/cron.d/mailtest <<EOF
3602 # 10 am friday
3603 0   10 * * 5  root echo "weekly alert. You are not in the matrix."
3604 2   * * * *   root check-remote-mailqs |& log-once check-remote-mailqs
3605 EOF
3606     ;;&
3607   bk)
3608     test_froms=(testignore@amnimal.ninja testignore@expertpathologyreview.com)
3609     test_tos=(testignore@iankelling.org testignore@je.b8.nz)
3610     # We dont need to send from different addresses to the same
3611     # address. this breaks down our nice elegant logic of building up
3612     # froms and tos , so I just handle expertpath in a special case
3613     # below and set the to: to be testignore@zroe.org.  If we did sent
3614     # that way, it would also mess up our mailtest-check logic that
3615     # finds which messages to check.
3616     # for example: from testignore@amnimal.ninja to: testignore@iankelling.org testignore@zroe.org
3617     # that would become 2 messages and we'd only check 1.
3618     ;;&
3619   je)
3620     test_froms=(testignore@je.b8.nz)
3621     test_tos=(testignore@iankelling.org testignore@zroe.org testignore@expertpathologyreview.com testignore@amnimal.ninja)
3622     ;;&
3623   $MAIL_HOST|bk|je)
3624
3625     # Dont put these test messages into the sent folder or else it will
3626     # overwhelm it, plus i dont want to save a copy at all.
3627     # Plus addresses we generally want to ignore.
3628     u /etc/exim4/ignore-sent <<EOF
3629 $(printf "%s\n" ${test_tos[@]})
3630 vojdedIdNejyebni@b8.nz
3631 b@eximbackup.b8.nz
3632 EOF
3633
3634     cat >/usr/local/bin/send-test-forward <<'EOF'
3635 #!/bin/bash
3636 # we remove from the queue older than 4.3 minutes since we send every 5 minutes.
3637 olds=(
3638 $(/usr/sbin/exiqgrep -o 260 -i -r '^(testignore@(iankelling\.org|zroe\.org|expertpathologyreview\.com|amnimal\.ninja|je\.b8\.nz)|jtuttle@gnu\.org)$')
3639 )
3640 if (( ${#olds[@]} )); then
3641   /usr/sbin/exim -Mrm "${olds[@]}" >/dev/null
3642 fi
3643 EOF
3644     for test_from in ${test_froms[@]}; do
3645
3646       test_to=${test_tos[0]}
3647       for t in ${test_tos[@]:1}; do
3648         test_to+=", $t"
3649       done
3650       case $test_from in
3651         testignore@expertpathologyreview.com)
3652           test_to=testignore@zroe.org
3653           ;;
3654       esac
3655
3656       cat >>/usr/local/bin/send-test-forward <<EOFOUTER
3657 /usr/sbin/exim -odf -f $test_from -t <<EOF
3658 From: $test_from
3659 To: $test_to
3660 Subject: test \$(date +%Y-%m-%dT%H:%M:%S%z) \$EPOCHSECONDS
3661
3662 /usr/local/bin/send-test-forward
3663 EOF
3664 EOFOUTER
3665     done
3666     m chmod +x /usr/local/bin/send-test-forward
3667     ;;
3668   *)
3669     soff mailtest-check.service
3670     rm -fv /etc/cron.d/mailtest \
3671        /var/lib/prometheus/node-exporter/mailtest-check.prom* \
3672        /var/local/cron-errors/check-remote-mailqs*
3673     ;;
3674 esac
3675
3676
3677
3678 # * misc
3679 m sudo -u $u mkdir -p /home/$u/.cache
3680 set -- /m/mucache /home/$u/.cache/mu /m/.mu /home/$u/.mu
3681 while (($#)); do
3682   target=$1
3683   f=$2
3684   shift 2
3685   if [[ ! -L $f ]]; then
3686     if [[ -e $f ]]; then
3687       rm -rf $f
3688     fi
3689     m sudo -u $u ln -sf -T $target $f
3690   fi
3691 done
3692
3693
3694 # /etc/alias setup is debian specific, and exim postinst script sets up
3695 # an /etc/alias from root to the postmaster, based on the question
3696 # exim4-config exim4/dc_postmaster, as long as there exists an entry for
3697 # root, or there was no preexisting aliases file. postfix won\'t set up
3698 # a root to $postmaster alias if it\'s already installed. Easiest to
3699 # just set it ourselves.
3700
3701 # debconf question for postmaster:
3702 # Mail for the 'postmaster', 'root', and other system accounts needs to be redirected
3703 # to the user account of the actual system administrator.
3704 # If this value is left empty, such mail will be saved in /var/mail/mail, which is not
3705 # recommended.
3706 # Note that postmaster\'s mail should be read on the system to which it is directed,
3707 # rather than being forwarded elsewhere, so (at least one of) the users listed here
3708 # should not redirect their mail off this machine. A 'real-' prefix can be used to
3709 # force local delivery.
3710 # Multiple user names need to be separated by spaces.
3711 # Root and postmaster mail recipient:
3712
3713 m exit 0
3714 :
3715
3716 # Local Variables:
3717 # eval: (outline-minor-mode)
3718 # outline-regexp: "\\( *\\)# [*]\\{1,8\\} "
3719 # End:
3720 # this is combined with defining outline-level in init.el