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
   7 # todo: setup an alert for bouncing test emails.
   8
   9 # todo: bounces to my fsf mail can come from fsf@iankelling.org,
  10 # think about making bounces go from the original address.
  11
  12 # todo: add a prometheus alert for dovecot.
  13
  14 # todo: handle errors like this:
  15 # Mar 02 12:44:26 kw systemd[1]: exim4.service: Found left-over process 68210 (exim4) in control group while starting unit. Ignoring.
  16 # Mar 02 12:44:26 kw systemd[1]: This usually indicates unclean termination of a previous run, or service implementation deficiencies.
  17 #eg: on eggs, on may 1st, ps grep for exim, 2 daemons running. 1 leftover from a month ago
  18 #Debian-+  1954     1  0 36231 11560   4 Apr02 ?        00:40:25 /usr/sbin/exim4 -bd -q30m
  19 #Debian-+ 23058  1954  0 36821 10564   0 20:38 ?        00:00:00 /usr/sbin/exim4 -bd -q30m
  20
  21 #  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.
  22 #  todo: consider hardening cups listening on 0.0.0.0
  23 #  todo: stop/disable local apache, and rpc.mountd, and kdeconnect when not in use.
  24
  25 # todo:  hosts should only allow external mail that is authed and
  26 # destined for backup route. it is a minor issue since traffic is
  27 # limited to the wghole network.
  28
  29 # todo: emailing info@amnimal.ninja produces a bounce, user doesn't exist
  30 # instead of a simple rejection like it should.
  31
  32 # todo: run mailping test after running, or otherwise
  33 # clear out terminal alert
  34
  35 # todo: disable postgrey
  36
  37 # todo: in testforward-check, we should also look
  38
  39 # todo: test that bounces dont help create valid mailtest-check
  40
  41 # todo: move mail stuff in distro-end into this file
  42
  43 # todo: consider rotating dkim & publishing key so every past email I sent
  44 # isnt necessarily signed
  45
  46 # todo: consider how to get clamav out of Debian-exim group
  47 # so it cant read/write the whole mail spool, for better
  48 # security.
  49
  50 # todo: create a cronjob to update or warn on expiring dnssec keys
  51
  52 # todo: we should test failed mail daily or so
  53 # failed cronjob, failed sysd-log-once,
  54 # a local bounce from a cronjob, a local bounce
  55 # to a bad remote address, perhaps a local failure
  56 # when the sending daemon is down.
  57 # And send an alert email if no alerts have been sent
  58 # in 2 or 3 days or something. todo, test cron mail on li.
  59
  60 # todo: look at mailinabox extra dns records, note these changelogs:
  61 # - 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.
  62 # - 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.
  63 #
  64
  65 # todo: mailtest-check failure on remote hosts is not going to alert me.
  66 # sort that out.
  67 # todo: test mail failure as well as success.
  68 #
  69 # todo: validate that mailtest-check is doing dnsbl checks.
  70
  71 # background: I want to run exim in a network namespace so it can send
  72 # and receive through a vpn. This is needed so it can do ipv6, because
  73 # outside the namespace if we dont have ipv6, to send ipv6 through the
  74 # vpn, we have to send all our ipv6 through the vpn. I did this for a
  75 # long time, it was fine, but it causes various pains, like increased
  76 # latency, increased recaptcha because my ip is from a data center, just
  77 # various issues I dont want on all the time. The problem with the
  78 # namespace is that all kinds of programs want to invoke exim, but they
  79 # wont be in the namespace. I could replace exim with a wrapper that
  80 # jumps into the namespace, i tried that, it works fine.  One remaining
  81 # problem was that I would have needed to hook into exim upgrades to
  82 # move exim and replace it with my wrapper script. Also, my script to
  83 # join the namespace is not super reliable because it uses a pgrep.
  84 # Instead, I should have created a systemd service for a process that
  85 # will never die and just writes its pid somewhere convenient.
  86 # That implementation
  87 # is below here:
  88 #
  89 # sudoers:
  90 # user ALL=(ALL) /usr/sbin/exim4
  91 #
  92 # move exim4 to eximian, use this script for exim4:
  93 #
  94 # #!/bin/bash
  95 # if ip a show veth1-mail &>/dev/null; then
  96 #   /usr/sbin/eximian "$@"
  97 #   exit
  98 # fi
  99 # dosudo=false
 100 # if [[ $USER && $USER != root ]]; then
 101 #   dosudo=true
 102 # fi
 103 # pid=$(pgrep -f "/usr/sbin/openvpn .* --config /etc/openvpn/.*mail.conf")
 104 # if $dosudo; then
 105 #   sudo nsenter -t $pid -n -m sudo -u $USER /usr/sbin/eximian "$@"
 106 # else
 107 #   nsenter -t $pid -n -m /usr/sbin/eximian "$@"
 108 # fi
 109 # ## end script
 110 #
 111 # an alternate solution: there is a small setguid program for
 112 # network namespaces in my bookmarks.
 113 #
 114 # However, the solution I went with is: have 2 exim
 115 # configs. A nonstandard location for the daemon that runs
 116 # in the namespace. For all other invocations, it uses
 117 # the default config location, which is altered to be
 118 # in a smarthost config which sends mail to the deaemon.
 119 #
 120 # I have a bash function, enn to invoke exim like the daemon is running.
 121 # and mailbash to just enter its network namespace.
 122
 123 if [ -z "$BASH_VERSION" ]; then echo "error: shell is not bash" >&2; exit 1; fi
 124
 125 shopt -s nullglob
 126
 127 if [[ -s /usr/local/lib/err ]]; then
 128   source /usr/local/lib/err
 129 elif [[ -s /a/bin/errhandle/err ]]; then
 130   source /a/bin/errhandle/err
 131 else
 132   err "no err tracing script found"
 133 fi
 134 source /a/bin/distro-functions/src/identify-distros
 135 source /a/bin/distro-functions/src/package-manager-abstractions
 136
 137 # has nextcloud_admin_pass in it
 138 f=/p/c/machine_specific/$HOSTNAME/mail
 139 if [[ -e $f ]]; then
 140   # shellcheck source=/p/c/machine_specific/bk/mail
 141   source $f
 142 fi
 143
 144
 145 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
 146
 147 # note, this is hardcoded in /etc/exim4/conf.d/main/000_local
 148 u=$(id -nu 1000)
 149
 150
 151 usage() {
 152   cat <<EOF
 153 Usage: ${0##*/} anything_here_to_debug
 154 Setup exim4 & dovecot & related things
 155
 156 -h|--help  Print help and exit.
 157 EOF
 158   exit $1
 159 }
 160
 161 # debug output if we pass any arg
 162 if (( $# )); then
 163   set -x
 164 fi
 165
 166
 167 ####### instructions for icedove #####
 168 # Incoming mail server: mail.iankelling.org, port 143, username iank, connection security starttls, authentication method normal password,
 169 # then click advanced so it accepts it.
 170 # we could also just use 127.0.0.1 with no ssl
 171 #
 172 # hamburger -> preferences -> preferences -> advanced tab -> config editor button -> security.ssl.enable_ocsp_must_staple = false
 173 # background: dovecot does not yet have ocsp stapling support
 174 # reference: https://community.letsencrypt.org/t/simple-guide-using-lets-encrypt-ssl-certs-with-dovecot/2921
 175 #
 176 # for phone, k9mail, fdroid, same thing but username alerts, pass in ivy-pass.
 177 # also, bk.b8.nz for secondary alerts, username is iank. same alerts pass.
 178 # fetching mail settings: folder poll frequency 10 minutes.
 179 # account settings, fetching mail, push folders: All. Then disable the persistent notification.
 180 #######
 181
 182
 183 # * perstent password instructions
 184 # Note: for cert cron, we need to manually run first to accept known_hosts
 185
 186 # # exim passwords:
 187 # # for hosts which have all private files I just use the same user
 188 # # for other hosts, each one get\'s their own password.
 189 # # for generating secure pass, and storing for server too:
 190 # f=$(mktemp)
 191 # host=tp
 192 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$f
 193 # s sed -i "/^$host:/d" /p/c/filesystem/etc/exim4/passwd
 194 # echo "$host:$(mkpasswd -m sha-512 -s <$f)" >>/p/c/filesystem/etc/exim4/passwd
 195 # #reference: exim4_passwd_client(5)
 196 # dir=/p/c/machine_specific/$host/filesystem/etc/exim4
 197 # mkdir -p $dir
 198 # echo "mail.iankelling.org:$host:$(<$f)" > $dir/passwd.client
 199 # # then run this script
 200
 201 # # dovecot password, i just need 1 as I\'m the only user
 202 # mkdir /p/c/filesystem/etc/dovecot
 203 # echo "iank:$(doveadm pw -s SHA512-CRYPT)::::::" >>/p/c/filesystem/etc/dovecot/users
 204
 205 ####### end perstent password instructions ######
 206
 207
 208 # * dkim dns
 209 # # Remove 1 level of comments in this section, set the domain var
 210 # # for the domain you are setting up, then run this and copy dns settings
 211 # # into dns.
 212 # domain=iankelling.org
 213 # c /p/c/filesystem/etc/exim4
 214 # # this has several bugs addressed in comments, but it was helpful
 215 # # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
 216
 217 # openssl genrsa -out $domain-private.pem 2048
 218 # # Then, to get the public key strings to put in bind:
 219
 220 # # selector is needed for having multiple keys for one domain.
 221 # # I dun do that, so just use a static one: li
 222 # # Debadmin page does not have v=, fastmail does, and this
 223 # # says it\'s recommended in 3.6.1, default is DKIM1 anyways.
 224 # # https://www.ietf.org/rfc/rfc6376.txt
 225 # # Join and print all but first and last line.
 226 # # last line: swap hold & pattern, remove newlines, print.
 227 # # lines 2+: append to hold space
 228 # echo "bind txt record: remember to truncate $domain so its relative to the bind zone"
 229 # cat <<EOF
 230 # a._domainkey.$domain  TXT     (
 231 # "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')" )
 232 # EOF
 233 # # sed explanation: skip the first few lines, then put them into the hold space, then
 234 # # on the last line, back to the patern space, remove the newlines, then add a newline
 235 # # at the last char - 240, because bind txt records need strings <=255 chars,
 236 # # other dkim stuff at the begining is is 25 chars, and the pubkey is 393, so this
 237 # # leaves us a bit of extra room at the end and a bunch at the beginning.
 238
 239 # # selector was also put into /etc/exim4/conf.d/main/000_local,
 240
 241 # * dmarc dns
 242
 243 # # 2017-02 dmarc policies:
 244 # # host -t txt _dmarc.gmail.com
 245 # # yahoo: p=reject, hotmail: p=none, gmail: p=none, fastmail none for legacy reasons
 246 # # there were articles claiming gmail would be  changing
 247 # # to p=reject, in early 2017, which didn\'t happen. I see no sources on them. It\'s
 248 # # expected to cause problems
 249 # # with a few old mailing lists, copying theirs for now.
 250 #
 251 # echo "dmarc dns, name: _dmarc value: v=DMARC1; p=none; rua=mailto:mailauth-reports@$domain"
 252
 253 # * other dns
 254
 255 # # 2017-02 spf policies:
 256 # # host -t txt lists.fedoraproject.org
 257 # # google ~all, hotmail ~all, yahoo: ?all, fastmail ?all, outlook ~all
 258 # # i include fastmail\'s settings, per their instructions,
 259 # # and follow their policy. In mail in a box, or similar instructions,
 260 # # I\'ve seen recommended to not use a restrictive policy.
 261
 262 # # to check if dns has updated, you do
 263 # host -a mesmtp._domainkey.$domain
 264
 265 # # mx records,
 266 # # setting it to iankelling.org would work the same, but this
 267 # # is more flexible, I could change where mail.iankelling.org pointed.
 268 # cat <<'EOF'
 269 # mx records, 2 records each, for * and empty domain
 270 # pri 10 mail.iankelling.org
 271 # EOF
 272
 273 # # dnssec
 274 # from brc2, run dnsecgen then dsign, update named.local.conf, publish keys to registrar
 275
 276 # * functions & constants
 277
 278 pre="${0##*/}:"
 279 m() { printf "$pre %s\n"  "$*"; "$@"; }
 280 e() { printf "$pre %s\n"  "$*"; }
 281 err() { printf "$pre %s\n"  "$*" >&2; exit 1; }
 282
 283 reload=false
 284 # This file is so if we fail in the middle and rerun, we dont lose state
 285 if [[ -e /var/local/mail-setup-reload ]]; then
 286   reload=true
 287 fi
 288 i() { # install file
 289   local tmp tmpdir dest="$1"
 290   local base="${dest##*/}"
 291   local dir="${dest%/*}"
 292   if [[ $dir != "$base" ]]; then
 293     # dest has a directory component
 294     mkdir -p "$dir"
 295   fi
 296   ir=false # i result
 297   tmpdir=$(mktemp -d)
 298   cat >$tmpdir/"$base"
 299   tmp=$(rsync -ic $tmpdir/"$base" "$dest")
 300   if [[ $tmp ]]; then
 301     printf "%s\n" "$tmp"
 302     ir=true
 303     if [[ $dest == /etc/systemd/system/* ]]; then
 304       touch /var/local/mail-setup-reload
 305       reload=true
 306     fi
 307   fi
 308   rm -rf $tmpdir
 309 }
 310 setini() {
 311   key="$1" value="$2" section="$3"
 312   file="/etc/radicale/config"
 313   sed -ri "/ *\[$section\]/,/^ *\[[^]]+\]/{/^\s*${key}[[:space:]=]/d};/ *\[$section\]/a $key = $value" "$file"
 314 }
 315 soff () {
 316   for service; do
 317     # ignore services that dont exist
 318     if systemctl cat $service &>/dev/null; then
 319       m systemctl disable --now $service
 320     fi
 321   done
 322 }
 323 sre() {
 324   for service; do
 325     m systemctl restart $service
 326     m systemctl enable $service;
 327   done
 328 }
 329 mailhost() {
 330   [[ $HOSTNAME == "$MAIL_HOST" ]]
 331 }
 332 e() { printf "%s\n" "$*"; }
 333 reifactive() {
 334   for service; do
 335     if systemctl is-active $service >/dev/null; then
 336       m systemctl restart $service
 337     fi
 338   done
 339 }
 340 stopifactive() {
 341   for service; do
 342     if systemctl is-active $service >/dev/null; then
 343       m systemctl stop $service
 344     fi
 345   done
 346 }
 347
 348 mxhost=mx.iankelling.org
 349 mxport=587
 350
 351 # old setup. left as comment for example
 352 # mxhost=mail.messagingengine.com
 353 # mxport=587
 354 # forward=ian@iankelling.org
 355
 356 smarthost="$mxhost::$mxport"
 357 uhome=$(eval echo ~$u)
 358
 359 # Somehow on one machine, a file got written with 664 perms.
 360 # just being defensive here.
 361 umask 0022
 362
 363 source /a/bin/bash_unpublished/source-state
 364 if [[ ! $MAIL_HOST ]]; then
 365   err "\$MAIL_HOST not set"
 366 fi
 367
 368 bhost_t=false
 369 case $HOSTNAME in
 370   $MAIL_HOST) : ;;
 371   kd|frodo|x2|x3|kw|sy|bo)
 372     bhost_t=true
 373     ;;
 374 esac
 375
 376
 377 # * Install universal packages
 378
 379
 380 # installs epanicclean iptables-exim ip6tables-exim
 381 /a/bin/ds/install-my-scripts
 382
 383 if [[ $(debian-codename-compat) == bionic ]]; then
 384   cat >/etc/apt/preferences.d/spamassassin <<'EOF'
 385 Package: spamassassin sa-compile spamc
 386 Pin: release n=focal,o=Ubuntu
 387 Pin-Priority: 500
 388 EOF
 389 fi
 390
 391 # light version of exim does not have sasl auth support.
 392 # note: for bitfolk hosts, unbound has important config with conflink.
 393 pi-nostart exim4 exim4-daemon-heavy spamassassin unbound clamav-daemon wireguard
 394
 395 # note: pyzor debian readme says you need to run some initialization command
 396 # but its outdated.
 397 pi spf-tools-perl p0f postgrey pyzor razor jq moreutils certbot fail2ban
 398 case $HOSTNAME in
 399   je) : ;;
 400   # not included due to using wireguard: openvpn
 401   *) pi wget git unzip iptables ;;
 402 esac
 403 # bad packages that sometimes get automatically installed
 404 pu openresolv resolvconf
 405
 406 soff openvpn
 407
 408
 409 if [[ $(debian-codename) == etiona ]]; then
 410   # ip6tables stopped loading on boot. openvpn has reduced capability set,
 411   # so running iptables as part of openvpn startup wont work. This should do it.
 412   pi iptables-persistent
 413   cat >/etc/iptables/rules.v6 <<'EOF'
 414 *mangle
 415 COMMIT
 416 *nat
 417 COMMIT
 418 EOF
 419   # load it now.
