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 #  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.
   7 #  todo: consider hardening cups listening on 0.0.0.0
   8 #  todo: stop/disable local apache, and rpc.mountd, and kdeconnect when not in use.
   9 #  todo: check that spamd and unbound only listen locally.
  10
  11 # todo:  hosts should only allow external mail that is authed and
  12 # destined for backup route. it is a minor issue since traffic is
  13 # limited to the wghole network.
  14
  15 # todo: emailing info@amnimal.ninja produces a bounce, user doesn't exist
  16 # instead of a simple rejection like it should.
  17
  18 # todo: run mailping test after running, or otherwise
  19 # clear out terminal alert
  20
  21 # todo: reinstall bk with bigger filesystem
  22
  23 # todo: on bk, dont send email if mailvpn is not up
  24
  25 # todo: mailtest-check should check on bk too
  26
  27 # todo: disable postgrey
  28
  29 # todo: in testforward-check, we should also look
  30
  31 # todo: test that bounces dont help create valid mailtest-check
  32
  33 # todo: move mail stuff in distro-end into this file
  34
  35 # todo: consider rotating dkim & publishing key so every past email I sent
  36 # isnt necessarily signed
  37
  38 # todo: consider how to get clamav out of Debian-exim group
  39 # so it cant read/write the whole mail spool, for better
  40 # security.
  41
  42 # todo: create a cronjob to update or warn on expiring dnssec keys
  43
  44 # todo: we should test failed mail daily or so
  45 # failed cronjob, failed sysd-log-once,
  46 # a local bounce from a cronjob, a local bounce
  47 # to a bad remote address, perhaps a local failure
  48 # when the sending daemon is down.
  49 # And send an alert email if no alerts have been sent
  50 # in 2 or 3 days or something. todo, test cron mail on li.
  51
  52 # todo: look at mailinabox extra dns records, note these changelogs:
  53 # - 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.
  54 # - 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.
  55 #
  56
  57 # todo: mailtest-check failure on remote hosts is not going to alert me.
  58 # sort that out.
  59 # todo: test mail failure as well as success.
  60 #
  61 # todo: validate that mailtest-check is doing dnsbl checks.
  62
  63 # background: I want to run exim in a network namespace so it can send
  64 # and receive through a vpn. This is needed so it can do ipv6, because
  65 # outside the namespace if we dont have ipv6, to send ipv6 through the
  66 # vpn, we have to send all our ipv6 through the vpn. I did this for a
  67 # long time, it was fine, but it causes various pains, like increased
  68 # latency, increased recaptcha because my ip is from a data center, just
  69 # various issues I dont want on all the time. The problem with the
  70 # namespace is that all kinds of programs want to invoke exim, but they
  71 # wont be in the namespace. I could replace exim with a wrapper that
  72 # jumps into the namespace, i tried that, it works fine.  One remaining
  73 # problem was that I would have needed to hook into exim upgrades to
  74 # move exim and replace it with my wrapper script. Also, my script to
  75 # join the namespace is not super reliable because it uses a pgrep.
  76 # Instead, I should have created a systemd service for a process that
  77 # will never die and just writes its pid somewhere convenient.
  78 # That implementation
  79 # is below here:
  80 #
  81 # sudoers:
  82 # user ALL=(ALL) /usr/sbin/exim4
  83 #
  84 # move exim4 to eximian, use this script for exim4:
  85 #
  86 # #!/bin/bash
  87 # if ip a show veth1-mail &>/dev/null; then
  88 #   /usr/sbin/eximian "$@"
  89 #   exit
  90 # fi
  91 # dosudo=false
  92 # if [[ $USER && $USER != root ]]; then
  93 #   dosudo=true
  94 # fi
  95 # pid=$(pgrep -f "/usr/sbin/openvpn .* --config /etc/openvpn/.*mail.conf")
  96 # if $dosudo; then
  97 #   sudo nsenter -t $pid -n -m sudo -u $USER /usr/sbin/eximian "$@"
  98 # else
  99 #   nsenter -t $pid -n -m /usr/sbin/eximian "$@"
 100 # fi
 101 # ## end script
 102 #
 103 # an alternate solution: there is a small setguid program for
 104 # network namespaces in my bookmarks.
 105 #
 106 # However, the solution I went with is: have 2 exim
 107 # configs. A nonstandard location for the daemon that runs
 108 # in the namespace. For all other invocations, it uses
 109 # the default config location, which is altered to be
 110 # in a smarthost config which sends mail to the deaemon.
 111 #
 112 # I have a bash function, enn to invoke exim like the daemon is running.
 113 # and mailbash to just enter its network namespace.
 114
 115 if [ -z "$BASH_VERSION" ]; then echo "error: shell is not bash" >&2; exit 1; fi
 116
 117 shopt -s nullglob
 118
 119 if [[ -s /usr/local/lib/err ]]; then
 120   source /usr/local/lib/err
 121 elif [[ -s /a/bin/errhandle/err ]]; then
 122   source /a/bin/errhandle/err
 123 else
 124   err "no err tracing script found"
 125 fi
 126 source /a/bin/distro-functions/src/identify-distros
 127 source /a/bin/distro-functions/src/package-manager-abstractions
 128
 129 # has nextcloud_admin_pass in it
 130 f=/p/c/machine_specific/$HOSTNAME/mail
 131 if [[ -e $f ]]; then
 132   # shellcheck source=/p/c/machine_specific/bk/mail
 133   source $f
 134 fi
 135
 136
 137 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
 138
 139
 140 u=$(id -nu 1000)
 141
 142
 143 usage() {
 144   cat <<EOF
 145 Usage: ${0##*/} anything_here_to_debug
 146 Setup exim4 & dovecot & related things
 147
 148 -h|--help  Print help and exit.
 149 EOF
 150   exit $1
 151 }
 152
 153 # debug output if we pass any arg
 154 if (( $# )); then
 155   set -x
 156 fi
 157
 158
 159 ####### instructions for icedove #####
 160 # Incoming mail server: mail.iankelling.org, port 143, username iank, connection security starttls, authentication method normal password,
 161 # then click advanced so it accepts it.
 162 # we could also just use 127.0.0.1 with no ssl
 163 #
 164 # hamburger -> preferences -> preferences -> advanced tab -> config editor button -> security.ssl.enable_ocsp_must_staple = false
 165 # background: dovecot does not yet have ocsp stapling support
 166 # reference: https://community.letsencrypt.org/t/simple-guide-using-lets-encrypt-ssl-certs-with-dovecot/2921
 167 #
 168 # for phone, k9mail, same thing but username alerts, pass in ivy-pass.
 169 # also, bk.b8.nz for secondary alerts, username is iank. same alerts pass.
 170 # fetching mail settings: folder poll frequency 10 minutes
 171 #######
 172
 173
 174 # * perstent password instructions
 175 # Note: for cert cron, we need to manually run first to accept known_hosts
 176
 177 # # exim passwords:
 178 # # for hosts which have all private files I just use the same user
 179 # # for other hosts, each one get\'s their own password.
 180 # # for generating secure pass, and storing for server too:
 181 # f=$(mktemp)
 182 # host=tp
 183 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$f
 184 # s sed -i "/^$host:/d" /p/c/filesystem/etc/exim4/passwd
 185 # echo "$host:$(mkpasswd -m sha-512 -s <$f)" >>/p/c/filesystem/etc/exim4/passwd
 186 # #reference: exim4_passwd_client(5)
 187 # dir=/p/c/machine_specific/$host/filesystem/etc/exim4
 188 # mkdir -p $dir
 189 # echo "mail.iankelling.org:$host:$(<$f)" > $dir/passwd.client
 190 # # then run this script
 191
 192 # # dovecot password, i just need 1 as I\'m the only user
 193 # mkdir /p/c/filesystem/etc/dovecot
 194 # echo "iank:$(doveadm pw -s SHA512-CRYPT)::::::" >>/p/c/filesystem/etc/dovecot/users
 195
 196 ####### end perstent password instructions ######
 197
 198
 199 # * dkim dns
 200 # # Remove 1 level of comments in this section, set the domain var
 201 # # for the domain you are setting up, then run this and copy dns settings
 202 # # into dns.
 203 # domain=iankelling.org
 204 # c /p/c/filesystem/etc/exim4
 205 # # this has several bugs addressed in comments, but it was helpful
 206 # # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
 207
 208 # openssl genrsa -out $domain-private.pem 2048
 209 # # Then, to get the public key strings to put in bind:
 210
 211 # # selector is needed for having multiple keys for one domain.
 212 # # I dun do that, so just use a static one: li
 213 # # Debadmin page does not have v=, fastmail does, and this
 214 # # says it\'s recommended in 3.6.1, default is DKIM1 anyways.
 215 # # https://www.ietf.org/rfc/rfc6376.txt
 216 # # Join and print all but first and last line.
 217 # # last line: swap hold & pattern, remove newlines, print.
 218 # # lines 2+: append to hold space
 219 # echo "bind txt record: remember to truncate $domain so its relative to the bind zone"
 220 # cat <<EOF
 221 # a._domainkey.$domain  TXT     (
 222 # "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')" )
 223 # EOF
 224 # # sed explanation: skip the first few lines, then put them into the hold space, then
 225 # # on the last line, back to the patern space, remove the newlines, then add a newline
 226 # # at the last char - 240, because bind txt records need strings <=255 chars,
 227 # # other dkim stuff at the begining is is 25 chars, and the pubkey is 393, so this
 228 # # leaves us a bit of extra room at the end and a bunch at the beginning.