 420   m ip6tables -S >/dev/null
 421 fi
 422
 423 # our nostart pi fails to avoid enabling
 424
 425
 426 # * Mail clean cronjob
 427
 428 i /etc/systemd/system/mailclean.timer <<'EOF'
 429 [Unit]
 430 Description=Run mailclean daily
 431
 432 [Timer]
 433 OnCalendar=monthly
 434
 435 [Install]
 436 WantedBy=timers.target
 437 EOF
 438
 439 i /etc/systemd/system/mailclean.service <<EOF
 440 [Unit]
 441 Description=Delete and archive old mail files
 442 After=multi-user.target
 443
 444 [Service]
 445 User=$u
 446 Type=oneshot
 447 ExecStart=/usr/local/bin/sysd-mail-once mailclean /a/bin/distro-setup/mailclean
 448 EOF
 449
 450 # * postgrey
 451
 452
 453 i /etc/default/postgrey <<'EOF'
 454 POSTGREY_OPTS="--exim --unix=/var/run/postgrey/postgrey.sock --retry-window=4 --max-age=60"
 455 EOF
 456
 457 # * clamav
 458
 459 m usermod -a -G Debian-exim clamav
 460
 461 i /etc/systemd/system/clamav-daemon.service.d/fix.conf <<EOF
 462 [Service]
 463 ExecStartPre=-/bin/mkdir /var/run/clamav
 464 ExecStartPre=/bin/chown clamav /var/run/clamav
 465 EOF
 466
 467 # * mail vpn config
 468
 469 # old.
 470 #vpnser=mailvpn.service
 471 # todo: this hangs if it cant resolv the endpoint. we
 472 # want it to just retry in the background.
 473 vpnser=wg-quick@wgmail.service
 474
 475 case $HOSTNAME in
 476   $MAIL_HOST)
 477     rsync -aiSAX --chown=root:root --chmod=g-s /p/c/filesystem/etc/wireguard/ /etc/wireguard
 478     bindpaths="/etc/127.0.0.1-resolv:/run/systemd/resolve /etc/basic-nsswitch:/etc/resolved-nsswitch:norbind"
 479     ;;&
 480   bk)
 481     bindpaths="/etc/10.173.8.1-resolv:/etc/127.0.0.1-resolv"
 482     ;;&
 483   *)
 484     d=/p/c/machine_specific/$HOSTNAME/filesystem/etc/wireguard/
 485     if [[ -d $d ]]; then
 486       rsync -aiSAX --chown=root:root --chmod=g-s $d  /etc/wireguard
 487     fi
 488     ;;
 489 esac
 490
 491 case $HOSTNAME in
 492   li) : ;;
 493   *)
 494     i /etc/systemd/system/wg-quick@wgmail.service.d/override.conf <<EOF
 495 [Unit]
 496 Requires=mailnn.service
 497 JoinsNamespaceOf=mailnn.service
 498 BindsTo=mailnn.service
 499 StartLimitIntervalSec=0
 500
 501 [Service]
 502 PrivateNetwork=true
 503 # i dont think we need any of these, but it doesnt hurt to stay consistent
 504 BindPaths=$bindpaths
 505
 506 Restart=on-failure
 507 RestartSec=20
 508 EOF
 509     ;;
 510 esac
 511
 512
 513 # https://selivan.github.io/2017/12/30/systemd-serice-always-restart.html
 514 i /etc/systemd/system/mailvpn.service <<EOF
 515 [Unit]
 516 Description=OpenVPN tunnel for mail
 517 After=syslog.target network-online.target mailnn.service
 518 Wants=network-online.target
 519 Documentation=man:openvpn(8)
 520 Documentation=https://community.openvpn.net/openvpn/wiki/Openvpn24ManPage
 521 Documentation=https://community.openvpn.net/openvpn/wiki/HOWTO
 522 # needed to continually restatr
 523 JoinsNamespaceOf=mailnn.service
 524 BindsTo=mailnn.service
 525 StartLimitIntervalSec=0
 526
 527 [Service]
 528 Type=notify
 529 RuntimeDirectory=openvpn-client
 530 RuntimeDirectoryMode=0710
 531 WorkingDirectory=/etc/openvpn/client
 532 ExecStart=/usr/sbin/openvpn --suppress-timestamps --nobind --config /etc/openvpn/client/mail.conf
 533 #CapabilityBoundingSet=CAP_IPC_LOCK CAP_NET_ADMIN CAP_NET_RAW CAP_SETGID CAP_SETUID CAP_SYS_CHROOT CAP_DAC_OVERRIDE
 534 LimitNPROC=10
 535 # DeviceAllow=/dev/null rw
 536 # DeviceAllow=/dev/net/tun rw
 537 PrivateNetwork=true
 538 # in the network namespace, we cant connect to systemd-resolved on 127.0.0.53,
 539 # because of
 540 # https://unix.stackexchange.com/questions/445782/how-to-allow-systemd-resolved-to-listen-to-an-interface-other-than-loopback
 541 # there is a workaround there, but i dont think its really worth it,
 542 # the mail server is fine with a static dns anyways.
 543 # This thread is also interesting,
 544 # https://github.com/slingamn/namespaced-openvpn/issues/7
 545 # todo: the iptables rule at the bottom could be useful to prevent
 546 # dns from leaking in my network namespaced vpn.
 547 # I also like the idea of patching systemd-resolved so it
 548 # will listen on other interfaces, but its not worth my time.
 549 BindPaths=$bindpaths
 550 Restart=always
 551 # time to sleep before restarting a service
 552 RestartSec=20
 553
 554 [Install]
 555 WantedBy=multi-user.target
 556 EOF
 557
 558 i /etc/systemd/system/mailnnroute.service <<'EOF'
 559 [Unit]
 560 Description=Network routing for mailnn
 561 After=syslog.target network-online.target mailnn.service
 562 Wants=network-online.target
 563 JoinsNamespaceOf=mailnn.service
 564 BindsTo=mailnn.service
 565 StartLimitIntervalSec=0
 566
 567 [Service]
 568 Type=simple
 569 RemainAfterExit=true
 570 PrivateNetwork=true
 571 ExecStart=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns -n 10.173.8 start mail
 572 ExecStop=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns stop mail
 573 Restart=always
 574 RestartSec=20
 575
 576
 577 [Install]
 578 WantedBy=multi-user.target
 579 EOF
 580
 581 #
 582 i /etc/systemd/system/mailnn.service <<'EOF'
 583 [Unit]
 584 Description=Network Namespace for mail vpn service that will live forever and cant fail
 585 After=syslog.target network-online.target
 586 Wants=network-online.target
 587
 588 [Service]
 589 Type=simple
 590 PrivateNetwork=true
 591 ExecStart=/bin/sleep infinity
 592
 593 [Install]
 594 WantedBy=multi-user.target
 595 EOF
 596
 597 i /etc/systemd/system/mailbindwatchdog.service <<EOF
 598 [Unit]
 599 Description=Watchdog to restart services relying on systemd-resolved dir
 600 After=syslog.target network-online.target
 601 Wants=network-online.target
 602 BindsTo=mailnn.service
 603
 604 [Service]
 605 Type=simple
 606 ExecStart=/usr/local/bin/mailbindwatchdog $vpnser ${nn_progs[@]} unbound.service radicale.service
 607 Restart=always
 608 # time to sleep before restarting a service
 609 RestartSec=10
 610
 611 [Install]
 612 WantedBy=multi-user.target
 613 EOF
 614
 615
 616
 617 # old service name
 618 rm -fv /etc/systemd/system/openvpn-client-mail@.service
 619
 620 # We use a local unbound because systemd-resolved wont accept our
 621 # request, it will only listen to 127.0.0.53 in the main network
 622 # namespace, and rejected feature requests to change that (although I
 623 # could change the code and recompile), but anyways, that could answer
 624 # with things specific to the lan that aren't applicable in this
 625 # namespace, and since unbound is a recursive resolver, it means we just
 626 # use our own ip against dnsbl rate limits.
 627 #
 628 # If we ever notice this change, chattr +i on it
 629 # trust-ad is used in t10+, glibc 2.31
 630
 631 i /etc/127.0.0.1-resolv/stub-resolv.conf <<'EOF'
 632 nameserver 127.0.0.1
 633 options edns0 trust-ad
 634 EOF
 635
 636 i /etc/127.0.0.53-resolv/stub-resolv.conf <<'EOF'
 637 nameserver 127.0.0.53
 638 options edns0 trust-ad
 639 EOF
 640
 641
 642 i /etc/10.173.8.1-resolv/stub-resolv.conf <<'EOF'
 643 nameserver 10.173.8.1
 644 options edns0 trust-ad
 645 EOF
 646
 647 # this is just a bug fix for trisquel.
 648 f=/etc/apparmor.d/usr.sbin.unbound
 649 line="/usr/sbin/unbound flags=(attach_disconnected) {"
 650 if ! grep -qFx "$line" $f; then
 651   badline="/usr/sbin/unbound {"
 652   if ! grep -qFx "$badline" $f; then
 653     err expected line in $f not found
 654   fi
 655   sed -i "s,^$badline$,$line," $f
 656   if systemctl is-active apparmor &>/dev/null; then
 657     m systemctl reload apparmor
 658   fi
 659 fi
 660
 661 # note: anything added to nn_progs needs corresponding rm
 662 # down below in the host switch
 663 nn_progs=(exim4)
 664 if mailhost; then
 665   # Note dovecots lmtp doesnt need to be in the same nn to accept delivery.
 666   # Its in the nn so remote clients can connect to it.
 667   nn_progs+=(spamassassin dovecot)
 668 fi
 669
 670 case $HOSTNAME in
 671   $MAIL_HOST)
 672     # todo, should this be after vpn service
 673     i /etc/systemd/system/unbound.service.d/nn.conf <<EOF
 674 [Unit]
 675 After=mailnn.service
 676 JoinsNamespaceOf=mailnn.service
 677 BindsTo=mailnn.service
 678 StartLimitIntervalSec=0
 679
 680 [Service]
 681 PrivateNetwork=true
 682 # note the nsswitch bind is actually not needed for bk, but
 683 # its the same file so it does no harm.
 684 BindPaths=$bindpaths
 685
 686 Restart=always
 687 RestartSec=20
 688 EOF
 689
 690     # sooo, there are a few ways to get traffic from the mail network
 691     # namespace to go over the wghole.
 692     #
 693     #1: unify the mail vpn and wghole
 694     # into 1 network.  this seems simple and logical, so I'm doing it.
 695     # One general downside is tying things together, if I need to mess
 696     # with one thing, it breaks the other. Oh well for now.
 697     #
 698     # 2. We can route 10.5.3.0/24 out of the mail nn and nat it into wghole.
 699     #
 700     # 3. We can setup the routing to happen on li, which seemed like I
 701     # just needed to add 10.8.0.4/24 to AllowedIPs in at least the
 702     # wghole clients, but I think that is kind of hacky and breaks ipv4
 703     # routing within the mailvpn, it happened to work just because exim
 704     # prefers ipv6 and that was also available in the mailvpn.
 705     #
 706     # 4. Put the hole interface into the mail network namespace. This
 707     # doesn't work if the mail vpn is wg.  For openvpn, it bypasses the
 708     # vpn routing and establishes a direct connection.  I only use the
 709     # hole vpn for randomish things, it should be fine to join the mail
 710     # nn for that. There should be some way to fix the routing issue
 711     # by doing manual routing, but that doesn't seem like a good use of time.
 712     # relevant:
 713     # https://www.wireguard.com/netns/#
 714     #
 715     # for wireguard debugging
 716     # echo module wireguard +p > /sys/kernel/debug/dynamic_debug/control
 717     # dmesg -w
 718
 719     ;;&
 720   $MAIL_HOST|bk)
 721     for unit in ${nn_progs[@]}; do
 722       i /etc/systemd/system/$unit.service.d/nn.conf <<EOF
 723 [Unit]
 724
 725 # Wants appears better than requires because with requires,
 726 # if the vpnser fails to start, this service won't get run at
 727 # all, even if the vpnser starts on an automatic restart.
 728
 729 Wants=$vpnser
 730 After=network.target mailnn.service $vpnser
 731 JoinsNamespaceOf=mailnn.service
 732 BindsTo=mailnn.service
 733 StartLimitIntervalSec=0
 734
 735 [Service]
 736 PrivateNetwork=true
 737 # note the nsswitch bind is actually not needed for bk, but
 738 # its the same file so it does no harm.
 739 BindPaths=$bindpaths
 740
 741 Restart=always
 742 RestartSec=20
 743 EOF
 744     done
 745     ;;
 746   *)
 747     for unit in exim4 spamassassin dovecot unbound; do
 748       f=/etc/systemd/system/$unit.service.d/nn.conf
 749       if [[ -s $f ]]; then
 750         rm -fv $f
 751         reload=true
 752       fi
 753     done
 754     ;;
 755 esac
 756
 757 # * spamassassin config
 758 i /etc/sysctl.d/80-iank-mail.conf <<'EOF'
 759 # see exim spec
 760 net.netfilter.nf_conntrack_tcp_timeout_close_wait = 120
 761 EOF
 762 if $ir; then
 763   m sysctl -p
 764 fi
 765
 766 i /etc/spamassassin/mylocal.cf <<'EOF'
 767 # this is mylocal.cf because the normal local.cf has a bunch of upstream stuff i dont want to mess with
 768
 769 # /usr/share/doc/exim4-base/README.Debian.gz:
 770 #   SpamAssassin's default report should not be used in a add_header
 771 #   statement since it contains empty lines. (This triggers e.g. Amavis'
 772 #   warning "BAD HEADER SECTION, Improper folded header field made up
 773 #   entirely of whitespace".) This is a safe, terse alternative:
 774 clear_report_template
 775 report (_SCORE_ / _REQD_ requ) _TESTSSCORES(,)_ autolearn=_AUTOLEARN
 776 uridnsbl_skip_domain iankelling.org
 777 uridnsbl_skip_domain amnimal.ninja
 778 uridnsbl_skip_domain expertpathologyreview.com
 779 uridnsbl_skip_domain zroe.org
 780 EOF
 781
 782 # 2020-10-19 remove old file. remove this when all hosts updated
 783 rm -fv /etc/systemd/system/spamddnsfix.{timer,service}
 784
 785 i /etc/default/spamassassin <<'EOF'
 786 # defaults plus debugging flags for an issue im having
 787 OPTIONS="--create-prefs --max-children 5 --helper-home-dir"
 788 PIDFILE="/var/run/spamd.pid"
 789 # my additions
 790 NICE="--nicelevel 15"
 791 CRON=1
 792 EOF
 793 #####   end spamassassin config
 794
 795
 796 # * Update mail cert
 797 if [[ -e /p/c/filesystem ]]; then
 798   # note, man openvpn implies we could just call mail-route on vpn startup/shutdown with
 799   # systemd, buuut it can remake the tun device unexpectedly, i got this in the log
 800   # after my internet was down for a bit:
 801   # NOTE: Pulled options changed on restart, will need to close and reopen TUN/TAP device.
 802   m /a/exe/vpn-mk-client-cert -b mailclient -n mail li.iankelling.org
 803 fi
 804
 805 # With openvpn, I didn't get around to persisting the openvpn
 806 # cert/configs into /p/c/machine_specific/bk, so I had this case to
 807 # manually get the cert. However, we aren't using openvpn anymore, so it
 808 # is commented out.
 809 #
 810 # case $HOSTNAME in
 811 #   bk)
 812 #     if [[ ! -e /etc/openvpn/client/mail.conf ]]; then
 813 #       echo "$0: error: first, on a system with /p/c/filesystem, run mail-setup, or the vpn-mk-client-cert line above this err" 2>&2
 814 #       exit 1
 815 #     fi
 816 #     ;;
 817 # esac
 818
 819 m rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/mail-cert-cron /usr/local/bin
 820
 821 i /etc/systemd/system/mailcert.service <<'EOF'
 822 [Unit]
 823 Description=Mail cert rsync
 824 After=multi-user.target
 825
 826 [Service]
 827 Type=oneshot
 828 ExecStart=/usr/local/bin/sysd-mail-once mailcert /usr/local/bin/mail-cert-cron
 829 EOF
 830 i /etc/systemd/system/mailcert.timer <<'EOF'
 831 [Unit]
 832 Description=Run mail-cert once a day
 833
 834 [Timer]
 835 OnCalendar=daily
 836
 837 [Install]
 838 WantedBy=timers.target
 839 EOF
 840
 841
 842 wghost=${HOSTNAME}wg.b8.nz
 843 if $bhost_t && [[ ! -e /etc/exim4/certs/$wghost/privkey.pem ]]; then
 844   certbot -n --manual-public-ip-logging-ok --eff-email --agree-tos -m letsencrypt@iankelling.org \
 845           certonly --manual --preferred-challenges=dns \
 846           --manual-auth-hook /a/bin/ds/le-dns-challenge \
 847           --manual-cleanup-hook /a/bin/ds/le-dns-challenge-cleanup \
 848           --deploy-hook /a/bin/ds/le-exim-deploy -d $wghost
 849 fi
 850
 851 # * fail2ban
 852
 853 # todo: test that these configs actually work, eg run
 854 # s iptables-exim -S
 855 # and see someone is banned.
 856
 857 sed 's/^ *before *= *iptables-common.conf/before = iptables-common-exim.conf/' \
 858     /etc/fail2ban/action.d/iptables-multiport.conf| i /etc/fail2ban/action.d/iptables-exim.conf
 859 i /etc/fail2ban/action.d/iptables-common-exim.conf <<'EOF'
 860 # iank: same as iptables-common, except iptables is iptables-exim, ip6tables is ip6tables-exim
 861
 862 # Fail2Ban configuration file
 863 #
 864 # Author: Daniel Black
 865 #
 866 # This is a included configuration file and includes the definitions for the iptables
 867 # used in all iptables based actions by default.
 868 #
 869 # The user can override the defaults in iptables-common.local
 870 #
 871 # Modified: Alexander Koeppe <format_c@online.de>, Serg G. Brester <serg.brester@sebres.de>
 872 #       made config file IPv6 capable (see new section Init?family=inet6)
 873
 874 [INCLUDES]
 875
 876 after = iptables-blocktype.local
 877         iptables-common.local
 878 # iptables-blocktype.local is obsolete
 879
 880 [Definition]
 881
 882 # Option:  actionflush
 883 # Notes.:  command executed once to flush IPS, by shutdown (resp. by stop of the jail or this action)
 884 # Values:  CMD
 885 #
 886 actionflush = <iptables> -F f2b-<name>
 887
 888
 889 [Init]
 890
 891 # Option:  chain
 892 # Notes    specifies the iptables chain to which the Fail2Ban rules should be
 893 #          added
 894 # Values:  STRING  Default: INPUT
 895 chain = INPUT
 896
 897 # Default name of the chain
 898 #
 899 name = default
 900
 901 # Option:  port
 902 # Notes.:  specifies port to monitor
 903 # Values:  [ NUM | STRING ]  Default:
 904 #
 905 port = ssh
 906
 907 # Option:  protocol
 908 # Notes.:  internally used by config reader for interpolations.
 909 # Values:  [ tcp | udp | icmp | all ] Default: tcp
 910 #
 911 protocol = tcp
 912
 913 # Option:  blocktype
 914 # Note:    This is what the action does with rules. This can be any jump target
 915 #          as per the iptables man page (section 8). Common values are DROP
 916 #          REJECT, REJECT --reject-with icmp-port-unreachable
 917 # Values:  STRING
 918 blocktype = REJECT --reject-with icmp-port-unreachable
 919
 920 # Option:  returntype
 921 # Note:    This is the default rule on "actionstart". This should be RETURN
 922 #          in all (blocking) actions, except REJECT in allowing actions.
 923 # Values:  STRING
 924 returntype = RETURN
 925
 926 # Option:  lockingopt
 927 # Notes.:  Option was introduced to iptables to prevent multiple instances from
 928 #          running concurrently and causing irratic behavior.  -w was introduced
 929 #          in iptables 1.4.20, so might be absent on older systems
 930 #          See https://github.com/fail2ban/fail2ban/issues/1122
 931 # Values:  STRING
 932 lockingopt = -w
 933
 934 # Option:  iptables
 935 # Notes.:  Actual command to be executed, including common to all calls options
 936 # Values:  STRING
 937 iptables = /usr/local/bin/iptables-exim <lockingopt>
 938
 939
 940 [Init?family=inet6]
 941
 942 # Option:  blocktype (ipv6)
 943 # Note:    This is what the action does with rules. This can be any jump target
 944 #          as per the iptables man page (section 8). Common values are DROP
 945 #          REJECT, REJECT --reject-with icmp6-port-unreachable
 946 # Values:  STRING
 947 blocktype = REJECT --reject-with icmp6-port-unreachable
 948
 949 # Option:  iptables (ipv6)
 950 # Notes.:  Actual command to be executed, including common to all calls options
 951 # Values:  STRING
 952 iptables = /usr/local/bin/ip6tables-exim <lockingopt>
 953 EOF
 954
 955 i /etc/fail2ban/jail.d/exim.local <<'EOF'
 956 [exim]
 957 enabled  = true
 958 port     = 25,587
 959 filter   = exim
 960 banaction = iptables-exim
 961
 962 # 209.51.188.13 = mail.fsf.org
 963 # 2001:470:142::13 = mail.fsf.org
 964 # 209.51.188.92 = eggs.gnu.org
 965 # 2001:470:142:3::10 = eggs.gnu.org
 966 # 72.14.176.105 2600:3c00:e000:280::2 = mail.iankelling.org
 967 # 10.173.8.1 = non-nn net
 968 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
 969 EOF
 970 if $ir; then
 971   m systemctl restart fail2ban
 972 fi
 973
 974 # * common exim4 config
 975
 976
 977 ## old, not using forward files anymore
 978 rm -fv $uhome/.forward /root/.forward
 979
 980
 981 # Make all system users be aliases. preventative
 982 # prevents things like cron mail for user without alias
 983 awk 'BEGIN { FS = ":" } ; $6 !~ /^\/home/ || $7 ~ /\/nologin$/  { print $1 }' /etc/passwd| while read -r user; do
 984   if [[ ! $user ]]; then
 985     continue
 986   fi
 987   if ! grep -q "^$user:" /etc/aliases; then
 988     echo "$user: root" |m tee -a /etc/aliases
 989   fi
 990 done
 991
 992
 993 awk 'BEGIN { FS = ":" } ; $6 ~ /^\/home/ && $7 !~ /\/nologin$/ { print $1 }' /etc/passwd| while read -r user; do
 994   case $HOSTNAME in
 995     $MAIL_HOST)
 996       sed -i "/^user:/d" /etc/aliases
 997       ;;
 998     *)
 999       if ! grep -q "^$user:" /etc/aliases; then
1000         echo "$user: root" |m tee -a /etc/aliases
1001       fi
1002       ;;
1003   esac
1004 done
1005
1006
1007 . /a/bin/bash_unpublished/priv-mail-setup
1008
1009
1010 m gpasswd -a iank adm #needed for reading logs
1011
1012 ### make local bounces go to normal maildir
1013 # local mail that bounces goes to /Maildir or /root/Maildir
1014 dirs=(/m/md/bounces/{cur,tmp,new})
1015 m mkdir -p ${dirs[@]}
1016 m chown iank:iank /m /m/md
1017 m ln -sfT /m/md /m/iank
1018 m chmod 771 /m /m/md
1019 m chown -R $u:Debian-exim /m/md/bounces
1020 m chmod 775 ${dirs[@]}
1021 m usermod -a -G Debian-exim $u
1022 for d in /Maildir /root/Maildir; do
1023   if [[ ! -L $d ]]; then
1024     m rm -rf $d
1025   fi
1026   m ln -sf -T /m/md/bounces $d
1027 done
1028
1029 # dkim, client passwd file
1030 files=(/p/c/machine_specific/$HOSTNAME/filesystem/etc/exim4/*)
1031 f=/p/c/filesystem/etc/exim4/passwd.client
1032 if [[ -e $f ]]; then
1033   files+=($f)
1034 fi
1035 if (( ${#files[@]} )); then
1036   m rsync -ahhi --chown=root:Debian-exim --chmod=0640 \
1037     ${files[@]} /etc/exim4
1038 fi
1039
1040 # By default, only 10 days of logs are kept. increase that.
1041 # And dont compress, I look back at logs too often and
1042 # dont need the annoyance of decompressing them all the time.
1043 m sed -ri '/^\s*compress\s*$/d;s/^(\s*rotate\s).*/\11000/' /etc/logrotate.d/exim4-base
1044 files=(/var/log/exim4/*.gz)
1045 if (( ${#files[@]} )); then
1046   gunzip ${files[@]}
1047 fi
1048
1049 ## disabled. not using .forward files, but this is still interesting
1050 ## for reference.
1051 # ## https://blog.dhampir.no/content/make-exim4-on-debian-respect-forward-and-etcaliases-when-using-a-smarthost
1052 # # i only need .forwards, so just doing that one.
1053 # cd /etc/exim4/conf.d/router
1054 # b=userforward_higher_priority
1055 # # replace the router name so it is unique
1056 # sed -r s/^\\S+:/$b:/ 600_exim4-config_userforward >175_$b
1057 rm -fv /etc/exim4/conf.d/router/175_userforward_higher_priority
1058
1059 # todo, consider 'separate' in etc/exim4.conf, could it help on busy systems?
1060
1061 # alerts is basically the postmaster address
1062 m sed -i --follow-symlinks -f - /etc/aliases <<EOF
1063 \$a root: alerts@iankelling.org
1064 /^root:/d
1065 EOF
1066
1067 cat >/etc/exim4/conf.d/rewrite/34_iank_rewriting <<'EOF'
1068 ncsoft@zroe.org graceq2323@gmail.com hE
1069 EOF
1070
1071 # old name
1072 rm -fv /etc/exim4/conf.d/retry/37_retry
1073
1074 cat >/etc/exim4/conf.d/retry/17_retry <<'EOF'
1075 # Retry fast for my own domains
1076 iankelling.org * F,1d,4m;F,14d,1h
1077 amnimal.ninja * F,1d,4m;F,14d,1h
1078 expertpathologyreview.com * F,1d,4m;F,14d,1h
1079 je.b8.nz * F,1d,4m;F,14d,1h
1080 zroe.org * F,1d,4m;F,14d,1h
1081 eximbackup.b8.nz * F,1d,4m;F,14d,1h
1082
1083 # The spec says the target domain will be used for temporary host errors,
1084 # but i've found that isn't correct, the hostname is required
1085 # at least sometimes.
1086 nn.b8.nz * F,1d,4m;F,14d,1h
1087 defaultnn.b8.nz * F,1d,4m;F,14d,1h
1088 mx.iankelling.org * F,1d,4m;F,14d,1h
1089 bk.b8.nz * F,1d,4m;F,14d,1h
1090 eggs.gnu.org * F,1d,4m;F,14d,1h
1091 fencepost.gnu.org * F,1d,4m;F,14d,1h
1092
1093 # afaik our retry doesnt need this, but just using everything
1094 mx.amnimal.ninja * F,1d,4m;F,14d,1h
1095 mx.expertpathologyreview.com * F,1d,4m;F,14d,1h
1096
1097
1098 mail.fsf.org * F,1d,15m;F,14d,1h
1099 EOF
1100
1101
1102 rm -vf /etc/exim4/conf.d/main/000_localmacros # old filename
1103
1104 # separate file so without quoted EOF for convenience
1105 cat >/etc/exim4/conf.d/main/000_local2 <<EOF
1106 # normally empty, I set this so I can set the envelope address
1107 # when doing mail redelivery to invoke filters. Also allows
1108 # me exiqgrep and stuff.
1109 MAIN_TRUSTED_GROUPS = $u
1110 EOF
1111
1112 cat >/etc/exim4/conf.d/main/000_local <<'EOF'
1113 MAIN_TLS_ENABLE = true
1114
1115 # require tls connections for all smarthosts
1116 REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS = *
1117
1118 # debian exim config added this in 2016 or so?
1119 # it's part of the smtp spec, to limit lines to 998 chars
1120 # but a fair amount of legit mail does not adhere to it. I don't think
1121 # this should be default, like it says in
1122 # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=828801
1123 # todo: the bug for introducing this was about headers, but
1124 # the fix maybe is for all lines? one says gmail rejects, the
1125 # other says gmail does not reject. figure out and open a new bug.
1126 IGNORE_SMTP_LINE_LENGTH_LIMIT = true
1127
1128 # more verbose logs
1129 MAIN_LOG_SELECTOR = +all
1130
1131 # Based on spec, seems like a good idea to be nice.
1132 smtp_return_error_details = true
1133
1134 # default is 10. when exim has been down for a bit, fsf mailserver
1135 # will do a big send in one connection, then exim decides to put
1136 # the messages in the queue instead of delivering them, to avoid
1137 # spawning too many delivery processes. This is the same as the
1138 # fsfs value. And the corresponding one for how many messages
1139 # to send out in 1 connection remote_max_parallel = 256
1140 smtp_accept_queue_per_connection = 500
1141
1142
1143 DKIM_CANON = relaxed
1144 DKIM_SELECTOR = li
1145
1146 # from comments in
1147 # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
1148 # and its best for this to align https://tools.ietf.org/html/rfc7489#page-8
1149 # There could be some circumstance when the
1150 # from: isnt our domain, but the envelope sender is
1151 # and so still want to sign, but I cant think of any case.
1152 DKIM_DOMAIN = ${lc:${domain:$rh_from:}}
1153 # The file is based on the outgoing domain-name in the from-header.
1154 # sign if key exists
1155 DKIM_PRIVATE_KEY = ${if exists{/etc/exim4/${dkim_domain}-private.pem} {/etc/exim4/${dkim_domain}-private.pem}}
1156
1157 # most of the ones that gmail seems to use.
1158 # Exim has horrible default of signing unincluded
1159 # list- headers since they got mentioned in an
1160 # rfc, but this messes up mailing lists, like gnu/debian which want to
1161 # keep your dkim signature intact but add list- headers.
1162 DKIM_SIGN_HEADERS = mime-version:in-reply-to:references:from:date:subject:to
1163
1164 domainlist local_hostnames = ! je.b8.nz : ! bk.b8.nz : *.b8.nz : b8.nz
1165
1166 hostlist iank_trusted = <; \
1167 # veth0
1168 10.173.8.1 ; \
1169 # li li_ip6
1170 72.14.176.105 ; 2600:3c00::f03c:91ff:fe6d:baf8 ; \
1171 # li_vpn_net li_vpn_net_ip6s
1172 10.8.0.0/24; 2600:3c00:e000:280::/64 ; 2600:3c00:e002:3800::/56 ;  \
1173 # bk bk_ip6
1174 85.119.83.50 ; 2001:ba8:1f1:f0c9::2 ; \
1175 # je je_ipv6
1176 85.119.82.128 ; 2001:ba8:1f1:f09d::2 ; \
1177 # fsf_mit_net fsf_mit_net_ip6 fsf_net fsf_net_ip6 fsf_office_net
1178 18.4.89.0/24 ; 2603:3005:71a:2e00::/64 ; 209.51.188.0/24 ; 2001:470:142::/48 ; 74.94.156.208/28
1179
1180
1181 # this is the default delay_warning_condition, plus matching on local_domains.
1182 # If I have some problem with my local system that causes delayed delivery,
1183 # I dont want to send warnings out to non-local domains.
1184 delay_warning_condition = ${if or {\
1185   { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} }\
1186   { match{$h_precedence:}{(?i)bulk|list|junk} }\
1187   { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} }\
1188   { match_domain{$domain}{+local_domains} }\
1189   } {no}{yes}}
1190
1191
1192 # enable 587 in addition to the default 25, so that
1193 # i can send mail where port 25 is firewalled by isp
1194 daemon_smtp_ports = 25 : 587
1195 # default of 25, can get stuck when catching up on mail
1196 smtp_accept_max = 400
1197 smtp_accept_reserve = 100
1198 smtp_reserve_hosts = +iank_trusted
1199
1200 # Rules that make receiving more liberal should be on backup hosts
1201 # so that we dont reject mail accepted by MAIL_HOST
1202 LOCAL_DENY_EXCEPTIONS_LOCAL_ACL_FILE = /etc/exim4/conf.d/local_deny_exceptions_acl
1203 EOF
1204
1205 rm -fv /etc/exim4/rcpt_local_acl # old path
1206
1207 i /etc/exim4/conf.d/local_deny_exceptions_acl <<'EOF'
1208 # This acl already exists in rcpt, this just makes it more widespread.
1209 # See the comment there for its rationale. The reason it needs to be
1210 # more widespread is that I've turned on sender verification, but cron
1211 # emails can fail sender verification since I may be in a network that
1212 # doesn't have my local dns.
1213 accept
1214   authenticated = *
1215
1216 # i setup a local programs smtp to mail.iankelling.org, this
1217 # skips sender verification for it.
1218 accept
1219   hosts = 10.173.8.1
1220 EOF
1221
1222 rm -fv /etc/exim4/data_local_acl # old path
1223
1224 i /etc/exim4/conf.d/data_local_acl <<'EOF'
1225 # Except for the "condition =", this was
1226 # a comment in the check_data acl. The comment about this not
1227 # being suitable has been changed in newer exim versions. The only thing
1228 # related I found was to
1229 # add the condition =, cuz spamassassin has problems with big
1230 # messages and spammers don't bother with big messages,
1231 # but I've increased the size from 10k
1232 # suggested in official docs, and 100k in the wiki example because
1233 # those docs are rather old and I see a 110k spam message
1234 # pretty quickly looking through my spam folder.