 229
 230 # # selector was also put into /etc/exim4/conf.d/main/000_local,
 231
 232 # * dmarc dns
 233
 234 # # 2017-02 dmarc policies:
 235 # # host -t txt _dmarc.gmail.com
 236 # # yahoo: p=reject, hotmail: p=none, gmail: p=none, fastmail none for legacy reasons
 237 # # there were articles claiming gmail would be  changing
 238 # # to p=reject, in early 2017, which didn\'t happen. I see no sources on them. It\'s
 239 # # expected to cause problems
 240 # # with a few old mailing lists, copying theirs for now.
 241 #
 242 # echo "dmarc dns, name: _dmarc value: v=DMARC1; p=none; rua=mailto:mailauth-reports@$domain"
 243
 244 # * other dns
 245
 246 # # 2017-02 spf policies:
 247 # # host -t txt lists.fedoraproject.org
 248 # # google ~all, hotmail ~all, yahoo: ?all, fastmail ?all, outlook ~all
 249 # # i include fastmail\'s settings, per their instructions,
 250 # # and follow their policy. In mail in a box, or similar instructions,
 251 # # I\'ve seen recommended to not use a restrictive policy.
 252
 253 # # to check if dns has updated, you do
 254 # host -a mesmtp._domainkey.$domain
 255
 256 # # mx records,
 257 # # setting it to iankelling.org would work the same, but this
 258 # # is more flexible, I could change where mail.iankelling.org pointed.
 259 # cat <<'EOF'
 260 # mx records, 2 records each, for * and empty domain
 261 # pri 10 mail.iankelling.org
 262 # EOF
 263
 264 # # dnssec
 265 # from brc2, run dnsecgen then dsign, update named.local.conf, publish keys to registrar
 266
 267 # * functions & constants
 268
 269 pre="${0##*/}:"
 270 m() { printf "$pre %s\n"  "$*"; "$@"; }
 271 e() { printf "$pre %s\n"  "$*"; }
 272 err() { printf "$pre %s\n"  "$*" >&2; exit 1; }
 273
 274 reload=false
 275 # This file is so if we fail in the middle and rerun, we dont lose state
 276 if [[ -e /var/local/mail-setup-reload ]]; then
 277   reload=true
 278 fi
 279 i() { # install file
 280   local tmp tmpdir dest="$1"
 281   local base="${dest##*/}"
 282   mkdir -p ${dest%/*}
 283   ir=false # i result
 284   tmpdir=$(mktemp -d)
 285   cat >$tmpdir/"$base"
 286   tmp=$(rsync -ic $tmpdir/"$base" "$dest")
 287   if [[ $tmp ]]; then
 288     printf "%s\n" "$tmp"
 289     ir=true
 290     if [[ $dest == /etc/systemd/system/* ]]; then
 291       touch /var/local/mail-setup-reload
 292       reload=true
 293     fi
 294   fi
 295   rm -rf $tmpdir
 296 }
 297 setini() {
 298   key="$1" value="$2" section="$3"
 299   file="/etc/radicale/config"
 300   sed -ri "/ *\[$section\]/,/^ *\[[^]]+\]/{/^\s*${key}[[:space:]=]/d};/ *\[$section\]/a $key = $value" "$file"
 301 }
 302 soff () {
 303   for service; do
 304     # ignore services that dont exist
 305     if systemctl cat $service &>/dev/null; then
 306       m systemctl disable --now $service
 307     fi
 308   done
 309 }
 310 sre() {
 311   for service; do
 312     m systemctl restart $service
 313     m systemctl enable $service;
 314   done
 315 }
 316 mailhost() {
 317   [[ $HOSTNAME == "$MAIL_HOST" ]]
 318 }
 319 e() { printf "%s\n" "$*"; }
 320 reifactive() {
 321   for service; do
 322     if systemctl is-active $service >/dev/null; then
 323       m systemctl restart $service
 324     fi
 325   done
 326 }
 327 stopifactive() {
 328   for service; do
 329     if systemctl is-active $service >/dev/null; then
 330       m systemctl stop $service
 331     fi
 332   done
 333 }
 334
 335 mxhost=mx.iankelling.org
 336 mxport=587
 337 forward=$u@$mxhost
 338
 339 # old setup. left as comment for example
 340 # mxhost=mail.messagingengine.com
 341 # mxport=587
 342 # forward=ian@iankelling.org
 343
 344 smarthost="$mxhost::$mxport"
 345 uhome=$(eval echo ~$u)
 346
 347 # Somehow on one machine, a file got written with 664 perms.
 348 # just being defensive here.
 349 umask 0022
 350
 351 source /a/bin/bash_unpublished/source-state
 352 if [[ ! $MAIL_HOST ]]; then
 353   err "\$MAIL_HOST not set"
 354 fi
 355
 356 bhost_t=false
 357 case $HOSTNAME in
 358   $MAIL_HOST) : ;;
 359   kd|frodo|x2|x3|kw|sy|bo)
 360     bhost_t=true
 361     ;;
 362 esac
 363
 364
 365 # * Install universal packages
 366
 367
 368 # installs epanicclean iptables-exim ip6tables-exim
 369 /a/bin/ds/install-my-scripts
 370
 371 if [[ $(debian-codename-compat) == bionic ]]; then
 372   cat >/etc/apt/preferences.d/spamassassin <<'EOF'
 373 Package: spamassassin sa-compile spamc
 374 Pin: release n=focal,o=Ubuntu
 375 Pin-Priority: 500
 376 EOF
 377 fi
 378
 379 # light version of exim does not have sasl auth support.
 380 pi-nostart exim4 exim4-daemon-heavy spamassassin openvpn unbound clamav-daemon wireguard
 381
 382 # note: pyzor debian readme says you need to run some initialization command
 383 # but its outdated.
 384 pi spf-tools-perl p0f postgrey pyzor razor jq moreutils certbot fail2ban
 385 # bad packages that sometimes get automatically installed
 386 pu openresolv resolvconf
 387
 388 soff openvpn
 389
 390
 391 if [[ $(debian-codename) == etiona ]]; then
 392   # ip6tables stopped loading on boot. openvpn has reduced capability set,
 393   # so running iptables as part of openvpn startup wont work. This should do it.
 394   pi iptables-persistent
 395   cat >/etc/iptables/rules.v6 <<'EOF'
 396 *mangle
 397 COMMIT
 398 *nat
 399 COMMIT
 400 EOF
 401   # load it now.
 402   m ip6tables -S >/dev/null
 403 fi
 404
 405 # our nostart pi fails to avoid enabling
 406
 407
 408 # * Mail clean cronjob
 409
 410 i /etc/systemd/system/mailclean.timer <<'EOF'
 411 [Unit]
 412 Description=Run mailclean daily
 413
 414 [Timer]
 415 OnCalendar=monthly
 416
 417 [Install]
 418 WantedBy=timers.target
 419 EOF
 420
 421 i /etc/systemd/system/mailclean.service <<EOF
 422 [Unit]
 423 Description=Delete and archive old mail files
 424 After=multi-user.target
 425
 426 [Service]
 427 User=$u
 428 Type=oneshot
 429 ExecStart=/usr/local/bin/sysd-mail-once mailclean /a/bin/distro-setup/mailclean
 430 EOF
 431
 432 # * postgrey
 433
 434
 435 i /etc/default/postgrey <<'EOF'
 436 POSTGREY_OPTS="--exim --unix=/var/run/postgrey/postgrey.sock --retry-window=4 --max-age=60"
 437 EOF
 438
 439 # * clamav
 440
 441 m usermod -a -G Debian-exim clamav
 442
 443 i /etc/systemd/system/clamav-daemon.service.d/fix.conf <<EOF
 444 [Service]
 445 ExecStartPre=-/bin/mkdir /var/run/clamav
 446 ExecStartPre=/bin/chown clamav /var/run/clamav
 447 EOF
 448
 449 # * mail vpn config
 450
 451 # old.
 452 #vpnser=mailvpn.service
 453 # todo: this hangs if it cant resolv the endpoint. we
 454 # want it to just retry in the background.
 455 vpnser=wg-quick@wgmail.service
 456
 457 case $HOSTNAME in
 458   $MAIL_HOST)
 459     rsync -aiSAX --chown=root:root --chmod=g-s /p/c/filesystem/etc/wireguard/ /etc/wireguard
 460     bindpaths="/etc/127.0.0.1-resolv:/run/systemd/resolve /etc/basic-nsswitch:/etc/resolved-nsswitch:norbind"
 461     ;;&
 462   bk)
 463     bindpaths="/etc/10.173.8.1-resolv:/etc/127.0.0.1-resolv"
 464     ;;&
 465   *)
 466     d=/p/c/machine_specific/$HOSTNAME/filesystem/etc/wireguard/
 467     if [[ -d $d ]]; then
 468       rsync -aiSAX --chown=root:root --chmod=g-s $d  /etc/wireguard
 469     fi
 470     ;;
 471 esac
 472
 473 case $HOSTNAME in
 474   li) : ;;
 475   *)
 476     i /etc/systemd/system/wg-quick@wgmail.service.d/override.conf <<EOF
 477 [Unit]
 478 Requires=mailnn.service
 479 After=network.target mailnn.service
 480 JoinsNamespaceOf=mailnn.service
 481 BindsTo=mailnn.service
 482 StartLimitIntervalSec=0
 483
 484 [Service]
 485 PrivateNetwork=true
 486 # i dont think we need any of these, but it doesnt hurt to stay consistent
 487 BindPaths=$bindpaths
 488
 489 Restart=on-failure
 490 RestartSec=20
 491 EOF
 492     ;;
 493 esac
 494
 495
 496 # https://selivan.github.io/2017/12/30/systemd-serice-always-restart.html
 497 i /etc/systemd/system/mailvpn.service <<EOF
 498 [Unit]
 499 Description=OpenVPN tunnel for mail
 500 After=syslog.target network-online.target mailnn.service
 501 Wants=network-online.target
 502 Documentation=man:openvpn(8)
 503 Documentation=https://community.openvpn.net/openvpn/wiki/Openvpn24ManPage
 504 Documentation=https://community.openvpn.net/openvpn/wiki/HOWTO
 505 # needed to continually restatr
 506 JoinsNamespaceOf=mailnn.service
 507 BindsTo=mailnn.service
 508 StartLimitIntervalSec=0
 509
 510 [Service]
 511 Type=notify
 512 RuntimeDirectory=openvpn-client
 513 RuntimeDirectoryMode=0710
 514 WorkingDirectory=/etc/openvpn/client
 515 ExecStart=/usr/sbin/openvpn --suppress-timestamps --nobind --config /etc/openvpn/client/mail.conf
 516 #CapabilityBoundingSet=CAP_IPC_LOCK CAP_NET_ADMIN CAP_NET_RAW CAP_SETGID CAP_SETUID CAP_SYS_CHROOT CAP_DAC_OVERRIDE
 517 LimitNPROC=10
 518 # DeviceAllow=/dev/null rw
 519 # DeviceAllow=/dev/net/tun rw
 520 PrivateNetwork=true
 521 # in the network namespace, we cant connect to systemd-resolved on 127.0.0.53,
 522 # because of
 523 # https://unix.stackexchange.com/questions/445782/how-to-allow-systemd-resolved-to-listen-to-an-interface-other-than-loopback
 524 # there is a workaround there, but i dont think its really worth it,
 525 # the mail server is fine with a static dns anyways.
 526 # This thread is also interesting,
 527 # https://github.com/slingamn/namespaced-openvpn/issues/7
 528 # todo: the iptables rule at the bottom could be useful to prevent
 529 # dns from leaking in my network namespaced vpn.
 530 # I also like the idea of patching systemd-resolved so it
 531 # will listen on other interfaces, but its not worth my time.
 532 BindPaths=$bindpaths
 533 Restart=always
 534 # time to sleep before restarting a service
 535 RestartSec=20
 536
 537 [Install]
 538 WantedBy=multi-user.target
 539 EOF
 540
 541 i /etc/systemd/system/mailnnroute.service <<'EOF'
 542 [Unit]
 543 Description=Network routing for mailnn
 544 After=syslog.target network-online.target mailnn.service
 545 Wants=network-online.target
 546 JoinsNamespaceOf=mailnn.service
 547 BindsTo=mailnn.service
 548 StartLimitIntervalSec=0
 549
 550 [Service]
 551 Type=simple
 552 RemainAfterExit=true
 553 PrivateNetwork=true
 554 ExecStart=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns -n 10.173.8 start mail
 555 ExecStop=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns stop mail
 556 Restart=always
 557 RestartSec=20
 558
 559
 560 [Install]
 561 WantedBy=multi-user.target
 562 EOF
 563
 564 #
 565 i /etc/systemd/system/mailnn.service <<'EOF'
 566 [Unit]
 567 Description=Network Namespace for mail vpn service that will live forever and cant fail
 568 After=syslog.target network-online.target
 569 Wants=network-online.target
 570
 571 [Service]
 572 Type=simple
 573 PrivateNetwork=true
 574 ExecStart=/bin/sleep infinity
 575
 576 [Install]
 577 WantedBy=multi-user.target
 578 EOF
 579
 580 i /etc/systemd/system/mailbindwatchdog.service <<EOF
 581 [Unit]
 582 Description=Watchdog to restart services relying on systemd-resolved dir
 583 After=syslog.target network-online.target
 584 Wants=network-online.target
 585 BindsTo=mailnn.service
 586
 587 [Service]
 588 Type=simple
 589 ExecStart=/usr/local/bin/mailbindwatchdog $vpnser ${nn_progs[@]} unbound.service radicale.service
 590 Restart=always
 591 # time to sleep before restarting a service
 592 RestartSec=10
 593
 594 [Install]
 595 WantedBy=multi-user.target
 596 EOF
 597
 598
 599
 600 # old service name
 601 rm -fv /etc/systemd/system/openvpn-client-mail@.service
 602
 603 # We use a local unbound because systemd-resolved wont accept our
 604 # request, it will only listen to 127.0.0.53 in the main network
 605 # namespace, and rejected feature requests to change that (although I
 606 # could change the code and recompile), but anyways, that could answer
 607 # with things specific to the lan that aren't applicable in this
 608 # namespace, and since unbound is a recursive resolver, it means we just
 609 # use our own ip against dnsbl rate limits.
 610 #
 611 # If we ever notice this change, chattr +i on it
 612 # trust-ad is used in t10+, glibc 2.31
 613
 614 i /etc/127.0.0.1-resolv/stub-resolv.conf <<'EOF'
 615 nameserver 127.0.0.1
 616 options edns0 trust-ad
 617 EOF
 618
 619 i /etc/127.0.0.53-resolv/stub-resolv.conf <<'EOF'
 620 nameserver 127.0.0.53
 621 options edns0 trust-ad
 622 EOF
 623
 624
 625 i /etc/10.173.8.1-resolv/stub-resolv.conf <<'EOF'
 626 nameserver 10.173.8.1
 627 options edns0 trust-ad
 628 EOF
 629
 630 # this is just a bug fix for trisquel.
 631 f=/etc/apparmor.d/usr.sbin.unbound
 632 line="/usr/sbin/unbound flags=(attach_disconnected) {"
 633 if ! grep -qFx "$line" $f; then
 634   badline="/usr/sbin/unbound {"
 635   if ! grep -qFx "$badline" $f; then
 636     err expected line in $f not found
 637   fi
 638   sed -i "s,^$badline$,$line," $f
 639   if systemctl is-active apparmor &>/dev/null; then
 640     m systemctl reload apparmor
 641   fi
 642 fi
 643
 644 # note: anything added to nn_progs needs corresponding rm
 645 # down below in the host switch
 646 nn_progs=(exim4)
 647 if mailhost; then
 648   # Note dovecots lmtp doesnt need to be in the same nn to accept delivery.
 649   # Its in the nn so remote clients can connect to it.
 650   nn_progs+=(spamassassin dovecot)
 651 fi
 652
 653 case $HOSTNAME in
 654   $MAIL_HOST)
 655     i /etc/systemd/system/unbound.service.d/nn.conf <<EOF
 656 [Unit]
 657 After=mailnn.service
 658 JoinsNamespaceOf=mailnn.service
 659 BindsTo=mailnn.service
 660 StartLimitIntervalSec=0
 661
 662 [Service]
 663 PrivateNetwork=true
 664 # note the nsswitch bind is actually not needed for bk, but
 665 # its the same file so it does no harm.
 666 BindPaths=$bindpaths
 667
 668 Restart=always
 669 RestartSec=20
 670 EOF
 671
 672     # sooo, there are a few ways to get traffic from the mail network
 673     # namespace to go over the wghole.
 674     #
 675     #1: unify the mail vpn and wghole
 676     # into 1 network.  this seems simple and logical, so I'm doing it.
 677     # One general downside is tying things together, if I need to mess
 678     # with one thing, it breaks the other. Oh well for now.
 679     #
 680     # 2. We can route 10.5.3.0/24 out of the mail nn and nat it into wghole.
 681     #
 682     # 3. We can setup the routing to happen on li, which seemed like I
 683     # just needed to add 10.8.0.4/24 to AllowedIPs in at least the
 684     # wghole clients, but I think that is kind of hacky and breaks ipv4
 685     # routing within the mailvpn, it happened to work just because exim
 686     # prefers ipv6 and that was also available in the mailvpn.
 687     #
 688     # 4. Put the hole interface into the mail network namespace. This
 689     # doesn't work if the mail vpn is wg.  For openvpn, it bypasses the
 690     # vpn routing and establishes a direct connection.  I only use the
 691     # hole vpn for randomish things, it should be fine to join the mail
 692     # nn for that. There should be some way to fix the routing issue
 693     # by doing manual routing, but that doesn't seem like a good use of time.
 694     # relevant:
 695     # https://www.wireguard.com/netns/#
 696     #
 697     # for wireguard debugging
 698     # echo module wireguard +p > /sys/kernel/debug/dynamic_debug/control
 699     # dmesg -w
 700
 701     ;;&
 702   $MAIL_HOST|bk)
 703     for unit in ${nn_progs[@]}; do
 704       i /etc/systemd/system/$unit.service.d/nn.conf <<EOF
 705 [Unit]
 706 # commented for old openvpn
 707 Requires=$vpnser
 708 After=network.target mailnn.service $vpnser
 709 JoinsNamespaceOf=mailnn.service
 710 BindsTo=mailnn.service
 711 StartLimitIntervalSec=0
 712
 713 [Service]
 714 PrivateNetwork=true
 715 # note the nsswitch bind is actually not needed for bk, but
 716 # its the same file so it does no harm.