1235
1236 warn
1237   !hosts = +iank_trusted
1238   remove_header = X-Spam_score: X-Spam_score_int : X-Spam_bar : X-Spam_report
1239
1240 warn
1241   !hosts = +iank_trusted
1242   # Smarthosts connect with residential ips and thus get flagged as spam if we do a spam check.
1243   !authenticated = plain_server:login_server
1244   condition = ${if < {$message_size}{5000K}}
1245   spam = Debian-exim:true
1246   add_header = X-Spam_score_int: $spam_score_int
1247   add_header = X-Spam_score: $spam_score
1248   add_header = X-Spam_bar: $spam_bar
1249   add_header = X-Spam_report: $spam_report
1250   add_header = X-Spam_action: $spam_action
1251
1252 warn
1253   !hosts = +iank_trusted
1254   !authenticated = plain_server:login_server
1255   condition = ${if def:malware_name}
1256   remove_header = Subject:
1257   add_header = Subject: [Clamav warning: $malware_name] $h_subject
1258   log_message = heuristic malware warning: $malware_name
1259
1260 #accept
1261 #  spf = pass:fail:softfail:none:neutral:permerror:temperror
1262 #  dmarc_status = reject:quarantine
1263 #  add_header = Reply-to: dmarctest@iankelling.org
1264
1265 EOF
1266
1267 i /etc/exim4/conf.d/router/900_exim4-config_local_user <<'EOF'
1268 ### router/900_exim4-config_local_user
1269 #################################
1270
1271 # This router matches local user mailboxes. If the router fails, the error
1272 # message is "Unknown user".
1273 local_user:
1274   debug_print = "R: local_user for $local_part@$domain"
1275   driver = accept
1276   domains = +local_domains
1277 # ian: default file except where mentioned.
1278 # ian: commented this. I get all local parts. for bk, an rcpt
1279 # check handles checking with dovecot, and the only router
1280 # after this is root.
1281 #  local_parts = ! root
1282   transport = LOCAL_DELIVERY
1283   cannot_route_message = Unknown user
1284 # ian: added for + addressing.
1285   local_part_suffix = +*
1286   local_part_suffix_optional
1287 EOF
1288 i /etc/exim4/conf.d/transport/30_exim4-config_dovecot_lmtp <<'EOF'
1289 dovecot_lmtp:
1290   driver = lmtp
1291   socket = /var/run/dovecot/lmtp
1292   #maximum number of deliveries per batch, default 1
1293   batch_max = 200
1294   envelope_to_add
1295 EOF
1296
1297 i /etc/exim4/conf.d/transport/30_remote_smtp_vpn <<'EOF'
1298 # same as debians 30_exim4-config_remote_smtp, but
1299 # with interface added at the end.
1300
1301 remote_smtp_vpn:
1302   debug_print = "T: remote_smtp_vpn for $local_part@$domain"
1303   driver = smtp
1304 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
1305   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
1306 .endif
1307 .ifdef REMOTE_SMTP_HOSTS_AVOID_TLS
1308   hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
1309 .endif
1310 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1311   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1312 .endif
1313 .ifdef REMOTE_SMTP_RETURN_PATH
1314   return_path = REMOTE_SMTP_RETURN_PATH
1315 .endif
1316 .ifdef REMOTE_SMTP_HELO_DATA
1317   helo_data=REMOTE_SMTP_HELO_DATA
1318 .endif
1319 .ifdef DKIM_DOMAIN
1320 dkim_domain = DKIM_DOMAIN
1321 .endif
1322 .ifdef DKIM_SELECTOR
1323 dkim_selector = DKIM_SELECTOR
1324 .endif
1325 .ifdef DKIM_PRIVATE_KEY
1326 dkim_private_key = DKIM_PRIVATE_KEY
1327 .endif
1328 .ifdef DKIM_CANON
1329 dkim_canon = DKIM_CANON
1330 .endif
1331 .ifdef DKIM_STRICT
1332 dkim_strict = DKIM_STRICT
1333 .endif
1334 .ifdef DKIM_SIGN_HEADERS
1335 dkim_sign_headers = DKIM_SIGN_HEADERS
1336 .endif
1337 .ifdef TLS_DH_MIN_BITS
1338 tls_dh_min_bits = TLS_DH_MIN_BITS
1339 .endif
1340 .ifdef REMOTE_SMTP_TLS_CERTIFICATE
1341 tls_certificate = REMOTE_SMTP_TLS_CERTIFICATE
1342 .endif
1343 .ifdef REMOTE_SMTP_PRIVATEKEY
1344 tls_privatekey = REMOTE_SMTP_PRIVATEKEY
1345 .endif
1346 .ifdef REMOTE_SMTP_HOSTS_REQUIRE_TLS
1347   hosts_require_tls = REMOTE_SMTP_HOSTS_REQUIRE_TLS
1348 .endif
1349 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1350   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1351 .endif
1352   interface = <; 10.8.0.4 ; 2600:3c00:e002:3800::4
1353 EOF
1354
1355 i /etc/exim4/conf.d/transport/30_smarthost_dkim <<'EOF'
1356 # ian: this is remote_smtp_smarthost plus the dkim parts from remote_smtp
1357
1358 smarthost_dkim:
1359   debug_print = "T: remote_smtp_smarthost for $local_part@$domain"
1360   driver = smtp
1361   multi_domain
1362 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
1363   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
1364 .endif
1365   hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \
1366         {\
1367         ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\
1368         }\
1369         {} \
1370       }
1371 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1372   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1373 .endif
1374 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1375   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1376 .endif
1377 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1378   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1379 .endif
1380 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1381   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
1382 .endif
1383 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1384   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1385 .endif
1386 .ifdef REMOTE_SMTP_RETURN_PATH
1387   return_path = REMOTE_SMTP_RETURN_PATH
1388 .endif
1389 .ifdef REMOTE_SMTP_HELO_DATA
1390   helo_data=REMOTE_SMTP_HELO_DATA
1391 .endif
1392 .ifdef TLS_DH_MIN_BITS
1393 tls_dh_min_bits = TLS_DH_MIN_BITS
1394 .endif
1395 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1396 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1397 .endif
1398 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1399 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1400 .endif
1401 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1402   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1403 .endif
1404 .ifdef DKIM_DOMAIN
1405 dkim_domain = DKIM_DOMAIN
1406 .endif
1407 .ifdef DKIM_SELECTOR
1408 dkim_selector = DKIM_SELECTOR
1409 .endif
1410 .ifdef DKIM_PRIVATE_KEY
1411 dkim_private_key = DKIM_PRIVATE_KEY
1412 .endif
1413 .ifdef DKIM_CANON
1414 dkim_canon = DKIM_CANON
1415 .endif
1416 .ifdef DKIM_STRICT
1417 dkim_strict = DKIM_STRICT
1418 .endif
1419 .ifdef DKIM_SIGN_HEADERS
1420 dkim_sign_headers = DKIM_SIGN_HEADERS
1421 .endif
1422 EOF
1423
1424
1425 cat >/etc/exim4/update-exim4.conf.conf  <<'EOF'
1426 # default stuff, i havent checked if its needed
1427 dc_minimaldns='false'
1428 dc_relay_nets=''
1429 CFILEMODE='644'
1430 dc_use_split_config='true'
1431 dc_mailname_in_oh='true'
1432 EOF
1433
1434
1435 # * radicale
1436 if mailhost; then
1437   if ! mountpoint /o; then
1438     echo "error /o is not a mountpoint" >&2
1439     exit 1
1440   fi
1441
1442   # davx/davdroid setup instructions at the bottom
1443
1444   # main docs:
1445   # http://radicale.org/user_documentation/
1446   # https://davdroid.bitfire.at/configuration/
1447
1448   # note on debugging: if radicale can't bind to the address,
1449   # in the log it just says "Starting Radicale". If you run
1450   # it in the foreground, it will give more info. Background
1451   # plus debug does not help.
1452   # sudo -u radicale radicale -D -f
1453
1454   # created password file with:
1455   # htpasswd -c /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1456   # chmod 640 /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1457   # # setup chgrp www-data in ./conflink
1458
1459   pi-nostart radicale
1460
1461   i /etc/systemd/system/radicale.service.d/override.conf <<EOF
1462 [Unit]
1463
1464 After=network.target network-online.target mailnn.service $vpnser
1465
1466 Wants=$vpnser
1467 JoinsNamespaceOf=mailnn.service
1468 StartLimitIntervalSec=0
1469
1470 [Service]
1471 PrivateNetwork=true
1472 BindPaths=$bindpaths
1473 Restart=always
1474 # time to sleep before restarting a service
1475 RestartSec=20
1476
1477 [Install]
1478 # for openvpn
1479 RequiredBy=$vpnser
1480 EOF
1481
1482
1483   # use persistent uid/gid
1484   IFS=:; read -r _ _ uid _ < <(getent passwd radicale ); unset IFS
1485   IFS=:; read -r _ _ gid _ < <(getent group radicale ); unset IFS
1486   if [[ $uid != 609 ]]; then
1487     m systemctl stop radicale ||:
1488     m usermod -u 609 radicale
1489     m groupmod -g 609 radicale
1490     m usermod -g 609 radicale
1491   fi
1492   m find /o/radicale  -xdev -exec chown -h 609 {} +
1493   m find /o/radicale -xdev -exec chgrp -h 609 {} +
1494
1495
1496   # I moved /var/lib/radicale after it's initialization.
1497   # I did a sudo -u radicale git init in the collections subfolder
1498   # after it gets created, per the git docs.
1499   m /a/exe/lnf -T /o/radicale /var/lib/radicale
1500
1501   # from https://www.williamjbowman.com/blog/2015/07/24/setting-up-webdav-caldav-and-carddav-servers/
1502
1503   # more config is for li in distro-end
1504
1505   # coment in this file says this is needed for it to run on startup
1506   sed -ri 's/^\s*#+\s*(ENABLE_RADICALE\s*=\s*yes\s*)/\1/' /etc/default/radicale
1507
1508   # comments say default is 0.0.0.0:5232
1509   m setini hosts 10.8.0.4:5232 server
1510   # https://radicale.org/2.1.html
1511   m setini type http_x_remote_user auth
1512
1513
1514   # disable power management feature, set to 240 min sync interval,
1515   # so it shouldn't be bad.
1516
1517   # davdroid from f-druid.
1518   # login with url and user name
1519   # url https://cal.iankelling.org/ian
1520   # username ian
1521   # pass, see password manager for radicale
1522   #
1523   # add account dialog:
1524   #
1525   # set account name as ian@iankelling.org, per help text below the
1526   # field.
1527   #
1528   # switch to groups are per-contact categories,
1529   # per https://davdroid.bitfire.at/configuration/radicale/
1530   #
1531   #
1532   # After setting up account, I added one address book, named
1533   # ianaddr. calender was already created, named ian. checked boxes under
1534   # both. synced.
1535   #
1536   # To restore from old phone to new phone, I wiped all data out, then copied over the newly created files. I think
1537   #
1538   # ignorable background info:
1539   #
1540   # opentasks uses the calendar file.
1541   #
1542   # The address book I created got a uuid as a name for the file. Note
1543   # the .props file says if it's a calendar or addressbook.
1544   #
1545   # When debugging, tailed /var/log/radicale/radicale.log and apache log,
1546   # both show the requests happening. Without creating the address book,
1547   # after creating a contact, a sync would delete it.
1548   #
1549   # Address books correspond to .props files in the radicale dir.
1550   #
1551   #  Some background is here,
1552   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1553   # which shows separate vcard option is from rfc 6350, the other is 2426,
1554   # radicale page says it implements the former not the latter,
1555   # which conflicts with the documentation of which to select, but whatever.
1556   # http://radicale.org/technical_choices/
1557   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1558   #
1559   # Note, url above says only cayanogenmod 13+ and omnirom can manage groups.
1560
1561   # Note, radicale had built-in git support to track changes, but they
1562   # removed it in 2.0.
1563
1564 fi
1565
1566 # * dovecot
1567
1568 # ** $MAIL_HOST|bk|je)
1569 case $HOSTNAME in
1570   $MAIL_HOST|bk|je)
1571     # based on a little google and package search, just the dovecot
1572     # packages we need instead of dovecot-common.
1573     #
1574     # dovecot-lmtpd is for exim to deliver to dovecot instead of maildir
1575     # directly.  The reason to do this is to use dovecot\'s sieve, which
1576     # can generally do more than exims filters (a few things less) and
1577     # sieve has the benefit of being supported in postfix and
1578     # proprietary/weird environments, so there is more examples on the
1579     # internet.
1580     pi-nostart dovecot-core dovecot-imapd dovecot-sieve dovecot-lmtpd dovecot-sqlite sqlite3
1581
1582     for f in /p/c{/machine_specific/$HOSTNAME,}/filesystem/etc/dovecot/users; do
1583       if [[ -e $f ]]; then
1584         m rsync -ahhi --chown=root:dovecot --chmod=0640 $f /etc/dovecot/
1585         break
1586       fi
1587     done
1588     for f in /p/c/subdir_files/sieve/*sieve /a/bin/ds/subdir_files/sieve/*sieve; do
1589       m sudo -u $u /a/exe/lnf -v -T $f $uhome/sieve/${f##*/}
1590     done
1591
1592     # https://wiki.dovecot.org/SSL/DovecotConfiguration
1593     i /etc/dovecot/dhparam <<'EOF'
1594 -----BEGIN DH PARAMETERS-----
1595 MIIBCAKCAQEAoleil6SBxGqQKk7j0y2vV3Oklv6XupZKn7PkPv485QuFeFagifeS
1596 A+Jz6Wquqk5zhGyCu63Hp4wzGs4TyQqoLjkaWL6Ra/Bw3g3ofPEzMGEsV1Qdqde4
1597 jorwiwtr2i9E6TXQp0noT/7VFeHulIkayTeW8JulINdMHs+oLylv16McGCIrxbkM
1598 8D1PuO0TP/CNDs2QbRvJ1RjY3CeGpxMhrSHVgBCUMwnA2cvz3bYjI7UMYMMDPNrE
1599 PLrwsYzXGGCdJsO2vsmmqqgLsZiapYJlUNjfiyWLt7E2H6WzkNB3VIhIPfLqFDPK
1600 xioE3sYKdjOt+p6mlg3l8+OLtODEFPHDqwIBAg==
1601 -----END DH PARAMETERS-----
1602 EOF
1603     {
1604
1605       if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
1606         cat <<'EOF'
1607 ssl_cert = </etc/exim4/fullchain.pem
1608 ssl_key = </etc/exim4/privkey.pem
1609 EOF
1610       else
1611         # We have a lets encrypt hooks that puts things here.
1612         # This is just for bk, which uses the vpn cert in exim
1613         # for sending mail, but the local hostname cert for
1614         # dovecot.
1615         cat <<'EOF'
1616 ssl_cert = </etc/exim4/exim.crt
1617 ssl_key = </etc/exim4/exim.key
1618 EOF
1619       fi
1620
1621       cat <<'EOF'
1622 # https://ssl-config.mozilla.org
1623 ssl = required
1624 # this is the same as the certbot list, i check changes in /a/bin/ds/filesystem/usr/local/bin/check-lets-encrypt-ssl-settings
1625 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
1626 ssl_protocols = TLSv1.2
1627 ssl_prefer_server_ciphers = no
1628
1629 protocol lmtp {
1630 #per https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
1631 # default is just $mail_plugins
1632   mail_plugins = $mail_plugins sieve
1633 }
1634 EOF
1635       if dpkg --compare-versions "$(dpkg-query -f='${Version}\n' --show dovecot-core)" ge 1:2.3; then
1636         cat <<EOF
1637 ssl_dh = </etc/dovecot/dhparam
1638 EOF
1639       fi
1640     } >/etc/dovecot/local.conf
1641
1642     ;;&
1643
1644   # **  $MAIL_HOST)
1645   $MAIL_HOST)
1646     # If we changed 90-sieve.conf and removed the active part of the
1647     # sieve option, we wouldn\'t need this, but I\'d rather not modify a
1648     # default config if not needed. This won\'t work as a symlink in /a/c
1649     # unfortunately.
1650     m sudo -u $u /a/exe/lnf -T sieve/main.sieve $uhome/.dovecot.sieve
1651
1652     if [[ ! -e $uhome/sieve/personal.sieve ]]; then
1653       m touch $uhome/sieve/personal{,end}{,test}.sieve
1654     fi
1655
1656     rm -fv /etc/dovecot/conf.d/20-lmtp.conf # file from prev version
1657     cat >>/etc/dovecot/local.conf <<EOF
1658 # simple password file based login
1659 !include conf.d/auth-passwdfile.conf.ext
1660
1661 # ian: %u is used for alerts user vs iank
1662 mail_location = maildir:/m/%u:LAYOUT=fs:INBOX=/m/%u/INBOX
1663 mail_uid = $u
1664 mail_gid = $u
1665
1666 protocol lmtp {
1667 # For a normal setup with exim, we need something like this, which
1668 # removes the domain part
1669 #  auth_username_format = %Ln
1670 #
1671 #  or else # Exim says something like
1672 #  "LMTP error after RCPT ... 550 ... User doesn't exist someuser@somedomain"
1673 # Dovecot verbose log says something like
1674 # "auth-worker(9048): passwd(someuser@somedomain): unknown user"
1675 # reference: http://wiki.dovecot.org/LMTP/Exim
1676 #
1677 # However, I use this to direct all mail to the same inbox.