 717 BindPaths=$bindpaths
 718
 719 Restart=always
 720 RestartSec=20
 721 EOF
 722     done
 723     ;;
 724   *)
 725     for unit in exim4 spamassassin dovecot unbound; do
 726       f=/etc/systemd/system/$unit.service.d/nn.conf
 727       if [[ -s $f ]]; then
 728         rm -fv $f
 729         reload=true
 730       fi
 731     done
 732     ;;
 733 esac
 734
 735 # * spamassassin config
 736 i /etc/sysctl.d/80-iank-mail.conf <<'EOF'
 737 # see exim spec
 738 net.netfilter.nf_conntrack_tcp_timeout_close_wait = 120
 739 EOF
 740 if $ir; then
 741   m sysctl -p
 742 fi
 743
 744 i /etc/spamassassin/mylocal.cf <<'EOF'
 745 # this is mylocal.cf because the normal local.cf has a bunch of upstream stuff i dont want to mess with
 746
 747 # /usr/share/doc/exim4-base/README.Debian.gz:
 748 #   SpamAssassin's default report should not be used in a add_header
 749 #   statement since it contains empty lines. (This triggers e.g. Amavis'
 750 #   warning "BAD HEADER SECTION, Improper folded header field made up
 751 #   entirely of whitespace".) This is a safe, terse alternative:
 752 clear_report_template
 753 report (_SCORE_ / _REQD_ requ) _TESTSSCORES(,)_ autolearn=_AUTOLEARN
 754 uridnsbl_skip_domain iankelling.org
 755 uridnsbl_skip_domain amnimal.ninja
 756 uridnsbl_skip_domain expertpathologyreview.com
 757 uridnsbl_skip_domain zroe.org
 758 EOF
 759
 760 # 2020-10-19 remove old file. remove this when all hosts updated
 761 rm -fv /etc/systemd/system/spamddnsfix.{timer,service}
 762
 763 i /etc/default/spamassassin <<'EOF'
 764 # defaults plus debugging flags for an issue im having
 765 OPTIONS="--create-prefs --max-children 5 --helper-home-dir"
 766 PIDFILE="/var/run/spamd.pid"
 767 # my additions
 768 NICE="--nicelevel 15"
 769 CRON=1
 770 EOF
 771 #####   end spamassassin config
 772
 773
 774 # * Update mail cert
 775 if [[ -e /p/c/filesystem ]]; then
 776   # note, man openvpn implies we could just call mail-route on vpn startup/shutdown with
 777   # systemd, buuut it can remake the tun device unexpectedly, i got this in the log
 778   # after my internet was down for a bit:
 779   # NOTE: Pulled options changed on restart, will need to close and reopen TUN/TAP device.
 780   m /a/exe/vpn-mk-client-cert -b mailclient -n mail li.iankelling.org
 781 fi
 782 case $HOSTNAME in
 783   bk)
 784     if [[ ! -e /etc/openvpn/client/mail.conf ]]; then
 785       echo "$0: error: first, on a system with /p/c/filesystem, run mail-setup, or the vpn-mk-client-cert line above this err" 2>&2
 786       exit 1
 787     fi
 788     ;;
 789 esac
 790
 791 m rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/mail-cert-cron /usr/local/bin
 792
 793 i /etc/systemd/system/mailcert.service <<'EOF'
 794 [Unit]
 795 Description=Mail cert rsync
 796 After=multi-user.target
 797
 798 [Service]
 799 Type=oneshot
 800 ExecStart=/usr/local/bin/sysd-mail-once mailcert /usr/local/bin/mail-cert-cron
 801 EOF
 802 i /etc/systemd/system/mailcert.timer <<'EOF'
 803 [Unit]
 804 Description=Run mail-cert once a day
 805
 806 [Timer]
 807 OnCalendar=daily
 808
 809 [Install]
 810 WantedBy=timers.target
 811 EOF
 812
 813
 814 wghost=${HOSTNAME}wg.b8.nz
 815 if $bhost_t && [[ ! -e /etc/exim4/certs/$wghost/privkey.pem ]]; then
 816   certbot -n --manual-public-ip-logging-ok --eff-email --agree-tos -m letsencrypt@iankelling.org \
 817           certonly --manual --preferred-challenges=dns \
 818           --manual-auth-hook /a/bin/ds/le-dns-challenge \
 819           --manual-cleanup-hook /a/bin/ds/le-dns-challenge-cleanup \
 820           --deploy-hook /a/bin/ds/le-exim-deploy -d $wghost
 821 fi
 822
 823 # * fail2ban
 824
 825 # todo: test that these configs actually work, eg run
 826 # s iptables-exim -S
 827 # and see someone is banned.
 828
 829 sed 's/^ *before *= *iptables-common.conf/before = iptables-common-exim.conf/' \
 830     /etc/fail2ban/action.d/iptables-multiport.conf| i /etc/fail2ban/action.d/iptables-exim.conf
 831 i /etc/fail2ban/action.d/iptables-common-exim.conf <<'EOF'
 832 # iank: same as iptables-common, except iptables is iptables-exim, ip6tables is ip6tables-exim
 833
 834 # Fail2Ban configuration file
 835 #
 836 # Author: Daniel Black
 837 #
 838 # This is a included configuration file and includes the definitions for the iptables
 839 # used in all iptables based actions by default.
 840 #
 841 # The user can override the defaults in iptables-common.local
 842 #
 843 # Modified: Alexander Koeppe <format_c@online.de>, Serg G. Brester <serg.brester@sebres.de>
 844 #       made config file IPv6 capable (see new section Init?family=inet6)
 845
 846 [INCLUDES]
 847
 848 after = iptables-blocktype.local
 849         iptables-common.local
 850 # iptables-blocktype.local is obsolete
 851
 852 [Definition]
 853
 854 # Option:  actionflush
 855 # Notes.:  command executed once to flush IPS, by shutdown (resp. by stop of the jail or this action)
 856 # Values:  CMD
 857 #
 858 actionflush = <iptables> -F f2b-<name>
 859
 860
 861 [Init]
 862
 863 # Option:  chain
 864 # Notes    specifies the iptables chain to which the Fail2Ban rules should be
 865 #          added
 866 # Values:  STRING  Default: INPUT
 867 chain = INPUT
 868
 869 # Default name of the chain
 870 #
 871 name = default
 872
 873 # Option:  port
 874 # Notes.:  specifies port to monitor
 875 # Values:  [ NUM | STRING ]  Default:
 876 #
 877 port = ssh
 878
 879 # Option:  protocol
 880 # Notes.:  internally used by config reader for interpolations.
 881 # Values:  [ tcp | udp | icmp | all ] Default: tcp
 882 #
 883 protocol = tcp
 884
 885 # Option:  blocktype
 886 # Note:    This is what the action does with rules. This can be any jump target
 887 #          as per the iptables man page (section 8). Common values are DROP
 888 #          REJECT, REJECT --reject-with icmp-port-unreachable
 889 # Values:  STRING
 890 blocktype = REJECT --reject-with icmp-port-unreachable
 891
 892 # Option:  returntype
 893 # Note:    This is the default rule on "actionstart". This should be RETURN
 894 #          in all (blocking) actions, except REJECT in allowing actions.
 895 # Values:  STRING
 896 returntype = RETURN
 897
 898 # Option:  lockingopt
 899 # Notes.:  Option was introduced to iptables to prevent multiple instances from
 900 #          running concurrently and causing irratic behavior.  -w was introduced
 901 #          in iptables 1.4.20, so might be absent on older systems
 902 #          See https://github.com/fail2ban/fail2ban/issues/1122
 903 # Values:  STRING
 904 lockingopt = -w
 905
 906 # Option:  iptables
 907 # Notes.:  Actual command to be executed, including common to all calls options
 908 # Values:  STRING
 909 iptables = /usr/local/bin/iptables-exim <lockingopt>
 910
 911
 912 [Init?family=inet6]
 913
 914 # Option:  blocktype (ipv6)
 915 # Note:    This is what the action does with rules. This can be any jump target
 916 #          as per the iptables man page (section 8). Common values are DROP
 917 #          REJECT, REJECT --reject-with icmp6-port-unreachable
 918 # Values:  STRING
 919 blocktype = REJECT --reject-with icmp6-port-unreachable
 920
 921 # Option:  iptables (ipv6)
 922 # Notes.:  Actual command to be executed, including common to all calls options
 923 # Values:  STRING
 924 iptables = /usr/local/bin/ip6tables-exim <lockingopt>
 925 EOF
 926
 927 i /etc/fail2ban/jail.d/exim.local <<'EOF'
 928 [exim]
 929 enabled  = true
 930 port     = 25,587
 931 filter   = exim
 932 banaction = iptables-exim
 933 EOF
 934 if $ir; then
 935   m systemctl restart fail2ban
 936 fi
 937
 938 # * common exim4 config
 939
 940
 941 ## old, not using forward files anymore
 942 rm -fv $uhome/.forward /root/.forward
 943
 944
 945 # Make all system users be aliases. preventative
 946 # prevents things like cron mail for user without alias
 947 awk 'BEGIN { FS = ":" } ; $6 !~ /^\/home/ || $7 ~ /\/nologin$/  { print $1 }' /etc/passwd| while read -r user; do
 948   if [[ ! $user ]]; then
 949     continue
 950   fi
 951   if ! grep -q "^$user:" /etc/aliases; then
 952     echo "$user: root" |m tee -a /etc/aliases
 953   fi
 954 done
 955
 956
 957 awk 'BEGIN { FS = ":" } ; $6 ~ /^\/home/ && $7 !~ /\/nologin$/ { print $1 }' /etc/passwd| while read -r user; do
 958   case $HOSTNAME in
 959     $MAIL_HOST)
 960       sed -i "/^user:/d" /etc/aliases
 961       ;;
 962     *)
 963       if ! grep -q "^$user:" /etc/aliases; then
 964         echo "$user: root" |m tee -a /etc/aliases
 965       fi
 966       ;;
 967   esac
 968 done
 969
 970 if ! grep -q "^ncsoft:" /etc/aliases; then
 971   echo "ncsoft: graceq2323@gmail.com" |m tee -a /etc/aliases
 972 fi
 973
 974
 975
 976 m gpasswd -a iank adm #needed for reading logs
 977
 978 ### make local bounces go to normal maildir
 979 # local mail that bounces goes to /Maildir or /root/Maildir
 980 dirs=(/m/md/bounces/{cur,tmp,new})
 981 m mkdir -p ${dirs[@]}
 982 m chown iank:iank /m /m/md
 983 m ln -sfT /m/md /m/iank
 984 m chmod 771 /m /m/md
 985 m chown -R $u:Debian-exim /m/md/bounces
 986 m chmod 775 ${dirs[@]}
 987 m usermod -a -G Debian-exim $u
 988 for d in /Maildir /root/Maildir; do
 989   if [[ ! -L $d ]]; then
 990     m rm -rf $d
 991   fi
 992   m ln -sf -T /m/md/bounces $d
 993 done
 994
 995 # dkim, client passwd file
 996 files=(/p/c/machine_specific/$HOSTNAME/filesystem/etc/exim4/*)
 997 f=/p/c/filesystem/etc/exim4/passwd.client
 998 if [[ -e $f ]]; then
 999   files+=($f)
1000 fi
1001 if (( ${#files[@]} )); then
1002   m rsync -ahhi --chown=root:Debian-exim --chmod=0640 \
1003     ${files[@]} /etc/exim4
1004 fi
1005
1006 # by default, only 10 days of logs are kept. increase that.