1678 # A normal way to do this, which I did at first is to have
1679 # a router in exim almost at the end, eg 950,
1680 #local_catchall:
1681 #  debug_print = "R: catchall for \$local_part@\$domain"
1682 #  driver = redirect
1683 #  domains = +local_domains
1684 #  data = $u
1685 # based on
1686 # http://blog.alteholz.eu/2015/04/exim4-and-catchall-email-address/
1687 # with superflous options removed.
1688 # However, this causes the envelope to be rewritten,
1689 # which makes filtering into mailboxes a little less robust or more complicated,
1690 # so I've done it this way instead. it also requires
1691 # modifying the local router in exim.
1692   auth_username_format = $u
1693 }
1694 EOF
1695     ;;&
1696   # **  bk|je)
1697   bk|je)
1698     chown -R mail.mail /m/md
1699
1700     f=/etc/dovecot/conf.d/10-auth.conf
1701     if [[ -e $f ]]; then
1702       mv $f $f-iank-disabled
1703     fi
1704
1705     cat >>/etc/dovecot/local.conf <<EOF
1706 !include /etc/dovecot/local.conf.ext
1707
1708 # for debugging info, uncomment these.
1709 # logs go to syslog and to /var/log/mail.log
1710 #auth_verbose=yes
1711 #mail_debug=yes
1712
1713
1714 protocol lmtp {
1715 # This downcases the localpart. default is case sensitive.
1716 # case sensitive local part will miss out on valid email when some person or system
1717 # mistakenly capitalizes things.
1718   auth_username_format = %Lu
1719 }
1720
1721 # make 147 only listen on localhost, plan to use for nextcloud.
1722 # copied from mailinabox
1723 service imap-login {
1724   inet_listener imap {
1725     address = 127.0.0.1
1726   }
1727 }
1728 # https://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_dovecot_authenticator.html
1729 service auth {
1730   unix_listener auth-client {
1731     user = Debian-exim
1732     group = Debian-exim
1733   }
1734 }
1735
1736
1737 plugin {
1738   sieve_before = /etc/dovecot/sieve-spam.sieve
1739   # from mailinabox
1740   sieve = /m/sieve/%d/%n.sieve
1741   sieve_dir = /m/sieve/%d/%n
1742 }
1743
1744
1745 # all taken from mailinabox.
1746 mail_location = maildir:/m/md/%d/%n
1747 # meh, ok.
1748 mail_privileged_group = mail
1749 # By default Dovecot allows users to log in only with UID numbers 500 and above. mail is 8
1750 first_valid_uid = 1
1751
1752 # todo: test these changes in the universal config
1753 # mailboxes taken from mailinabox but removed
1754 # settings duplicate to defaults
1755 namespace inbox {
1756   mailbox INBOX {
1757     auto = subscribe
1758   }
1759   mailbox Spam {
1760     special_use = \Junk
1761     auto = subscribe
1762   }
1763   mailbox Drafts {
1764     auto = subscribe
1765   }
1766   mailbox Sent {
1767     auto = subscribe
1768   }
1769   mailbox Trash {
1770     auto = subscribe
1771   }
1772   mailbox Archive {
1773     special_use = \Archive
1774     auto = subscribe
1775   }
1776 }
1777 auth_mechanisms = plain login
1778 EOF
1779
1780     i /etc/dovecot/sieve-spam.sieve <<'EOF'
1781 require ["regex", "fileinto", "imap4flags"];
1782
1783 if allof (header :regex "X-Spam-Status" "^Yes") {
1784   fileinto "Spam";
1785   stop;
1786 }
1787 EOF
1788
1789     i /etc/dovecot/local.conf.ext <<'EOF'
1790 passdb {
1791   driver = sql
1792   args = /etc/dovecot/dovecot-sql.conf.ext
1793 }
1794 userdb {
1795   driver = sql
1796   args = /etc/dovecot/dovecot-sql.conf.ext
1797 }
1798
1799 EOF
1800
1801     i /etc/dovecot/dovecot-sql.conf.ext <<'EOF'
1802 # from mailinabox
1803 driver = sqlite
1804 # for je and bk, populated the testignore users for the relevant domains
1805 connect = /m/rc/users.sqlite
1806 default_pass_scheme = SHA512-CRYPT
1807 password_query = SELECT email as user, password FROM users WHERE email='%u';
1808 user_query = SELECT email AS user, "mail" as uid, "mail" as gid, "/m/md/%d/%n" as home FROM users WHERE email='%u';
1809 iterate_query = SELECT email AS user FROM users;
1810 EOF
1811     m chmod 0600 /etc/dovecot/dovecot-sql.conf.ext # per Dovecot instructions
1812
1813     # db needs to be in a www-data writable directory
1814     db=/m/rc/users.sqlite
1815     if [[ ! -s $db ]]; then
1816       m mkdir -p /m/rc
1817       m sqlite3 $db <<'EOF'
1818 CREATE TABLE users (
1819 id INTEGER PRIMARY KEY AUTOINCREMENT,
1820 email TEXT NOT NULL UNIQUE,
1821 password TEXT NOT NULL,
1822 extra,
1823 privileges TEXT NOT NULL DEFAULT '');
1824 EOF
1825     fi
1826     # users.sqlite is saved into /p/c/machine_specific, so update it there!.
1827     #
1828     # example of adding a user:
1829     # hash: doveadm pw -s SHA512-CRYPT -p passhere
1830     # sqlite3 /m/rc/users.sqlite <<'EOF'
1831     #insert into users (email, password) values ('testignore@bk.b8.nz', 'hash');
1832     #EOF
1833     # update users set password = 'hash' where email = 'testignore@bk.b8.nz';
1834
1835     # this should be at the end since it requires a valid dovecot config
1836     m sievec /etc/dovecot/sieve-spam.sieve
1837     ;;&
1838   # **  bk)
1839   bk)
1840     # roundcube uses this
1841     mkdir -p /m/sieve
1842     chown mail.mail /m/sieve
1843     m pi dovecot-managesieved
1844     ;;
1845 esac
1846
1847 # * thunderbird autoconfig setup
1848
1849 bkdomains=(expertpathologyreview.com amnimal.ninja)
1850 if [[ $HOSTNAME == bk ]]; then
1851   for domain in ${bkdomains[@]}; do
1852     m /a/exe/web-conf apache2 autoconfig.$domain
1853     dir=/var/www/autoconfig.$domain/html/mail
1854     m mkdir -p $dir
1855     # taken from mailinabox
1856     i $dir/config-v1.1.xml <<EOF
1857 <?xml version="1.0" encoding="UTF-8"?>
1858 <clientConfig version="1.1">
1859     <emailProvider id="$domain">
1860       <domain>$domain</domain>
1861
1862       <displayName>$domain Mail</displayName>
1863       <displayShortName>$domain</displayShortName>
1864
1865       <incomingServer type="imap">
1866          <hostname>mail2.iankelling.org</hostname>
1867          <port>993</port>
1868          <socketType>SSL</socketType>
1869          <username>%EMAILADDRESS%</username>
1870          <authentication>password-cleartext</authentication>
1871       </incomingServer>
1872
1873       <outgoingServer type="smtp">
1874          <hostname>mail2.iankelling.org</hostname>
1875          <port>587</port>
1876          <socketType>STARTTLS</socketType>
1877          <username>%EMAILADDRESS%</username>
1878          <authentication>password-cleartext</authentication>
1879          <addThisServer>true</addThisServer>
1880          <useGlobalPreferredServer>false</useGlobalPreferredServer>
1881       </outgoingServer>
1882
1883       <documentation url="https://$domain/">
1884          <descr lang="en">$domain website.</descr>
1885       </documentation>
1886     </emailProvider>
1887
1888     <webMail>
1889       <loginPage url="https://$domain/roundcube" />
1890       <loginPageInfo url="https://$domain/roundcube" >
1891         <username>%EMAILADDRESS%</username>
1892         <usernameField id="rcmloginuser" name="_user" />
1893         <passwordField id="rcmloginpwd" name="_pass" />
1894         <loginButton id="rcmloginsubmit" />
1895       </loginPageInfo>
1896     </webMail>
1897     <clientConfigUpdate url="https://autoconfig.$domain/mail/config-v1.1.xml" />
1898 </clientConfig>
1899 EOF
1900   done
1901 fi
1902
1903 # * roundcube setup
1904
1905 if [[ $HOSTNAME == bk ]]; then
1906
1907   # zip according to /installer
1908   # which requires adding a line to /usr/local/lib/roundcubemail/config/config.inc.php
1909   # $config['enable_installer'] = true;
1910   pi roundcube roundcube-sqlite3 php-zip apache2 php-fpm
1911
1912   ### begin composer install
1913   # https://getcomposer.org/doc/faqs/how-to-install-composer-programmatically.md
1914   # cd $(mktemp -d)
1915   # sum="$(wget -q -O - https://composer.github.io/installer.sig)"
1916   # m php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
1917   # if [[ $sum != $(php -r "echo hash_file('sha384', 'composer-setup.php');") ]]; then
1918   #   echo 'ERROR: Invalid composer installer checksum' >&2
1919   #   rm -fv composer-setup.php
1920   #   exit 1
1921   # fi
1922   # m php composer-setup.php --quiet
1923   # rm -fv composer-setup.php
1924   # m mv composer.phar /usr/local/bin
1925
1926   # the above method gets composer2, carddav plugin at least doesnt work with that
1927   # yet, it was just released 10-24-2020.
1928   m cd /usr/local/bin
1929   m wget -nv -N https://getcomposer.org/composer-1.phar
1930   chmod +x composer-1.phar
1931   ### end composer install
1932
1933   rcdirs=(/usr/local/lib/rcexpertpath /usr/local/lib/rcninja)
1934   ncdirs=(/var/www/ncninja)
1935   ncdirs=(/var/www/ncexpertpath /var/www/ncninja)
1936   # point debian cronjob to our local install, preventing daily cron error
1937
1938   # debian's cronjob will fail, remove both paths it uses just to be sure
1939   rm -fv /usr/share/roundcube/bin/cleandb.sh /etc/cron.d/roundcube-core
1940
1941   #### begin dl roundcube
1942   # note, im r2e subbed to https://github.com/roundcube/roundcubemail/releases.atom
1943   v=1.4.13; f=roundcubemail-$v-complete.tar.gz
1944   cd /root
1945   if [[ -e $f ]]; then
1946     timestamp=$(stat -c %Y $f)
1947   else
1948     timestamp=0
1949   fi
1950   m wget -nv -N https://github.com/roundcube/roundcubemail/releases/download/$v/$f
1951   new_timestamp=$(stat -c %Y $f)
1952   for rcdir in ${rcdirs[@]}; do
1953     if [[ $timestamp != "$new_timestamp" ||  ! -e "$rcdir/config/secret" ]]; then
1954       m tar -C /usr/local/lib --no-same-owner -zxf $f
1955       m rm -rf $rcdir
1956       m mv /usr/local/lib/roundcubemail-$v $rcdir
1957     fi
1958   done
1959   #### end dl roundcube
1960
1961   for ((i=0; i < ${#bkdomains[@]}; i++)); do
1962     domain=${bkdomains[i]}
1963     rcdir=${rcdirs[i]}
1964     rcbase=${rcdir##*/}
1965     ncdir=${ncdirs[i]}
1966
1967     # copied from debians cronjob
1968     i /etc/cron.d/$rcbase <<EOF
1969 #  Roundcube database cleaning: finally removes all records that are
1970 #  marked as deleted.
1971 0   5  *   *   *   www-data $rcdir/bin/cleandb.sh >/dev/null
1972 EOF
1973
1974     m /a/exe/web-conf - apache2 $domain <<EOF
1975 Alias /roundcube $rcdir
1976 ### begin roundcube settings
1977 # taken from /etc/apache2/conf-available/roundcube.conf version 1.4.8+dfsg.1-1~bpo10+1
1978 <Directory $rcdir/>
1979   Options +FollowSymLinks
1980   # This is needed to parse $rcdir/.htaccess.
1981   AllowOverride All
1982   Require all granted
1983 </Directory>
1984 # Protecting basic directories:
1985 <Directory $rcdir/config>
1986   Options -FollowSymLinks
1987   AllowOverride None
1988 </Directory>
1989 ### end roundcube settings
1990
1991
1992 ### begin nextcloud settings
1993 Alias /nextcloud "$ncdir/"
1994 <Directory $ncdir/>
1995   Require all granted
1996   AllowOverride All
1997   Options FollowSymLinks MultiViews
1998
1999   <IfModule mod_dav.c>
2000     Dav off
2001   </IfModule>
2002
2003 </Directory>
2004
2005 # based on install checker, links to
2006 # https://docs.nextcloud.com/server/19/admin_manual/issues/general_troubleshooting.html#service-discovery
2007 # their example was a bit wrong, I figured it out by adding
2008 # LogLevel warn rewrite:trace5
2009 # then watching the apache logs
2010
2011 RewriteEngine on
2012 RewriteRule ^/\.well-known/host-meta /nextcloud/public.php?service=host-meta [QSA,L]
2013 RewriteRule ^/\.well-known/host-meta\.json /nextcloud/public.php?service=host-meta-json [QSA,L]
2014 RewriteRule ^/\.well-known/webfinger /nextcloud/public.php?service=webfinger [QSA,L]
2015 RewriteRule ^/\.well-known/carddav /nextcloud/remote.php/dav/ [R=301,L]
2016 RewriteRule ^/\.well-known/caldav /nextcloud/remote.php/dav/ [R=301,L]
2017 ### end nextcloud settings
2018 EOF
2019     if [[ ! -e $rcdir/config/secret ]]; then
2020       base64 </dev/urandom | head -c24 >$rcdir/config/secret || [[ $? == 141 || ${PIPESTATUS[0]} == 32 ]]
2021     fi
2022     secret=$(cat $rcdir/config/secret)
2023
2024     rclogdir=/var/log/$rcbase
2025     rctmpdir=/var/tmp/$rcbase
2026     rcdb=/m/rc/$rcbase.sqlite
2027     # config from mailinabox
2028     i $rcdir/config/config.inc.php <<EOF
2029 <?php
2030 \$config = array();
2031 # debian creates this for us
2032 \$config['log_dir'] = '$rclogdir/';
2033 # debian also creates a temp dir, but it is under its install dir,
2034 # seems better to have our own.
2035 \$config['temp_dir'] = '$rctmpdir/';
2036 \$config['db_dsnw'] = 'sqlite:///$rcdb?mode=0640';
2037 \$config['default_host'] = 'ssl://localhost';
2038 \$config['default_port'] = 993;
2039 \$config['imap_conn_options'] = array(
2040   'ssl'         => array(
2041      'verify_peer'  => false,
2042      'verify_peer_name'  => false,
2043    ),
2044  );
2045 \$config['imap_timeout'] = 15;
2046 \$config['smtp_server'] = 'tls://127.0.0.1';
2047 \$config['smtp_conn_options'] = array(
2048   'ssl'         => array(
2049      'verify_peer'  => false,
2050      'verify_peer_name'  => false,
2051    ),
2052  );
2053 \$config['product_name'] = 'webmail';
2054 \$config['des_key'] = '$secret';
2055 \$config['plugins'] = array('archive', 'zipdownload', 'password', 'managesieve', 'jqueryui', 'carddav', 'html5_notifier');
2056 \$config['skin'] = 'elastic';
2057 \$config['login_autocomplete'] = 2;
2058 \$config['password_charset'] = 'UTF-8';
2059 \$config['junk_mbox'] = 'Spam';
2060 # disable builtin addressbook
2061 \$config['address_book_type'] = '';
2062 ?>
2063 EOF
2064
2065     m mkdir -p $rclogdir
2066     m chmod 750 $rclogdir
2067     m chown www-data:adm $rclogdir
2068     # note: subscribed to updates:
2069     # r2e add rcmcarddav https://github.com/blind-coder/rcmcarddav/commits/master.atom ian@iankelling.org
2070     # r2e add roundcube https://github.com/roundcube/roundcubemail/releases.atom ian@iankelling.org
2071     m mkdir -p $rctmpdir /m/rc
2072     m chown -R www-data.www-data $rctmpdir /m/rc
2073     m chmod 750 $rctmpdir
2074     # Ensure the log file monitored by fail2ban exists, or else fail2ban can't start.
2075     # todo: check for other mailinabox things
2076     m sudo -u www-data touch $rclogdir/errors.log
2077
2078     #### begin carddav install
2079     # This is the official roundcube carddav repo.
2080     # Install doc suggests downloading with composer, but that
2081     # didnt work, it said some ldap package for roundcube was missing,
2082     # but I dont want to download some extra ldap thing.