1007 m sed -ri 's/^(\s*rotate\s).*/\11000/' /etc/logrotate.d/exim4-base
1008
1009
1010 ## disabled. not using .forward files, but this is still interesting
1011 ## for reference.
1012 # ## https://blog.dhampir.no/content/make-exim4-on-debian-respect-forward-and-etcaliases-when-using-a-smarthost
1013 # # i only need .forwards, so just doing that one.
1014 # cd /etc/exim4/conf.d/router
1015 # b=userforward_higher_priority
1016 # # replace the router name so it is unique
1017 # sed -r s/^\\S+:/$b:/ 600_exim4-config_userforward >175_$b
1018
1019 # todo, consider 'separate' in etc/exim4.conf, could it help on busy systems?
1020
1021 # alerts is basically the postmaster address
1022 m sed -i --follow-symlinks -f - /etc/aliases <<EOF
1023 \$a root: alerts@iankelling.org
1024 /^root:/d
1025 EOF
1026
1027 cat >/etc/exim4/conf.d/rewrite/34_iank_rewriting <<'EOF'
1028 ncsoft@zroe.org graceq2323@gmail.com hE
1029 EOF
1030
1031 # old name
1032 rm -fv /etc/exim4/conf.d/retry/37_retry
1033
1034 cat >/etc/exim4/conf.d/retry/17_retry <<'EOF'
1035 # Retry fast for my own domains
1036 iankelling.org * F,1d,10m;F,14d,1h
1037 amnimal.ninja * F,1d,10m;F,14d,1h
1038 expertpathologyreview.com * F,1d,10m;F,14d,1h
1039 je.b8.nz * F,1d,10m;F,14d,1h
1040 zroe.org * F,1d,10m;F,14d,1h
1041 eximbackup.b8.nz * F,1d,4m;F,14d,1h
1042 EOF
1043
1044
1045 rm -vf /etc/exim4/conf.d/main/000_localmacros # old filename
1046 cat >/etc/exim4/conf.d/main/000_local <<EOF
1047 MAIN_TLS_ENABLE = true
1048
1049 # require tls connections for all smarthosts
1050 REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS = *
1051
1052 # debian exim config added this in 2016 or so?
1053 # it's part of the smtp spec, to limit lines to 998 chars
1054 # but a fair amount of legit mail does not adhere to it. I don't think
1055 # this should be default, like it says in
1056 # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=828801
1057 # todo: the bug for introducing this was about headers, but
1058 # the fix maybe is for all lines? one says gmail rejects, the
1059 # other says gmail does not reject. figure out and open a new bug.
1060 IGNORE_SMTP_LINE_LENGTH_LIMIT = true
1061
1062 # more verbose logs
1063 MAIN_LOG_SELECTOR = +all
1064
1065 # Based on spec, seems like a good idea to be nice.
1066 smtp_return_error_details = true
1067
1068 # normally empty, I set this so I can set the envelope address
1069 # when doing mail redelivery to invoke filters. Also allows
1070 # me exiqgrep and stuff.
1071 MAIN_TRUSTED_GROUPS = $u
1072
1073 # default is 10. when exim has been down for a bit, fsf mailserver
1074 # will do a big send in one connection, then exim decides to put
1075 # the messages in the queue instead of delivering them, to avoid
1076 # spawning too many delivery processes. This is the same as the
1077 # fsfs value. And the corresponding one for how many messages
1078 # to send out in 1 connection remote_max_parallel = 256
1079 smtp_accept_queue_per_connection = 500
1080
1081
1082 DKIM_CANON = relaxed
1083 DKIM_SELECTOR = li
1084
1085 # from comments in
1086 # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
1087 # and its best for this to align https://tools.ietf.org/html/rfc7489#page-8
1088 # There could be some circumstance when the
1089 # from: isnt our domain, but the envelope sender is
1090 # and so still want to sign, but I cant think of any case.
1091 DKIM_DOMAIN = \${lc:\${domain:\$rh_from:}}
1092 # The file is based on the outgoing domain-name in the from-header.
1093 # sign if key exists
1094 DKIM_PRIVATE_KEY = \${if exists{/etc/exim4/\${dkim_domain}-private.pem} {/etc/exim4/\${dkim_domain}-private.pem}}
1095
1096 # most of the ones that gmail seems to use.
1097 # Exim has horrible default of signing unincluded
1098 # list- headers since they got mentioned in an
1099 # rfc, but this messes up mailing lists, like gnu/debian which want to
1100 # keep your dkim signature intact but add list- headers.
1101 DKIM_SIGN_HEADERS = mime-version:in-reply-to:references:from:date:subject:to
1102
1103 domainlist local_hostnames = ! je.b8.nz : ! bk.b8.nz : *.b8.nz : b8.nz
1104
1105 hostlist iank_trusted = <; \\
1106 # veth0
1107 10.173.8.1 ; \\
1108 # li li_ip6
1109 72.14.176.105 ; 2600:3c00::f03c:91ff:fe6d:baf8 ; \\
1110 # li_vpn_net li_vpn_net_ip6s
1111 10.8.0.0/24; 2600:3c00:e000:280::/64 ; 2600:3c00:e002:3800::/56 ;  \\
1112 # bk bk_ip6
1113 85.119.83.50 ; 2001:ba8:1f1:f0c9::2 ; \\
1114 # je je_ipv6
1115 85.119.82.128 ; 2001:ba8:1f1:f09d::2 ; \\
1116 # fsf_mit_net fsf_mit_net_ip6 fsf_net fsf_net_ip6 fsf_office_net
1117 18.4.89.0/24 ; 2603:3005:71a:2e00::/64 ; 209.51.188.0/24 ; 2001:470:142::/48 ; 74.94.156.208/28
1118 EOF
1119
1120 rm -fv /etc/exim4/rcpt_local_acl # old path
1121
1122 i /etc/exim4/conf.d/local_deny_exceptions_acl <<'EOF'
1123 # This acl already exists in rcpt, this just makes it more widespread.
1124 # See the comment there for its rationale. The reason it needs to be
1125 # more widespread is that I've turned on sender verification, but cron
1126 # emails can fail sender verification since I may be in a network that
1127 # doesn't have my local dns.
1128 accept
1129   authenticated = *
1130
1131 # i setup a local programs smtp to mail.iankelling.org, this
1132 # skips sender verification for it.
1133 accept
1134   hosts = 10.173.8.1
1135 EOF
1136
1137 rm -fv /etc/exim4/data_local_acl # old path
1138 i /etc/exim4/conf.d/data_local_acl <<'EOF'
1139 # Except for the "condition =", this was
1140 # a comment in the check_data acl. The comment about this not
1141 # being suitable has been changed in newer exim versions. The only thing
1142 # related I found was to
1143 # add the condition =, cuz spamassassin has problems with big
1144 # messages and spammers don't bother with big messages,
1145 # but I've increased the size from 10k
1146 # suggested in official docs, and 100k in the wiki example because
1147 # those docs are rather old and I see a 110k spam message
1148 # pretty quickly looking through my spam folder.
1149
1150 warn
1151   !hosts = +iank_trusted
1152   remove_header = X-Spam_score: X-Spam_score_int : X-Spam_bar : X-Spam_report
1153
1154 warn
1155   !hosts = +iank_trusted
1156   condition = ${if < {$message_size}{5000K}}
1157   spam = Debian-exim:true
1158   add_header = X-Spam_score_int: $spam_score_int
1159   add_header = X-Spam_score: $spam_score
1160   add_header = X-Spam_bar: $spam_bar
1161   add_header = X-Spam_report: $spam_report
1162   add_header = X-Spam_action: $spam_action
1163
1164 warn
1165   condition = ${if def:malware_name}
1166   remove_header = Subject:
1167   add_header = Subject: [Clamav warning: $malware_name] $h_subject
1168   log_message = heuristic malware warning: $malware_name
1169
1170 #accept
1171 #  spf = pass:fail:softfail:none:neutral:permerror:temperror
1172 #  dmarc_status = reject:quarantine
1173 #  add_header = Reply-to: dmarctest@iankelling.org
1174
1175 EOF
1176
1177 i /etc/exim4/conf.d/router/900_exim4-config_local_user <<EOF
1178 ### router/900_exim4-config_local_user
1179 #################################
1180
1181 # This router matches local user mailboxes. If the router fails, the error
1182 # message is "Unknown user".
1183 local_user:
1184   debug_print = "R: local_user for \$local_part@\$domain"
1185   driver = accept
1186   domains = +local_domains
1187 # ian: default file except where mentioned.
1188 # ian: commented this. I get all local parts. for bk, an rcpt
1189 # check handles checking with dovecot, and the only router
1190 # after this is root.
1191 #  local_parts = ! root
1192   transport = LOCAL_DELIVERY
1193   cannot_route_message = Unknown user
1194 # ian: added for + addressing.
1195   local_part_suffix = +*
1196   local_part_suffix_optional
1197 EOF
1198 i /etc/exim4/conf.d/transport/30_exim4-config_dovecot_lmtp <<'EOF'
1199 dovecot_lmtp:
1200   driver = lmtp
1201   socket = /var/run/dovecot/lmtp
1202   #maximum number of deliveries per batch, default 1
1203   batch_max = 200
1204   envelope_to_add
1205 EOF
1206
1207 i /etc/exim4/conf.d/transport/30_remote_smtp_vpn <<'EOF'
1208 # same as debians 30_exim4-config_remote_smtp, but
1209 # with interface added at the end.
1210
1211 remote_smtp_vpn:
1212   debug_print = "T: remote_smtp_vpn for $local_part@$domain"
1213   driver = smtp
1214 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
1215   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
1216 .endif
1217 .ifdef REMOTE_SMTP_HOSTS_AVOID_TLS
1218   hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
1219 .endif
1220 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1221   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1222 .endif
1223 .ifdef REMOTE_SMTP_RETURN_PATH
1224   return_path = REMOTE_SMTP_RETURN_PATH
1225 .endif
1226 .ifdef REMOTE_SMTP_HELO_DATA
1227   helo_data=REMOTE_SMTP_HELO_DATA
1228 .endif
1229 .ifdef DKIM_DOMAIN
1230 dkim_domain = DKIM_DOMAIN
1231 .endif
1232 .ifdef DKIM_SELECTOR
1233 dkim_selector = DKIM_SELECTOR
1234 .endif
1235 .ifdef DKIM_PRIVATE_KEY
1236 dkim_private_key = DKIM_PRIVATE_KEY
1237 .endif
1238 .ifdef DKIM_CANON
1239 dkim_canon = DKIM_CANON
1240 .endif
1241 .ifdef DKIM_STRICT
1242 dkim_strict = DKIM_STRICT
1243 .endif
1244 .ifdef DKIM_SIGN_HEADERS
1245 dkim_sign_headers = DKIM_SIGN_HEADERS
1246 .endif
1247 .ifdef TLS_DH_MIN_BITS
1248 tls_dh_min_bits = TLS_DH_MIN_BITS
1249 .endif
1250 .ifdef REMOTE_SMTP_TLS_CERTIFICATE
1251 tls_certificate = REMOTE_SMTP_TLS_CERTIFICATE
1252 .endif
1253 .ifdef REMOTE_SMTP_PRIVATEKEY
1254 tls_privatekey = REMOTE_SMTP_PRIVATEKEY
1255 .endif
1256 .ifdef REMOTE_SMTP_HOSTS_REQUIRE_TLS
1257   hosts_require_tls = REMOTE_SMTP_HOSTS_REQUIRE_TLS
1258 .endif
1259 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1260   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1261 .endif
1262   interface = <; 10.8.0.4 ; 2600:3c00:e002:3800::4
1263 EOF
1264
1265 i /etc/exim4/conf.d/transport/30_smarthost_dkim <<'EOF'
1266 # ian: this is remote_smtp_smarthost plus the dkim parts from remote_smtp
1267
1268 smarthost_dkim:
1269   debug_print = "T: remote_smtp_smarthost for $local_part@$domain"
1270   driver = smtp
1271   multi_domain
1272 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
1273   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
1274 .endif
1275   hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \
1276         {\
1277         ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\
1278         }\
1279         {} \
1280       }
1281 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1282   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1283 .endif
1284 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1285   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1286 .endif
1287 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1288   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1289 .endif
1290 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1291   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
1292 .endif
1293 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1294   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1295 .endif
1296 .ifdef REMOTE_SMTP_RETURN_PATH
1297   return_path = REMOTE_SMTP_RETURN_PATH
1298 .endif
1299 .ifdef REMOTE_SMTP_HELO_DATA
1300   helo_data=REMOTE_SMTP_HELO_DATA
1301 .endif
1302 .ifdef TLS_DH_MIN_BITS
1303 tls_dh_min_bits = TLS_DH_MIN_BITS
1304 .endif
1305 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1306 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1307 .endif
1308 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1309 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1310 .endif
1311 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1312   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1313 .endif
1314 .ifdef DKIM_DOMAIN
1315 dkim_domain = DKIM_DOMAIN
1316 .endif
1317 .ifdef DKIM_SELECTOR
1318 dkim_selector = DKIM_SELECTOR
1319 .endif
1320 .ifdef DKIM_PRIVATE_KEY
1321 dkim_private_key = DKIM_PRIVATE_KEY
1322 .endif
1323 .ifdef DKIM_CANON
1324 dkim_canon = DKIM_CANON
1325 .endif
1326 .ifdef DKIM_STRICT
1327 dkim_strict = DKIM_STRICT
1328 .endif
1329 .ifdef DKIM_SIGN_HEADERS
1330 dkim_sign_headers = DKIM_SIGN_HEADERS
1331 .endif
1332 EOF
1333
1334
1335 cat >/etc/exim4/update-exim4.conf.conf  <<'EOF'
1336 # default stuff, i havent checked if its needed
1337 dc_minimaldns='false'
1338 dc_relay_nets=''
1339 CFILEMODE='644'
1340 dc_use_split_config='true'
1341 dc_mailname_in_oh='true'
1342 EOF
1343
1344
1345 # * radicale
1346 if mailhost; then
1347   if ! mountpoint /o; then
1348     echo "error /o is not a mountpoint" >&2
1349     exit 1
1350   fi
1351
1352   # davx/davdroid setup instructions at the bottom
1353
1354   # main docs:
1355   # http://radicale.org/user_documentation/
1356   # https://davdroid.bitfire.at/configuration/
1357
1358   # note on debugging: if radicale can't bind to the address,
1359   # in the log it just says "Starting Radicale". If you run
1360   # it in the foreground, it will give more info. Background
1361   # plus debug does not help.
1362   # sudo -u radicale radicale -D -f
1363
1364   # created password file with:
1365   # htpasswd -c /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1366   # chmod 640 /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1367   # # setup chgrp www-data in ./conflink
1368
1369   pi-nostart radicale
1370
1371   i /etc/systemd/system/radicale.service.d/override.conf <<EOF
1372 [Unit]
1373 # this unit is configured to start and stop whenever
1374 # $vpnser does
1375
1376 After=network.target network-online.target mailnn.service $vpnser
1377 BindsTo=$vpnser
1378
1379 Wants=network-online.target
1380 JoinsNamespaceOf=mailnn.service
1381 StartLimitIntervalSec=0
1382
1383 [Service]
1384 PrivateNetwork=true
1385 BindPaths=$bindpaths
1386 Restart=always
1387 # time to sleep before restarting a service
1388 RestartSec=20
1389
1390 [Install]
1391 # for openvpn
1392 RequiredBy=$vpnser
1393 EOF
1394
1395
1396   # use persistent uid/gid
1397   IFS=:; read -r _ _ uid _ < <(getent passwd radicale ); unset IFS
1398   IFS=:; read -r _ _ gid _ < <(getent group radicale ); unset IFS
1399   if [[ $uid != 609 ]]; then
1400     m systemctl stop radicale ||:
1401     m usermod -u 609 radicale
1402     m groupmod -g 609 radicale
1403     m usermod -g 609 radicale
1404   fi
1405   m find /o/radicale  -xdev -exec chown -h 609 {} +
1406   m find /o/radicale -xdev -exec chgrp -h 609 {} +
1407
1408
1409   # I moved /var/lib/radicale after it's initialization.
1410   # I did a sudo -u radicale git init in the collections subfolder
1411   # after it gets created, per the git docs.
1412   m /a/exe/lnf -T /o/radicale /var/lib/radicale
1413
1414   # from https://www.williamjbowman.com/blog/2015/07/24/setting-up-webdav-caldav-and-carddav-servers/
1415
1416   # more config is for li in distro-end
1417
1418   # coment in this file says this is needed for it to run on startup
1419   sed -ri 's/^\s*#+\s*(ENABLE_RADICALE\s*=\s*yes\s*)/\1/' /etc/default/radicale
1420
1421   # comments say default is 0.0.0.0:5232
1422   m setini hosts 10.8.0.4:5232 server
1423   # https://radicale.org/2.1.html
1424   m setini type http_x_remote_user auth
1425
1426
1427   # disable power management feature, set to 240 min sync interval,
1428   # so it shouldn't be bad.
1429
1430   # davdroid from f-druid.
1431   # login with url and user name
1432   # url https://cal.iankelling.org/ian
1433   # username ian
1434   # pass, see password manager for radicale
1435   #
1436   # add account dialog:
1437   #
1438   # set account name as ian@iankelling.org, per help text below the
1439   # field.
1440   #
1441   # switch to groups are per-contact categories,
1442   # per https://davdroid.bitfire.at/configuration/radicale/
1443   #
1444   #
1445   # After setting up account, I added one address book, named
1446   # ianaddr. calender was already created, named ian. checked boxes under
1447   # both. synced.
1448   #
1449   # To restore from old phone to new phone, I wiped all data out, then copied over the newly created files. I think
1450   #
1451   # ignorable background info:
1452   #
1453   # opentasks uses the calendar file.
1454   #
1455   # The address book I created got a uuid as a name for the file. Note
1456   # the .props file says if it's a calendar or addressbook.
1457   #
1458   # When debugging, tailed /var/log/radicale/radicale.log and apache log,
1459   # both show the requests happening. Without creating the address book,
1460   # after creating a contact, a sync would delete it.
1461   #
1462   # Address books correspond to .props files in the radicale dir.
1463   #
1464   #  Some background is here,
1465   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1466   # which shows separate vcard option is from rfc 6350, the other is 2426,
1467   # radicale page says it implements the former not the latter,
1468   # which conflicts with the documentation of which to select, but whatever.