2083     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/INSTALL.md
2084     verf=$rcdir/plugins/carddav/myversion
2085     upgrade=false
2086     install=false
2087     v=4.0.0
2088     if [[ -e $verf ]]; then
2089       if [[ $(cat $verf) != "$v" ]]; then
2090         install=true
2091         upgrade=true
2092       fi
2093     else
2094       install=true
2095     fi
2096     if $install; then
2097       m rm -rf $rcdir/plugins/carddav
2098       tmpd=$(mktemp -d)
2099       m wget -nv -O $tmpd/t.tgz https://github.com/blind-coder/rcmcarddav/releases/download/v$v/carddav-v$v.tgz
2100       cd $rcdir/plugins
2101       tar xzf $tmpd/t.tgz
2102       rm -rf $tmpd
2103       m chown -R www-data:www-data $rcdir/plugins/carddav
2104       m cd $rcdir/plugins/carddav
2105       if $upgrade; then
2106         m sudo -u www-data composer-1.phar update --no-dev
2107       else
2108         m sudo -u www-data composer-1.phar install --no-dev
2109       fi
2110       m chown -R root:root $rcdir/plugins/carddav
2111       echo $v >$verf
2112     fi
2113
2114     # So, strangely, this worked in initial testing, but then
2115     # on first run it wouldn't show the existing contacts until
2116     # I went into the carddav settings and did "force immediate sync",
2117     # which seemed to fix things. Note, some of these settings
2118     # get initalized per/addressbook in the db, then need changing
2119     # there or through the settings menu.
2120
2121     # About categories, see https://www.davx5.com/tested-with/nextcloud
2122     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/GROUPS.md
2123     i $rcdir/plugins/carddav/config.inc.php <<EOF;
2124 <?php
2125 \$prefs['_GLOBAL']['hide_preferences'] = false;
2126 \$prefs['davserver'] = array(
2127 # name in the UI is kind of dumb. This is just something short that seems to fit ok.
2128   'name'         =>  'Main',
2129   'username'     =>  '%u', // login username
2130   'password'     =>  '%p', // login password
2131   'url'          =>  'https://$domain/nextcloud/remote.php/dav/addressbooks/users/%u/contacts',
2132   'active'       =>  true,
2133   'readonly'     =>  false,
2134   'refresh_time' => '00:10:00',
2135   'fixed'        =>  array('username','password'),
2136   'use_categories' => false,
2137   'hide'        =>  false,
2138 );
2139 ?>
2140 EOF
2141     #### end carddav install
2142
2143     cd $rcdir/plugins
2144     if [[ ! -d html5_notifier ]]; then
2145       m git clone https://github.com/stremlau/html5_notifier
2146     fi
2147     cd $rcdir/plugins/html5_notifier
2148     m git pull --rebase
2149
2150     # todo: try out roundcube plugins: thunderbird labels
2151
2152     # Password changing plugin settings
2153     cat $rcdir/plugins/password/config.inc.php.dist - >$rcdir/plugins/password/config.inc.php <<'EOF'
2154 # following are from mailinabox
2155 $config['password_minimum_length'] = 8;
2156 $config['password_db_dsn'] = 'sqlite:////m/rc/users.sqlite';
2157 $config['password_query'] = 'UPDATE users SET password=%D WHERE email=%u';
2158 $config['password_dovecotpw'] = '/usr/bin/doveadm pw';
2159 $config['password_dovecotpw_method'] = 'SHA512-CRYPT';
2160 $config['password_dovecotpw_with_method'] = true;
2161 EOF
2162     # so PHP can use doveadm, for the password changing plugin
2163     m usermod -a -G dovecot www-data
2164     m usermod -a -G mail $u
2165
2166     # so php can update passwords
2167     m chown www-data:dovecot /m/rc/users.sqlite
2168     m chmod 664 /m/rc/users.sqlite
2169
2170     # Run Roundcube database migration script (database is created if it does not exist)
2171     m $rcdir/bin/updatedb.sh --dir $rcdir/SQL --package roundcube
2172     m chown www-data:www-data $rcdb
2173     m chmod 664 $rcdb
2174   done # end loop over domains and rcdirs
2175
2176   ### begin php setup for rc ###
2177   # Enable PHP modules.
2178   m phpenmod -v php mcrypt imap
2179   # dpkg says this is required
2180   m a2enmod proxy_fcgi setenvif
2181   fpm=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* (php[^ ]*-fpm)( .*|$)/\1/p') # eg: php7.4-fpm
2182   phpver=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* php([^ ]*)-fpm( .*|$)/\1/p')
2183   m a2enconf $fpm
2184   # 3 useless guides on php fpm fcgi debian 10 later, i figure out from reading
2185   # /etc/apache2/conf-enabled/php7.3-fpm.conf
2186   m a2dismod php$phpver
2187   # according to /install, we should set date.timezone,
2188   # but that is dumb, the system already has the right zone in
2189   # $rclogdir/errors.log
2190   # todo: consider other settings in
2191   # /a/opt/mailinabox/setup/nextcloud.sh
2192   i /etc/php/$phpver/cli/conf.d/30-local.ini <<'EOF'
2193 apc.enable_cli = 1
2194 EOF
2195
2196   i /etc/php/$phpver/fpm/conf.d/30-local.ini <<'EOF'
2197 date.timezone = "America/New_York"
2198 # for nextcloud
2199 upload_max_filesize = 2000M
2200 post_max_size = 2000M
2201 # install checker, nextcloud/settings/admin/overview
2202 memory_limit = 512M
2203 EOF
2204   m systemctl restart $fpm
2205   # dunno if reload/restart is needed
2206   m systemctl reload apache2
2207   # note bk backups are defined in crontab outside this file
2208   ### end php setup for rc ###
2209
2210 fi # end roundcube setup
2211
2212 # * nextcloud setup
2213
2214 if [[ $HOSTNAME == bk ]]; then
2215   # from install checker, nextcloud/settings/admin/overview and
2216   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2217   # curl from the web installer requirement, but i switched to cli
2218   # it recommends php-file info, but that is part of php7.3-common, already got installed
2219   # with roundcube.
2220   m pi php-curl php-bz2 php-gmp php-bcmath php-imagick php-apcu
2221
2222   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2223   cat >/etc/php/$phpver/fpm/pool.d/localwww.conf <<'EOF'
2224 [www]
2225 clear_env = no
2226 EOF
2227
2228   for ((i=0; i < ${#bkdomains[@]}; i++)); do
2229     domain=${bkdomains[i]}
2230     ncdir=${ncdirs[i]}
2231     ncbase=${ncdir##*/}
2232     m cd /var/www
2233     if [[ ! -e $ncdir/index.php ]]; then
2234       # if we wanted to only install a specific version, use something like
2235       # file=latest-22.zip
2236       file=latest.zip
2237       m wget -nv -N https://download.nextcloud.com/server/releases/$file
2238       m rm -rf nextcloud
2239       m unzip -q $file
2240       m rm -f $file
2241       m chown -R www-data.www-data nextcloud
2242       m mv nextcloud $ncdir
2243       m cd $ncdir
2244       m sudo -u www-data php occ  maintenance:install --database sqlite --admin-user iank --admin-pass $nextcloud_admin_pass
2245     fi
2246     # note, strange this happend where updater did not increment the version var,
2247     # mine was stuck on 20. I manually updated it.
2248     m cd $ncdir/config
2249     if [[ ! -e config.php-orig ]]; then
2250       m cp -a config.php config.php-orig
2251     fi
2252     cat config.php-orig - >tmp.php <<EOF
2253 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/email_configuration.html
2254 \$CONFIG["mail_smtpmode"] = "sendmail";
2255 \$CONFIG["mail_smtphost"] = "127.0.0.1";
2256 \$CONFIG["mail_smtpport"] = 25;
2257 \$CONFIG["mail_smtptimeout"] = 10;
2258 \$CONFIG["mail_smtpsecure"] = "";
2259 \$CONFIG["mail_smtpauth"] = false;
2260 \$CONFIG["mail_smtpauthtype"] = "LOGIN";
2261 \$CONFIG["mail_smtpname"] = "";
2262 \$CONFIG["mail_smtppassword"] = "";
2263 \$CONFIG["mail_domain"] = "$domain";
2264
2265 # https://github.com/nextcloud/user_external#readme
2266 # plus mailinabox example
2267 #\$CONFIG['user_backends'] = array(array('class' => 'OC_User_IMAP','arguments' => array('127.0.0.1', 143, null),),);
2268
2269
2270 # based on installer check
2271 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/caching_configuration.html
2272 \$CONFIG['memcache.local'] = '\OC\Memcache\APCu';
2273
2274 \$CONFIG['overwrite.cli.url'] = 'https://$domain/nextcloud';
2275 \$CONFIG['htaccess.RewriteBase'] = '/nextcloud';
2276 \$CONFIG['trusted_domains'] = array (
2277         0 => '$domain',
2278     );
2279 #\$CONFIG[''] = '';
2280 fwrite(STDOUT, "<?php\n\\\$CONFIG = ");
2281 var_export(\$CONFIG);
2282 fwrite(STDOUT, ";\n");
2283 EOF
2284     m php tmp.php >config.php
2285     m rm -f tmp.php
2286     m sudo -u www-data php $ncdir/occ maintenance:update:htaccess
2287     list=$(sudo -u www-data php $ncdir/occ --output=json_pretty app:list)
2288     # user_external not compaible with nc 23
2289     for app in contacts calendar; do
2290       if [[ $(printf "%s\n" "$list"| jq ".enabled.$app") == null ]]; then
2291         m sudo -u www-data php $ncdir/occ app:install $app
2292       fi
2293     done
2294     i /etc/systemd/system/$ncbase.service <<EOF
2295 [Unit]
2296 Description=ncup $ncbase
2297 After=multi-user.target
2298
2299 [Service]
2300 Type=oneshot
2301 ExecStart=/usr/local/bin/ncup $ncbase
2302 User=www-data
2303 IOSchedulingClass=idle
2304 CPUSchedulingPolicy=idle
2305 EOF
2306     i /etc/systemd/system/$ncbase.timer <<EOF
2307 [Unit]
2308 Description=ncup $ncbase timer
2309
2310 [Timer]
2311 OnCalendar=Daily
2312
2313 [Install]
2314 WantedBy=timers.target
2315 EOF
2316     systemctl enable --now $ncbase.timer
2317     i /usr/local/bin/ncup <<'EOFOUTER'
2318 #!/bin/bash
2319 if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
2320 shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
2321 set -eE -o pipefail
2322 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR
2323
2324 ncbase=$1
2325 if ! php /var/www/$ncbase/updater/updater.phar -n; then
2326   echo failed nextcloud update for $ncbase >&2
2327   /sbin/exim -t <<EOF
2328 To: alerts@iankelling.org
2329 From: root@$(hostname -f)
2330 Subject: failed nextcloud update for $ncbase
2331
2332 For logs, run: jr -u $ncbase
2333 EOF
2334 fi
2335 EOFOUTER
2336     chmod +x /usr/local/bin/ncup
2337
2338     mkdir -p /var/www/cron-errors
2339     chown www-data.www-data /var/www/cron-errors
2340     i /etc/cron.d/$ncbase <<EOF
2341 PATH=/usr/sbin:/sbin:/usr/bin:/bin:/usr/local/bin
2342 SHELL=/bin/bash
2343 # https://docs.nextcloud.com/server/20/admin_manual/configuration_server/background_jobs_configuration.html
2344 */5  *  *  *  * www-data php -f $ncdir/cron.php --define apc.enable_cli=1 |& log-once nccron
2345 EOF
2346
2347   done
2348 fi
2349
2350
2351 # * exim host conditional config
2352
2353 # ** exim certs
2354
2355 all_dirs=(/p/c/filesystem)
2356 for x in /p/c/machine_specific/*.hosts /a/bin/ds/machine_specific/*.hosts; do
2357   if grep -qxF $HOSTNAME $x; then all_dirs+=( ${x%.hosts} ); fi
2358 done
2359 files=()
2360 for d in ${all_dirs[@]}; do
2361   f=$d/etc/exim4/passwd
2362   if [[ -e $f  ]]; then
2363     files+=($f)
2364   fi
2365   tmp=($d/etc/exim4/*.pem)
2366   if (( ${#tmp[@]} )); then
2367     files+=(${tmp[@]})
2368   fi
2369 done
2370
2371 if (( ${#files[@]} )); then
2372   sudo rsync -ahhi --chown=root:Debian-exim --chmod=0640 ${files[@]} /etc/exim4/
2373 fi
2374
2375
2376 # ** exim: auth
2377
2378 case $HOSTNAME in
2379   bk|je)
2380     # avoid accepting mail for invalid users
2381     # https://wiki.dovecot.org/LMTP/Exim
2382     cat >>/etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2383 deny
2384   message = invalid recipient
2385   domains = +local_domains
2386   !verify = recipient/callout=no_cache
2387 EOF
2388     i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2389 dovecot_plain:
2390   driver = dovecot
2391   public_name = PLAIN
2392   server_socket = /var/run/dovecot/auth-client
2393   server_set_id = $auth1
2394 EOF
2395     ;;
2396 esac
2397 if $bhost_t; then
2398   i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2399 # from 30_exim4-config_examples
2400 plain_server:
2401 driver = plaintext
2402 public_name = PLAIN
2403 server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
2404 server_set_id = $auth2
2405 server_prompts = :
2406 .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
2407 server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
2408 .endif
2409 EOF
2410 fi
2411
2412 # ** exim: main daemon use non-default config file
2413 case $HOSTNAME in
2414   bk|$MAIL_HOST)
2415     # to see the default comments in /etc/default/exim4:
2416     # s update-exim4defaults --force --init
2417     # which will overwrite any existing file
2418     i /etc/default/exim4 <<'EOF'
2419 QUEUERUNNER='combined'
2420 QUEUEINTERVAL='30m'
2421 COMMONOPTIONS='-C /etc/exim4/my.conf'
2422 UPEX4OPTS='-o /etc/exim4/my.conf'
2423 # i use epanic-clean for alerting if there are bad paniclog entries
2424 E4BCD_WATCH_PANICLOG='no'
2425 EOF
2426     chown Debian-exim:Debian-exim /usr/sbin/exim4
2427     # needs guid set in order to become Debian-exim
2428     chmod g+s,u+s /usr/sbin/exim4
2429     i /etc/exim4/trusted_configs <<'EOF'
2430 /etc/exim4/my.conf
2431 EOF
2432     ;;
2433   *)
2434     # default file
2435     i /etc/default/exim4 <<'EOF'
2436 QUEUERUNNER='combined'
2437 QUEUEINTERVAL='30m'
2438 EOF
2439     ;;
2440 esac
2441
2442 # ** exim non-root
2443
2444 case $HOSTNAME in
2445   bk|je|li)
2446     # no reason to expect it to ever be there.
2447     rm -fv /etc/systemd/system/exim4.service.d/nonroot.conf
2448     ;;
2449   *)
2450     dirs=()
2451     for d in /a /d /m /media /mnt /nocow /o /p /q; do
2452       if [[ -d $d ]]; then
2453         dirs+=($d)
2454       fi
2455     done
2456     i /etc/systemd/system/exim4.service.d/nonroot.conf <<EOF
2457 [Service]
2458 # see 56.2 Root privilege in exim spec
2459 AmbientCapabilities=CAP_NET_BIND_SERVICE
2460 # https://www.redhat.com/sysadmin/mastering-systemd
2461 # things that seem good and reasonabl.e
2462 PrivateTmp=yes
2463 ProtectHome=yes
2464 # note, in t10 systemd, if one of these is an sshfs mountpoint,
2465 # this whole setting doesnt work. tried it with a newer systemd 250 though
2466 # an nspawn, and it worked there.
2467 InaccessiblePaths=${dirs[@]}
2468 NoNewPrivileges=yes
2469 ProtectSystem=yes
2470
2471 # when we get newer systemd
2472 #ProtectDevices=yes
2473 EOF
2474     i /etc/exim4/conf.d/main/000_local-noroot <<'EOF'
2475 # see 56.2 Root privilege in exim spec
2476 deliver_drop_privilege = true
2477 EOF
2478     files=(
2479       300_exim4-config_real_local
2480       600_exim4-config_userforward
2481       700_exim4-config_procmail
2482       800_exim4-config_maildrop
2483       mmm_mail4root
2484     )
2485     for f in ${files[@]}; do
2486       echo "# iank: removed due to running nonroot"|i /etc/exim4/conf.d/router/$f
2487     done
2488     ;;
2489 esac
2490
2491 case $HOSTNAME in
2492
2493   # ** $MAIL_HOST|bk|je)
2494   $MAIL_HOST|bk|je)
2495
2496     echo|i /etc/exim4/conf.d/router/870_backup_local
2497
2498     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2499 # note: some things we don't set that are here by default because they are unused.