1469   # http://radicale.org/technical_choices/
1470   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1471   #
1472   # Note, url above says only cayanogenmod 13+ and omnirom can manage groups.
1473
1474   # Note, radicale had built-in git support to track changes, but they
1475   # removed it in 2.0.
1476
1477 fi
1478
1479 # * dovecot
1480
1481 # ** $MAIL_HOST|bk|je)
1482 case $HOSTNAME in
1483   $MAIL_HOST|bk|je)
1484     # based on a little google and package search, just the dovecot
1485     # packages we need instead of dovecot-common.
1486     #
1487     # dovecot-lmtpd is for exim to deliver to dovecot instead of maildir
1488     # directly.  The reason to do this is to use dovecot\'s sieve, which
1489     # can generally do more than exims filters (a few things less) and
1490     # sieve has the benefit of being supported in postfix and
1491     # proprietary/weird environments, so there is more examples on the
1492     # internet.
1493     pi dovecot-core dovecot-imapd dovecot-sieve dovecot-lmtpd dovecot-sqlite sqlite3
1494
1495     for f in /p/c{/machine_specific/$HOSTNAME,}/filesystem/etc/dovecot/users; do
1496       if [[ -e $f ]]; then
1497         m rsync -ahhi --chown=root:dovecot --chmod=0640 $f /etc/dovecot/
1498         break
1499       fi
1500     done
1501     for f in /p/c/subdir_files/sieve/*sieve /a/bin/ds/subdir_files/sieve/*sieve; do
1502       m sudo -u $u /a/exe/lnf -v -T $f $uhome/sieve/${f##*/}
1503     done
1504
1505     # https://wiki.dovecot.org/SSL/DovecotConfiguration
1506     i /etc/dovecot/dhparam <<'EOF'
1507 -----BEGIN DH PARAMETERS-----
1508 MIIBCAKCAQEAoleil6SBxGqQKk7j0y2vV3Oklv6XupZKn7PkPv485QuFeFagifeS
1509 A+Jz6Wquqk5zhGyCu63Hp4wzGs4TyQqoLjkaWL6Ra/Bw3g3ofPEzMGEsV1Qdqde4
1510 jorwiwtr2i9E6TXQp0noT/7VFeHulIkayTeW8JulINdMHs+oLylv16McGCIrxbkM
1511 8D1PuO0TP/CNDs2QbRvJ1RjY3CeGpxMhrSHVgBCUMwnA2cvz3bYjI7UMYMMDPNrE
1512 PLrwsYzXGGCdJsO2vsmmqqgLsZiapYJlUNjfiyWLt7E2H6WzkNB3VIhIPfLqFDPK
1513 xioE3sYKdjOt+p6mlg3l8+OLtODEFPHDqwIBAg==
1514 -----END DH PARAMETERS-----
1515 EOF
1516     {
1517       if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
1518         cat <<'EOF'
1519 ssl_cert = </etc/exim4/fullchain.pem
1520 ssl_key = </etc/exim4/privkey.pem
1521 EOF
1522       else
1523         cat <<'EOF'
1524 ssl_cert = </etc/exim4/exim.crt
1525 ssl_key = </etc/exim4/exim.key
1526 EOF
1527       fi
1528       cat <<EOF
1529 # https://ssl-config.mozilla.org
1530 ssl = required
1531 # this is the same as the certbot list, in my cert cronjob, I check if that has changed upstream.
1532 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
1533 ssl_protocols = TLSv1.2
1534 ssl_prefer_server_ciphers = no
1535
1536 protocol lmtp {
1537 #per https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
1538 # default is just \$mail_plugins
1539   mail_plugins = \$mail_plugins sieve
1540 }
1541 EOF
1542       if dpkg --compare-versions $(dpkg-query -f='${Version}\n' --show dovecot-core) ge 1:2.3; then
1543         cat <<EOF
1544 ssl_dh = </etc/dovecot/dhparam
1545 EOF
1546       fi
1547     } >/etc/dovecot/local.conf
1548
1549     ;;&
1550
1551   # **  $MAIL_HOST)
1552   $MAIL_HOST)
1553     # If we changed 90-sieve.conf and removed the active part of the
1554     # sieve option, we wouldn\'t need this, but I\'d rather not modify a
1555     # default config if not needed. This won\'t work as a symlink in /a/c
1556     # unfortunately.
1557     m sudo -u $u /a/exe/lnf -T sieve/main.sieve $uhome/.dovecot.sieve
1558
1559     if [[ ! -e $uhome/sieve/personal.sieve ]]; then
1560       m touch $uhome/sieve/personal{,end}{,test}.sieve
1561     fi
1562
1563     rm -fv /etc/dovecot/conf.d/20-lmtp.conf # file from prev version
1564     cat >>/etc/dovecot/local.conf <<EOF
1565 # simple password file based login
1566 !include conf.d/auth-passwdfile.conf.ext
1567
1568 # ian: %u is used for alerts user vs iank
1569 mail_location = maildir:/m/%u:LAYOUT=fs:INBOX=/m/%u/INBOX
1570 mail_uid = $u
1571 mail_gid = $u
1572
1573 protocol lmtp {
1574 # For a normal setup with exim, we need something like this, which
1575 # removes the domain part
1576 #  auth_username_format = %Ln
1577 #
1578 #  or else # Exim says something like
1579 #  "LMTP error after RCPT ... 550 ... User doesn't exist someuser@somedomain"
1580 # Dovecot verbose log says something like
1581 # "auth-worker(9048): passwd(someuser@somedomain): unknown user"
1582 # reference: http://wiki.dovecot.org/LMTP/Exim
1583 #
1584 # However, I use this to direct all mail to the same inbox.
1585 # A normal way to do this, which I did at first is to have
1586 # a router in exim almost at the end, eg 950,
1587 #local_catchall:
1588 #  debug_print = "R: catchall for \$local_part@\$domain"
1589 #  driver = redirect
1590 #  domains = +local_domains
1591 #  data = $u
1592 # based on
1593 # http://blog.alteholz.eu/2015/04/exim4-and-catchall-email-address/
1594 # with superflous options removed.
1595 # However, this causes the envelope to be rewritten,
1596 # which makes filtering into mailboxes a little less robust or more complicated,
1597 # so I've done it this way instead. it also requires
1598 # modifying the local router in exim.
1599   auth_username_format = $u
1600 }
1601 EOF
1602     ;;&
1603   # **  bk|je)
1604   bk|je)
1605     chown -R mail.mail /m/md
1606
1607     f=/etc/dovecot/conf.d/10-auth.conf
1608     if [[ -e $f ]]; then
1609       mv $f $f-iank-disabled
1610     fi
1611
1612     cat >>/etc/dovecot/local.conf <<EOF
1613 !include /etc/dovecot/local.conf.ext
1614
1615 # for debugging info, uncomment these.
1616 # logs go to syslog and to /var/log/mail.log
1617 #auth_verbose=yes
1618 #mail_debug=yes
1619
1620
1621 protocol lmtp {
1622 # This downcases the localpart. default is case sensitive.
1623 # case sensitive local part will miss out on valid email when some person or system
1624 # mistakenly capitalizes things.
1625   auth_username_format = %Lu
1626 }
1627
1628 # make 147 only listen on localhost, plan to use for nextcloud.
1629 # copied from mailinabox
1630 service imap-login {
1631   inet_listener imap {
1632     address = 127.0.0.1
1633   }
1634 }
1635 # https://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_dovecot_authenticator.html
1636 service auth {
1637   unix_listener auth-client {
1638     user = Debian-exim
1639     group = Debian-exim
1640   }
1641 }
1642
1643
1644 plugin {
1645   sieve_before = /etc/dovecot/sieve-spam.sieve
1646   # from mailinabox
1647   sieve = /m/sieve/%d/%n.sieve
1648   sieve_dir = /m/sieve/%d/%n
1649 }
1650
1651
1652 # all taken from mailinabox.
1653 mail_location = maildir:/m/md/%d/%n
1654 # meh, ok.