2500 dc_local_interfaces=''
2501 dc_eximconfig_configtype='internet'
2502 dc_localdelivery='dovecot_lmtp'
2503 EOF
2504     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2505 # recommended if dns is expected to work
2506 CHECK_RCPT_VERIFY_SENDER = true
2507 # default config comment says: If you enable this, you might reject legitimate mail,
2508 # but eggs has had this a long time, so that seems unlikely.
2509 CHECK_RCPT_SPF = true
2510 CHECK_RCPT_REVERSE_DNS = true
2511 CHECK_MAIL_HELO_ISSUED = true
2512
2513
2514 CHECK_DATA_LOCAL_ACL_FILE = /etc/exim4/conf.d/data_local_acl
2515 CHECK_RCPT_LOCAL_ACL_FILE = /etc/exim4/conf.d/rcpt_local_acl
2516
2517 # testing dmarc
2518 #dmarc_tld_file = /etc/public_suffix_list.dat
2519
2520 EOF
2521     ;;&
2522
2523   # ** $MAIL_HOST|bk)
2524   $MAIL_HOST|bk)
2525
2526     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2527 # je.b8.nz will run out of memory with freshclam
2528 av_scanner = clamd:/var/run/clamav/clamd.ctl
2529 EOF
2530
2531     cat >> /etc/exim4/conf.d/data_local_acl <<'EOF'
2532 deny
2533   malware = */defer_ok
2534   !condition = ${if match {$malware_name}{\N^Heuristic\N}}
2535   message = This message was detected as possible malware ($malware_name).
2536 EOF
2537
2538     cat >/etc/exim4/conf.d/main/000_local-nn <<EOF
2539 # MAIN_HARDCODE_PRIMARY_HOSTNAME might mess up the
2540 # smarthost config type, not sure.
2541 # failing message on mail-tester.com:
2542 # We check if there is a server (A Record) behind your hostname kd.
2543 # You may want to publish a DNS record (A type) for the hostname kd or use a different hostname in your mail software
2544 # https://serverfault.com/questions/46545/how-do-i-change-exim4s-primary-hostname-on-a-debian-box
2545 # and this one seemed appropriate from grepping config.
2546 # I originally set this to li.iankelling.org, but then ended up with errors when li tried to send
2547 # mail to kd, so this should basically be a name that no host has as their
2548 # canonical hostname since the actual host sits behind a nat and changes.
2549 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail.iankelling.org
2550 # I used this to avoid sender verification, didnt work but it still
2551 # makes sense based on the spec.
2552 hosts_treat_as_local = defaultnn.b8.nz
2553
2554 # Outside nn, we get the default cert location from a debian macro,
2555 # and the cert file is put in place by a certbot hook.
2556 MAIN_TLS_CERTIFICATE = /etc/exim4/fullchain.pem
2557 MAIN_TLS_PRIVATEKEY = /etc/exim4/privkey.pem
2558 EOF
2559
2560     i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost <<'EOF'
2561 gnusmarthost:
2562   debug_print = "R: smarthost for $local_part@$domain"
2563   driver = manualroute
2564   domains = ! +local_domains
2565 # send most mail through eggs, helps fsfs sender reputation.
2566 # uncomment and optionally move to 188 file to send through my own servers again
2567   senders = *@gnu.org
2568   transport = smarthost_dkim
2569   route_list = * fencepost.gnu.org::587 byname
2570   host_find_failed = ignore
2571   same_domain_copy_routing = yes
2572   no_more
2573 EOF
2574
2575     /a/exe/cedit defaultnn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2576 10.173.8.1 defaultnn.b8.nz
2577 EOF
2578     ;;&
2579   # ** $MAIL_HOST)
2580   $MAIL_HOST)
2581
2582     i /etc/exim4/conf.d/router/195_dnslookup_vpn <<'EOF'
2583 # copied from /etc/exim4/conf.d/router/200_exim4-config_primary, but
2584 # use vpn transport. lower priority so it overrides the default route.
2585 # Use this in case our vpn fails, we dont send anything without it.
2586 .ifdef DCconfig_internet
2587 dnslookup_vpn:
2588   debug_print = "R: dnslookup for $local_part@$domain"
2589   driver = dnslookup
2590   domains = ! +local_domains
2591   transport = remote_smtp_vpn
2592   same_domain_copy_routing = yes
2593   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
2594   no_more
2595 .endif
2596 EOF
2597
2598
2599     # note on backups: I used to do an automatic sshfs and restricted
2600     # permissions to a specific directory on the remote server, /bu/mnt,
2601     # which required using a dedicated user, but realized smtp will be
2602     # more reliable and less fuss. If I ever need that again, see the
2603     # history of this file, and bum in brc2.
2604
2605     i /etc/exim4/conf.d/router/890_backup_copy <<EOF
2606 ### router/900_exim4-config_local_user
2607 #################################
2608
2609 # todo, it would be nice to save sent email too,
2610 # but its not so important, they still exist in my head
2611
2612 backup_redir:
2613 driver = redirect
2614 domains = +local_domains
2615 # b is just an arbirary short string
2616 data = b@eximbackup.b8.nz
2617 # note, to test this, i could temporarily allow testignore.
2618 # alerts avoids potential mail loop. root is already
2619 # redirected earlier, so that is just being overly cautious.
2620 local_parts = ! root : ! testignore : ! alerts
2621 unseen = true
2622
2623 backup_copy:
2624 driver = manualroute
2625 domains = eximbackup.b8.nz
2626 transport = backup_remote
2627 ignore_target_hosts = ${HOSTNAME}wg.b8.nz
2628 # note changes here also require change in passwd.client
2629 route_list = * eximbackup.b8.nz
2630 same_domain_copy_routing = yes
2631 errors_to = alerts@iankelling.org
2632 no_more
2633 EOF
2634
2635
2636     i /etc/exim4/conf.d/transport/30_backup_remote <<'EOF'
2637 backup_remote:
2638   driver = smtp
2639   multi_domain
2640 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
2641   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
2642 .endif
2643   hosts_require_auth = *
2644   hosts_try_auth = *
2645   envelope_to_add
2646   # manual return path because we want it to be the envelope sender
2647   # we got not the one we are using in this smtp transport
2648   headers_add = "Return-path: $sender_address"
2649 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2650   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2651 .endif
2652 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2653   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2654 .endif
2655 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2656   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2657 .endif
2658 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
2659   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
2660 .endif
2661 .ifdef REMOTE_SMTP_HEADERS_REWRITE
2662   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
2663 .endif
2664 .ifdef REMOTE_SMTP_HELO_DATA
2665   helo_data=REMOTE_SMTP_HELO_DATA
2666 .endif
2667 .ifdef TLS_DH_MIN_BITS
2668 tls_dh_min_bits = TLS_DH_MIN_BITS
2669 .endif
2670 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2671 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2672 .endif
2673 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2674 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2675 .endif
2676 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2677   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2678 .endif
2679 EOF
2680
2681
2682     # this avoids some error. i cant remember what. todo:
2683     # test it out and document why/if its needed.
2684     #     i /etc/exim4/host_local_deny_exceptions <<'EOF'
2685     # mail.fsf.org
2686     # *.posteo.de
2687     # EOF
2688
2689     # cron email from smarthost hosts will automatically be to
2690     # USER@FQDN. I redirect that to alerts@, on the smarthosts, but in
2691     # case that doesn't work, we still want to accept that mail, but not
2692     # from any host except the smarthosts. local_hostnames and this rule
2693     # is for that purpose.
2694     i /etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2695 deny
2696   !authenticated = *
2697   domains = +local_hostnames
2698   message = no relay
2699 EOF
2700     echo|i /etc/exim4/conf.d/router/880_universal_forward
2701
2702
2703     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2704 MAILDIR_HOME_MAILDIR_LOCATION = /m/md/Sent
2705 EOF
2706
2707     # for iank@fsf.org, i have mail.fsf.org forward it to fsf@iankelling.org.
2708     # and also have mail.iankelling.org whitelisted as a relay domain.
2709     # I could avoid that if I changed this to submit to 587 with a
2710     # password like a standard mua.
2711     i /etc/exim4/conf.d/router/188_exim4-config_smarthost <<'EOF'
2712 # ian: save a copy of sent mail. i thought of other ways to
2713 # do this, for example, to only save sent mail that is not sent
2714 # from my mail client which saves a copy by default, but in the
2715 # end, it seems simplest to turn that off. We want to save
2716 # external mail sent by smarthosts.
2717 sentarchive:
2718   driver = redirect
2719   domains = ! +local_domains
2720   condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
2721   data    = vojdedIdNejyebni@b8.nz
2722   unseen
2723
2724 # ian: copied from /etc/exim4/conf.d/router/200_exim4-config_primary, and added senders = and
2725 # replaced DCsmarthost with hostname
2726 fsfsmarthost:
2727   debug_print = "R: smarthost for $local_part@$domain"
2728   driver = manualroute
2729   domains = ! +local_domains
2730   senders = *@fsf.org
2731   transport = remote_smtp_smarthost
2732   route_list = * mail.fsf.org::587 byname
2733   host_find_failed = ignore
2734   same_domain_copy_routing = yes
2735   no_more
2736
2737 posteosmarthost:
2738   debug_print = "R: smarthost for $local_part@$domain"
2739   driver = manualroute
2740   domains = ! +local_domains
2741   senders = *@posteo.net
2742   transport = remote_smtp_smarthost
2743   route_list = * posteo.de::587 byname
2744   host_find_failed = ignore
2745   same_domain_copy_routing = yes
2746   no_more
2747 EOF
2748
2749     # Greping /etc/exim4, unqualified mails this would end up as
2750     # a return path, so it should go somewhere we will see.
2751     # The debconf output about mailname is as follows:
2752     # The 'mail name' is the domain name used to 'qualify' mail addresses without a domain
2753     # name.
2754     # This name will also be used by other programs. It should be the single, fully
2755     # qualified domain name (FQDN).
2756     # Thus, if a mail address on the local host is foo@example.org, the correct value for
2757     # this option would be example.org.
2758     # This name won\'t appear on From: lines of outgoing messages if rewriting is enabled.
2759     echo iankelling.org > /etc/mailname
2760
2761
2762     # mail.iankelling.org so local imap clients can connect with tls and
2763     # when they happen to not be local.
2764     # todo: this should be 10.8.0.4
2765
2766     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2767 # note: i put nn.b8.nz into bind for good measure
2768 10.173.8.2 nn.b8.nz mx.iankelling.org
2769 EOF
2770
2771     # note: systemd-resolved will consult /etc/hosts, dnsmasq wont. this assumes
2772     # weve configured this file in dnsmasq if we are using it.
2773     /a/exe/cedit mail /etc/dnsmasq-servers.conf <<'EOF' || [[ $? == 1 ]]
2774 server=/mx.iankelling.org/127.0.1.1
2775 EOF
2776     # I used to use debconf-set-selections + dpkg-reconfigure,
2777     # which then updates this file
2778     # but the process is slower than updating it directly and then I want to set other things in
2779     # update-exim4.conf.conf, so there's no point.
2780     # The file is documented in man update-exim4.conf,
2781     # except the man page is not perfect, read the bash script to be sure about things.
2782
2783     # The debconf questions output is additional documentation that is not
2784     # easily accessible, but super long, along with the initial default comment in this
2785     # file, so I've saved that into ./mail-notes.conf.
2786     #
2787     # # TODO: remove mx.iankelling.org once systems get updated mail-setup from jan 2022
2788     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2789 # man page: is used to build the local_domains list, together with "localhost"
2790 # this is duplicated in a later router.
2791 dc_other_hostnames='iankelling.org;zroe.org;r2e.iankelling.org;mx.iankelling.org;!je.b8.nz;!bk.b8.nz;*.b8.nz;b8.nz'
2792 EOF
2793
2794
2795     # dmarc. not used currently
2796     f=/etc/cron.daily/refresh-dmarc-tld-file
2797     cat >$f <<'EOF'
2798 #!/bin/bash
2799 cd /etc
2800 wget -q -N https://publicsuffix.org/list/public_suffix_list.dat
2801 EOF
2802     m chmod 755 $f
2803
2804     ;;
2805   # ** bk
2806   ## we use this host to monitor MAIL_HOST and host a mail server for someone
2807   bk)
2808
2809     echo|i /etc/exim4/conf.d/rcpt_local_acl
2810     echo|i /etc/exim4/conf.d/router/880_universal_forward
2811
2812     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2813 10.173.8.2 nn.b8.nz
2814 EOF
2815
2816     sed -r -f - /etc/init.d/exim4  <<'EOF' | i /etc/init.d/exim4in
2817 s,/etc/default/exim4,/etc/default/exim4in,g
2818 s,/run/exim4/exim.pid,/run/exim4/eximin.pid,g
2819 s,(^[ #]*Provides:).*,\1 exim4in,
2820 s,(^[ #]*NAME=).*,\1"exim4in",
2821 EOF
2822     chmod +x /etc/init.d/exim4in
2823     i /etc/systemd/system/exim4in.service.d/alwaysrestart.conf <<'EOF'
2824 [Unit]
2825 # needed to continually restart
2826 StartLimitIntervalSec=0
2827
2828 [Service]
2829 Restart=always
2830 # time to sleep before restarting a service
2831 RestartSec=20
2832 EOF
2833
2834     i /etc/default/exim4in <<'EOF'
2835 # defaults but no queue runner and alternate config dir
2836 QUEUERUNNER='no'
2837 COMMONOPTIONS='-oP /run/exim4/eximin.pid'
2838 UPEX4OPTS='-d /etc/myexim4'
2839 EOF
2840
2841     echo bk.b8.nz > /etc/mailname
2842     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2843 # man page: is used to build the local_domains list, together with "localhost"
2844 dc_other_hostnames='amnimal.ninja;expertpathologyreview.com;bk.b8.nz'
2845 EOF
2846
2847     ;;
2848   # ** je
2849   je)
2850     echo je.b8.nz > /etc/mailname
2851     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2852 dc_other_hostnames='je.b8.nz'
2853 EOF
2854     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2855     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2856     echo|i /etc/exim4/conf.d/rcpt_local_acl
2857     echo|i /etc/exim4/conf.d/router/880_universal_forward
2858     ;;
2859   # ** not MAIL_HOST|bk|je
2860   *)
2861     # this one should be removed for all non mail hosts, but
2862     # bk and je never become mail_host
2863     echo|i /etc/exim4/conf.d/router/195_dnslookup_vpn
2864
2865     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2866     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2867     echo|i /etc/exim4/conf.d/rcpt_local_acl
2868     echo|i /etc/exim4/conf.d/router/890_backup_copy
2869     echo|i /etc/exim4/conf.d/main/000_local-nn
2870
2871
2872     if $bhost_t; then
2873       cat >>/etc/exim4/conf.d/main/000_local <<EOF
2874 MAIN_TLS_CERTIFICATE = /etc/exim4/certs/$wghost/fullchain.pem
2875 MAIN_TLS_PRIVATEKEY = /etc/exim4/certs/$wghost/privkey.pem
2876 # so we can maintiain the originals of the backups.
2877 # we wouldnt want this if we were dealing with any other
2878 # local deliveries, but we sent all others to the smarthost
2879 # which then strips the headers.
2880 envelope_to_remove = false
2881 return_path_remove = false
2882 EOF
2883     fi
2884
2885     # catches things like cronjob email
2886     i /etc/exim4/conf.d/router/880_universal_forward <<'EOF'
2887 universal_forward:
2888   driver = redirect
2889   domains = +local_domains
2890   data = alerts@iankelling.org
2891 EOF
2892
2893
2894     for unit in ${nn_progs[@]}; do
2895       f=/etc/systemd/system/$unit.service.d/nn.conf
2896       rm -fv $f
2897     done
2898
2899     # dont i dont care if defaultnn section gets left, it wont
2900     # get used.
2901     echo | /a/exe/cedit nn /etc/hosts || [[ $? == 1 ]]
2902     echo | /a/exe/cedit mail /etc/dnsmasq-servers.conf || [[ $? == 1 ]]
2903
2904
2905     if $bhost_t; then
2906       install -d /bu
2907       install -d -g Debian-exim -o Debian-exim -m 771 /bu/md
2908       if [[ -e /bu/md/cur && $(stat -c %u /bu/md/cur) == 1000 ]]; then
2909         chown -R Debian-exim:Debian-exim /bu/md
2910       fi
2911       i /etc/exim4/conf.d/transport/30_backup_maildir <<EOF
2912 # modified debian maildir transport
2913 backup_maildir:
2914   driver = appendfile
2915   directory = /bu/md
2916   delivery_date_add
2917   # note, no return path or envelope added
2918   maildir_format
2919   directory_mode = 0700
2920   mode = 0644
2921   mode_fail_narrower = false
2922 EOF
2923
2924       i /etc/exim4/conf.d/router/870_backup_local <<'EOF'
2925 ### router/900_exim4-config_local_user
2926 #################################
2927
2928 backup_local:
2929   debug_print = "R: local_user for $local_part@$domain"
2930   driver = accept
2931   domains = eximbackup.b8.nz
2932   transport = backup_maildir
2933 EOF
2934
2935       # Bind to wghole to receive mailbackup.
2936       wgholeip=$(sed -rn 's/^ *Address *= *([^/]+).*/\1/p' /etc/wireguard/wghole.conf)
2937       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2938 dc_other_hostnames='eximbackup.b8.nz'
2939 dc_local_interfaces='127.0.0.1;::1;$wgholeip'
2940 EOF
2941
2942       # wghole & thus exim will fail to start without internet connectivity.
2943       i /etc/systemd/system/exim4.service.d/backup.conf <<'EOF'
2944 [Unit]
2945 StartLimitIntervalSec=0
2946
2947 [Service]
2948 Restart=always
2949 RestartSec=20
2950 EOF
2951
2952     else
2953       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2954 # Note: If theres like a temporary problem where mail gets sent to
2955 # one of these hosts, if exim isnt listening, it will be a temporary error
2956 # instead of a permanent 5xx.
2957 dc_local_interfaces='127.0.0.1;::1'
2958 EOF
2959       rm -fv /etc/systemd/system/exim4.service.d/backup.conf
2960     fi
2961     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2962 dc_eximconfig_configtype='smarthost'
2963 dc_smarthost='$smarthost'
2964 EOF
2965
2966     hostname -f |i /etc/mailname
2967     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2968 # The manpage incorrectly states this will do header rewriting, but
2969 # that only happens if we have dc_hide_mailname is set.
2970 dc_readhost='iankelling.org'
2971 # Only used in case of bounces.
2972 dc_localdelivery='maildir_home'
2973 EOF
2974     ;;
2975 esac
2976
2977
2978
2979
2980 # ** $MAILHOST|bk, things that belong at the end
2981 case $HOSTNAME in
2982   $MAIL_HOST|bk)
2983     # config for the non-nn exim
2984     m rsync -ra --delete /etc/exim4/ /etc/myexim4
2985     cat >>/etc/myexim4/conf.d/main/000_local-nn <<'EOF'
2986 # this makes it easier to see which exim is doing what
2987 log_file_path = /var/log/exim4/my%s
2988 EOF
2989
2990     cat >/etc/logrotate.d/myexim <<'EOF'
2991 /var/log/exim4/mymain /var/log/exim4/myreject {
2992         daily
2993         missingok
2994         rotate 1000
2995         delaycompress
2996         notifempty
2997         nocreate
2998 }
2999 /var/log/exim4/mypanic {
3000         size 10M
3001         missingok
3002         rotate 10
3003         compress
3004         delaycompress
3005         notifempty
3006         nocreate
3007 }
3008 EOF
3009
3010     # If we ever wanted to have a separate spool,
3011     # we could do it like this.
3012     #     cat >>/etc/exim4/conf.d/main/000_local-nn <<'EOF'
3013     # spool_directory = /var/spool/myexim4
3014     # EOF
3015     cat >>/etc/myexim4/update-exim4.conf.conf <<'EOF'
3016 dc_eximconfig_configtype='smarthost'
3017 dc_smarthost='nn.b8.nz'
3018 EOF
3019     ;;&
3020   bk)
3021
3022     # config for the non-nn exim
3023     cat >/etc/myexim4/conf.d/main/000_local-nn <<'EOF'
3024 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail2.iankelling.org
3025 EOF
3026     ;;
3027   $MAIL_HOST)
3028     # for bk, we have a exim4in.service that will do this for us.
3029     m update-exim4.conf -d /etc/myexim4
3030     ;;
3031 esac
3032
3033 # * spool dir setup
3034
3035 # ** bind mount setup
3036 # put spool dir in directory that spans multiple distros.
3037 # based on http://www.postfix.org/qmgr.8.html and my notes in gnus
3038 #
3039 dir=/nocow/exim4
3040 sdir=/var/spool/exim4
3041 # we only do this if our system has $dir
3042
3043 # this used to do a symlink, but, in the boot logs, /nocow would get mounted succesfully,
3044 # about 2 seconds later, exim starts, and immediately puts into paniclog:
3045 # honVi-0000u3-82 Failed to create directory "/var/spool/exim4/input": No such file or directory
3046 # so, im trying a bind mount to get rid of that.
3047 if [[ -e /nocow ]]; then
3048   if ! grep -Fx "/nocow/exim4  /var/spool/exim4  none  bind  0 0" /etc/fstab; then
3049     echo "/nocow/exim4  /var/spool/exim4  none  bind  0 0" >>/etc/fstab
3050   fi
3051   i /etc/systemd/system/exim4.service.d/override.conf <<'EOF'
3052 [Unit]
3053 # without local-fs on exim, we get these kind of errors in paniclog on shutdown:
3054 # Failed to create spool file /var/spool/exim4//input//1jCLxz-0008V4-V9-D: Permission denied
3055 After=local-fs.target
3056
3057 [Service]
3058 ExecStartPre=/usr/local/bin/exim-nn-iptables
3059 EOF
3060   if ! mountpoint -q $sdir; then
3061     stopifactive exim4 exim4in
3062     if [[ -L $sdir ]]; then
3063       m rm $sdir
3064     fi
3065     if [[ ! -e $dir && -d $sdir ]]; then
3066       m mv $sdir $dir
3067     fi
3068     if [[ ! -d $sdir ]]; then
3069       m mkdir $sdir
3070       m chmod 000 $sdir # only want it to be used when its mounted
3071     fi
3072     m mount $sdir
3073   fi
3074 fi
3075
3076
3077
3078 # ** exim/spool uid setup
3079 # i have the spool directory be common to distro multi-boot, so
3080 # we need the uid to be the same. 608 cuz it's kind of in the middle
3081 # of the free system uids.
3082 IFS=:; read -r _ _ uid _ < <(getent passwd Debian-exim ||:) ||:; unset IFS
3083 IFS=:; read -r _ _ gid _ < <(getent group Debian-exim ||:) ||:; unset IFS
3084 if [[ ! $uid ]]; then
3085   # from /var/lib/dpkg/info/exim4-base.postinst, plus uid and gid options
3086   m adduser --uid 608 --system --group --quiet --home /var/spool/exim4 \
3087     --no-create-home --disabled-login --force-badname Debian-exim
3088 elif [[ $uid != 608 ]]; then
3089   stopifactive exim4 exim4in
3090   m usermod -u 608 Debian-exim
3091   m groupmod -g 608 Debian-exim
3092   m usermod -g 608 Debian-exim
3093   m find / /nocow -xdev -path ./var/tmp -prune -o -uid $uid -execdir chown -h 608 {} +
3094   m find / /nocow -xdev -path ./var/tmp -prune -o -gid $gid -execdir chgrp -h 608 {} +
3095 fi
3096
3097 # * start / stop services
3098
3099 reifactive dnsmasq nscd
3100
3101 if $reload; then
3102   m systemctl daemon-reload
3103 fi
3104
3105 sysd-prom-fail-install epanicclean
3106 m systemctl --now enable epanicclean
3107
3108 case $HOSTNAME in
3109   je)
3110     /a/exe/web-conf apache2 je.b8.nz
3111     ;;
3112   bk)
3113     /a/exe/web-conf apache2 mail2.iankelling.org
3114     ;;
3115 esac
3116
3117 m /a/bin/ds/mail-cert-cron -1
3118 sre mailcert.timer
3119
3120 case $HOSTNAME in
3121   $MAIL_HOST|bk)
3122     m systemctl --now enable mailnn mailnnroute
3123     ;;&
3124   $MAIL_HOST)
3125     # we use dns to start wg
3126     if $reload; then
3127       sre unbound
3128     else
3129       m systemctl --now enable unbound
3130     fi
3131     ;;&
3132   $MAIL_HOST|bk)
3133     # If these have changes, id rather manually restart it, id rather
3134     # not restart and cause temporary errors
3135     if $reload; then
3136       sre $vpnser
3137     else
3138       m systemctl --now enable $vpnser
3139     fi
3140     if ! systemctl is-active clamav-daemon >/dev/null; then
3141       m systemctl --now enable clamav-daemon
3142       out=$(rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/filesystem/etc/systemd/system/epanicclean.service /etc/systemd/system)
3143       if [[ $out ]]; then
3144         reload=true
3145       fi
3146
3147       # note, this will cause paniclog entries because it takes like 45
3148       # seconds for clamav to start, i use ./epanic-clean to remove
3149       # them.
3150     fi
3151     ;;&
3152   $MAIL_HOST|bk|je)
3153     # start spamassassin/dovecot before exim.
3154     sre dovecot spamassassin
3155     # need to wait a bit before restarting exim, else I
3156     # get a paniclog entry like: spam acl condition: all spamd servers failed
3157     sleep 3
3158     m systemctl --now enable mailclean.timer
3159     ;;&
3160   $MAIL_HOST)
3161     # < 2.1 (eg: in t9), uses a different data format which required manual
3162     # migration. dont start if we are running an old version.
3163     if dpkg --compare-versions "$(dpkg -s radicale | awk '$1 == "Version:" { print $2 }')" ge 2.1; then
3164       m systemctl --now enable radicale
3165     fi
3166     ;;&
3167 esac
3168
3169 # last use of $reload happens in previous block
3170 rm -f /var/local/mail-setup-reload
3171
3172
3173 case $HOSTNAME in
3174   $MAIL_HOST|bk|je|li)
3175     # on li, these are never started, except $vpnser
3176     :
3177     ;;
3178   *)
3179     soff radicale mailclean.timer dovecot spamassassin $vpnser mailnn clamav-daemon
3180     ;;
3181 esac
3182
3183 sre exim4
3184
3185 case $HOSTNAME in
3186   $MAIL_HOST)
3187     m systemctl --now enable mailbindwatchdog
3188     ;;
3189   *)
3190     soff mailbindwatchdog
3191     ;;
3192 esac
3193
3194
3195 case $HOSTNAME in
3196   bk) sre exim4in ;;
3197 esac
3198
3199 # * mail monitoring / testing
3200
3201 # note, to test clamav, send an email with body that only contains
3202 # https://en.wikipedia.org/wiki/EICAR_test_file
3203 # which set malware_name to Eicar-Signature
3204 case $HOSTNAME in
3205   $MAIL_HOST|bk|je)
3206     # note: cronjob "ian" also does some important monitoring
3207     # todo: this will sometimes cause an alert because mailtest-check will run
3208     # before we have setup network namespace and spamassassin
3209     i /etc/cron.d/mailtest <<EOF
3210 SHELL=/bin/bash
3211 PATH=/usr/bin:/bin:/usr/local/bin
3212 MAILTO=daylert@iankelling.org
3213 */5  * * * *   $u send-test-forward |& log-once send-test-forward
3214 */10 * * * *   root chmod -R g+rw /m/md/bounces |& log-once -1 bounces-chmod
3215 # if a bounce happened yesterday, dont let it slip through the cracks
3216 8   1 * * *   root export MAILTO=alerts@iankelling.org; [[ -s /var/log/exim4/mainlog.1 ]] && awk '\$5 == "**"' /var/log/exim4/mainlog.1
3217 EOF
3218
3219
3220     m sudo rsync -ahhi --chown=root:root --chmod=0755 \
3221       /b/ds/mailtest-check /b/ds/check-remote-mailqs /usr/local/bin/
3222     i /etc/systemd/system/mailtest-check.service <<'EOF'
3223 [Unit]
3224 Description=mailtest-check
3225 After=local-fs.target
3226 StartLimitIntervalSec=0
3227
3228 [Service]
3229 Type=simple
3230 ExecStart=/usr/local/bin/mailtest-check slow
3231 Restart=always
3232 RestartSec=60
3233
3234 [Install]
3235 WantedBy=graphical.target
3236 EOF
3237     sysd-prom-fail-install mailtest-check
3238     sre mailtest-check
3239     ;;&
3240   $MAIL_HOST)
3241     test_froms=(ian@iankelling.org z@zroe.org iank@gnu.org)
3242     test_tos=(testignore@expertpathologyreview.com testignore@je.b8.nz testignore@amnimal.ninja jtuttle@gnu.org)
3243
3244     cat >>/etc/cron.d/mailtest <<EOF
3245 0   13 * * *  root echo "1pm alert. You are not in the matrix."
3246 2   * * * *   root check-remote-mailqs |& log-once check-remote-mailqs
3247 EOF
3248     ;;&
3249   bk)
3250     test_froms=(testignore@amnimal.ninja testignore@expertpathologyreview.com)
3251     test_tos=(testignore@iankelling.org testignore@je.b8.nz)
3252     # We dont need to send from different addresses to the same
3253     # address. this breaks down our nice elegant logic of building up
3254     # froms and tos , so I just handle expertpath in a special case
3255     # below and set the to: to be testignore@zroe.org.  If we did sent
3256     # that way, it would also mess up our mailtest-check logic that
3257     # finds which messages to check.
3258     # for example: from testignore@amnimal.ninja to: testignore@iankelling.org testignore@zroe.org
3259     # that would become 2 messages and we'd only check 1.
3260     ;;&
3261   je)
3262     test_froms=(testignore@je.b8.nz)
3263     test_tos=(testignore@iankelling.org testignore@zroe.org testignore@expertpathologyreview.com testignore@amnimal.ninja)
3264     ;;&
3265   $MAIL_HOST|bk|je)
3266
3267     # Dont put these test messages into the sent folder or else it will
3268     # overwhelm it, plus i dont want to save a copy at all.
3269     rm -f /etc/exim4/ignore-sent
3270     for t in ${test_tos[@]}; do
3271       echo $t >> /etc/exim4/ignore-sent
3272     done
3273
3274     cat >/usr/local/bin/send-test-forward <<'EOF'
3275 #!/bin/bash
3276 # we remove from the queue older than 4.3 minutes since we send every 5 minutes.
3277 olds=(
3278 $(/usr/sbin/exiqgrep -o 260 -i -r '^(testignore@(iankelling\.org|zroe\.org|expertpathologyreview\.com|amnimal\.ninja|je\.b8\.nz)|jtuttle@gnu\.org)$')
3279 )
3280 if (( ${#olds[@]} )); then
3281   /usr/sbin/exim -Mrm "${olds[@]}" >/dev/null
3282 fi
3283 EOF
3284     for test_from in ${test_froms[@]}; do
3285
3286       test_to=${test_tos[0]}
3287       for t in ${test_tos[@]:1}; do
3288         test_to+=", $t"
3289       done
3290       case $test_from in
3291         testignore@expertpathologyreview.com)
3292           test_to=testignore@zroe.org
3293           ;;
3294       esac
3295
3296       cat >>/usr/local/bin/send-test-forward <<EOFOUTER
3297 /usr/sbin/exim -f $test_from -t <<EOF
3298 From: $test_from
3299 To: $test_to
3300 Subject: test \$(date +%Y-%m-%dT%H:%M:%S%z) \$EPOCHSECONDS
3301
3302 /usr/local/bin/send-test-forward
3303 EOF
3304 EOFOUTER
3305     done
3306     m chmod +x /usr/local/bin/send-test-forward
3307     ;;
3308   *)
3309     soff mailtest-check.service
3310     rm -fv /etc/cron.d/mailtest \
3311        /var/lib/prometheus/node-exporter/mailtest-check.prom* \
3312        /var/local/cron-errors/check-remote-mailqs*
3313     ;;
3314 esac
3315
3316
3317
3318 # * misc
3319 m sudo -u $u mkdir -p /home/$u/.cache
3320 set -- /m/mucache /home/$u/.cache/mu /m/.mu /home/$u/.mu
3321 while (($#)); do
3322   target=$1
3323   f=$2
3324   shift 2
3325   if [[ ! -L $f ]]; then
3326     if [[ -e $f ]]; then
3327       rm -rf $f
3328     fi
3329     m sudo -u $u ln -sf -T $target $f
3330   fi
3331 done
3332
3333
3334 # /etc/alias setup is debian specific, and exim postinst script sets up
3335 # an /etc/alias from root to the postmaster, based on the question
3336 # exim4-config exim4/dc_postmaster, as long as there exists an entry for
3337 # root, or there was no preexisting aliases file. postfix won\'t set up
3338 # a root to $postmaster alias if it\'s already installed. Easiest to
3339 # just set it ourselves.
3340
3341 # debconf question for postmaster:
3342 # Mail for the 'postmaster', 'root', and other system accounts needs to be redirected
3343 # to the user account of the actual system administrator.
3344 # If this value is left empty, such mail will be saved in /var/mail/mail, which is not
3345 # recommended.
3346 # Note that postmaster\'s mail should be read on the system to which it is directed,
3347 # rather than being forwarded elsewhere, so (at least one of) the users listed here
3348 # should not redirect their mail off this machine. A 'real-' prefix can be used to
3349 # force local delivery.
3350 # Multiple user names need to be separated by spaces.
3351 # Root and postmaster mail recipient:
3352
3353 m exit 0
3354 :
3355
3356 # Local Variables:
3357 # eval: (outline-minor-mode)
3358 # outline-regexp: "\\( *\\)# [*]\\{1,8\\} "
3359 # End:
3360 # this is combined with defining outline-level in init.el