1655 mail_privileged_group = mail
1656 # By default Dovecot allows users to log in only with UID numbers 500 and above. mail is 8
1657 first_valid_uid = 1
1658
1659 # todo: test these changes in the universal config
1660 # mailboxes taken from mailinabox but removed
1661 # settings duplicate to defaults
1662 namespace inbox {
1663   mailbox INBOX {
1664     auto = subscribe
1665   }
1666   mailbox Spam {
1667     special_use = \Junk
1668     auto = subscribe
1669   }
1670   mailbox Drafts {
1671     auto = subscribe
1672   }
1673   mailbox Sent {
1674     auto = subscribe
1675   }
1676   mailbox Trash {
1677     auto = subscribe
1678   }
1679   mailbox Archive {
1680     special_use = \Archive
1681     auto = subscribe
1682   }
1683 }
1684 auth_mechanisms = plain login
1685 EOF
1686
1687     i /etc/dovecot/sieve-spam.sieve <<'EOF'
1688 require ["regex", "fileinto", "imap4flags"];
1689
1690 if allof (header :regex "X-Spam-Status" "^Yes") {
1691   fileinto "Spam";
1692   stop;
1693 }
1694 EOF
1695
1696     i /etc/dovecot/local.conf.ext <<'EOF'
1697 passdb {
1698   driver = sql
1699   args = /etc/dovecot/dovecot-sql.conf.ext
1700 }
1701 userdb {
1702   driver = sql
1703   args = /etc/dovecot/dovecot-sql.conf.ext
1704 }
1705
1706 EOF
1707
1708     i /etc/dovecot/dovecot-sql.conf.ext <<'EOF'
1709 # from mailinabox
1710 driver = sqlite
1711 connect = /m/rc/users.sqlite
1712 default_pass_scheme = SHA512-CRYPT
1713 password_query = SELECT email as user, password FROM users WHERE email='%u';
1714 user_query = SELECT email AS user, "mail" as uid, "mail" as gid, "/m/md/%d/%n" as home FROM users WHERE email='%u';
1715 iterate_query = SELECT email AS user FROM users;
1716 EOF
1717     m chmod 0600 /etc/dovecot/dovecot-sql.conf.ext # per Dovecot instructions
1718
1719     # db needs to be in a www-data writable directory
1720     db=/m/rc/users.sqlite
1721     if [[ ! -s $db ]]; then
1722       m mkdir -p /m/rc
1723       m sqlite3 $db <<'EOF'
1724 CREATE TABLE users (
1725 id INTEGER PRIMARY KEY AUTOINCREMENT,
1726 email TEXT NOT NULL UNIQUE,
1727 password TEXT NOT NULL,
1728 extra,
1729 privileges TEXT NOT NULL DEFAULT '');
1730 EOF
1731     fi
1732     # example of adding a user:
1733     # hash: doveadm pw -s SHA512-CRYPT -p passhere
1734     # sqlite3 /m/rc/users.sqlite <<'EOF'
1735     #insert into users (email, password) values ('testignore@bk.b8.nz', 'hash');
1736     #EOF
1737     # update users set password = 'hash' where email = 'testignore@bk.b8.nz';
1738
1739     # this should be at the end since it requires a valid dovecot config
1740     m sievec /etc/dovecot/sieve-spam.sieve
1741     ;;&
1742   # **  bk)
1743   bk)
1744     # roundcube uses this
1745     mkdir -p /m/sieve
1746     chown mail.mail /m/sieve
1747     m pi dovecot-managesieved
1748     ;;
1749 esac
1750
1751 # * thunderbird autoconfig setup
1752
1753 bkdomains=(expertpathologyreview.com amnimal.ninja)
1754 if [[ $HOSTNAME == bk ]]; then
1755   for domain in ${bkdomains[@]}; do
1756     m /a/exe/web-conf apache2 autoconfig.$domain
1757     dir=/var/www/autoconfig.$domain/html/mail
1758     m mkdir -p $dir
1759     # taken from mailinabox
1760     i $dir/config-v1.1.xml <<EOF
1761 <?xml version="1.0" encoding="UTF-8"?>
1762 <clientConfig version="1.1">
1763     <emailProvider id="$domain">
1764       <domain>$domain</domain>
1765
1766       <displayName>$domain Mail</displayName>
1767       <displayShortName>$domain</displayShortName>
1768
1769       <incomingServer type="imap">
1770          <hostname>mail2.iankelling.org</hostname>
1771          <port>993</port>
1772          <socketType>SSL</socketType>
1773          <username>%EMAILADDRESS%</username>
1774          <authentication>password-cleartext</authentication>
1775       </incomingServer>
1776
1777       <outgoingServer type="smtp">
1778          <hostname>mail2.iankelling.org</hostname>
1779          <port>587</port>
1780          <socketType>STARTTLS</socketType>
1781          <username>%EMAILADDRESS%</username>
1782          <authentication>password-cleartext</authentication>
1783          <addThisServer>true</addThisServer>
1784          <useGlobalPreferredServer>false</useGlobalPreferredServer>
1785       </outgoingServer>
1786
1787       <documentation url="https://$domain/">
1788          <descr lang="en">$domain website.</descr>
1789       </documentation>
1790     </emailProvider>
1791
1792     <webMail>
1793       <loginPage url="https://$domain/roundcube" />
1794       <loginPageInfo url="https://$domain/roundcube" >
1795         <username>%EMAILADDRESS%</username>
1796         <usernameField id="rcmloginuser" name="_user" />
1797         <passwordField id="rcmloginpwd" name="_pass" />
1798         <loginButton id="rcmloginsubmit" />
1799       </loginPageInfo>
1800     </webMail>
1801     <clientConfigUpdate url="https://autoconfig.$domain/mail/config-v1.1.xml" />
1802 </clientConfig>
1803 EOF
1804   done
1805 fi
1806
1807 # * roundcube setup
1808
1809 if [[ $HOSTNAME == bk ]]; then
1810
1811   # zip according to /installer
1812   # which requires adding a line to /usr/local/lib/roundcubemail/config/config.inc.php
1813   # $config['enable_installer'] = true;
1814   pi roundcube roundcube-sqlite3 php-zip apache2 php-fpm
1815
1816   ### begin composer install
1817   # https://getcomposer.org/doc/faqs/how-to-install-composer-programmatically.md
1818   # cd $(mktemp -d)
1819   # sum="$(wget -q -O - https://composer.github.io/installer.sig)"
1820   # m php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
1821   # if [[ $sum != $(php -r "echo hash_file('sha384', 'composer-setup.php');") ]]; then
1822   #   echo 'ERROR: Invalid composer installer checksum' >&2
1823   #   rm -fv composer-setup.php
1824   #   exit 1
1825   # fi
1826   # m php composer-setup.php --quiet
1827   # rm -fv composer-setup.php
1828   # m mv composer.phar /usr/local/bin
1829
1830   # the above method gets composer2, carddav plugin at least doesnt work with that
1831   # yet, it was just released 10-24-2020.
1832   m cd /usr/local/bin
1833   m wget -nv -N https://getcomposer.org/composer-1.phar
1834   chmod +x composer-1.phar
1835   ### end composer install
1836
1837   rcdirs=(/usr/local/lib/rcexpertpath /usr/local/lib/rcninja)
1838   ncdirs=(/var/www/ncexpertpath /var/www/ncninja)
1839   # point debian cronjob to our local install, preventing daily cron error
1840
1841   # debian's cronjob will fail, remove both paths it uses just to be sure
1842   rm -fv /usr/share/roundcube/bin/cleandb.sh /etc/cron.d/roundcube-core
1843
1844   #### begin dl roundcube
1845   # note, im r2e subbed to https://github.com/roundcube/roundcubemail/releases.atom
1846   v=1.4.13; f=roundcubemail-$v-complete.tar.gz
1847   cd /a/opt
1848   if [[ -e $f ]]; then
1849     timestamp=$(stat -c %Y $f)
1850   else
1851     timestamp=0
1852   fi
1853   m wget -nv -N https://github.com/roundcube/roundcubemail/releases/download/$v/$f
1854   new_timestamp=$(stat -c %Y $f)
1855   for rcdir in ${rcdirs[@]}; do
1856     if [[ $timestamp != "$new_timestamp" ||  ! -e "$rcdir/config/secret" ]]; then
1857       m tar -C /usr/local/lib --no-same-owner -zxf $f
1858       m rm -rf $rcdir
1859       m mv /usr/local/lib/roundcubemail-$v $rcdir
1860     fi
1861   done
1862   #### end dl roundcube
1863
1864   for ((i=0; i < ${#bkdomains[@]}; i++)); do
1865     domain=${bkdomains[i]}
1866     rcdir=${rcdirs[i]}
1867     rcbase=${rcdir##*/}
1868     ncdir=${ncdirs[i]}
1869
1870     # copied from debians cronjob
1871     i /etc/cron.d/$rcbase <<EOF
1872 #  Roundcube database cleaning: finally removes all records that are
1873 #  marked as deleted.
1874 0   5  *   *   *   www-data $rcdir/bin/cleandb.sh >/dev/null
1875 EOF
1876
1877     m /a/exe/web-conf - apache2 $domain <<EOF
1878 Alias /roundcube $rcdir
1879 ### begin roundcube settings
1880 # taken from /etc/apache2/conf-available/roundcube.conf version 1.4.8+dfsg.1-1~bpo10+1
1881 <Directory $rcdir/>
1882   Options +FollowSymLinks
1883   # This is needed to parse $rcdir/.htaccess.
1884   AllowOverride All
1885   Require all granted
1886 </Directory>
1887 # Protecting basic directories:
1888 <Directory $rcdir/config>
1889   Options -FollowSymLinks
1890   AllowOverride None
1891 </Directory>
1892 ### end roundcube settings
1893
1894
1895 ### begin nextcloud settings
1896 Alias /nextcloud "$ncdir/"
1897 <Directory $ncdir/>
1898   Require all granted
1899   AllowOverride All
1900   Options FollowSymLinks MultiViews
1901
1902   <IfModule mod_dav.c>
1903     Dav off
1904   </IfModule>
1905
1906 </Directory>
1907
1908 # based on install checker, links to
1909 # https://docs.nextcloud.com/server/19/admin_manual/issues/general_troubleshooting.html#service-discovery
1910 # their example was a bit wrong, I figured it out by adding
1911 # LogLevel warn rewrite:trace5
1912 # then watching the apache logs
1913
1914 RewriteEngine on
1915 RewriteRule ^/\.well-known/host-meta /nextcloud/public.php?service=host-meta [QSA,L]
1916 RewriteRule ^/\.well-known/host-meta\.json /nextcloud/public.php?service=host-meta-json [QSA,L]
1917 RewriteRule ^/\.well-known/webfinger /nextcloud/public.php?service=webfinger [QSA,L]
1918 RewriteRule ^/\.well-known/carddav /nextcloud/remote.php/dav/ [R=301,L]
1919 RewriteRule ^/\.well-known/caldav /nextcloud/remote.php/dav/ [R=301,L]
1920 ### end nextcloud settings
1921 EOF
1922     if [[ ! -e $rcdir/config/secret ]]; then
1923       base64 </dev/urandom | head -c24 >$rcdir/config/secret || [[ $? == 141 || ${PIPESTATUS[0]} == 32 ]]
1924     fi
1925     secret=$(cat $rcdir/config/secret)
1926
1927     rclogdir=/var/log/$rcbase
1928     rctmpdir=/var/tmp/$rcbase
1929     rcdb=/m/rc/$rcbase.sqlite
1930     # config from mailinabox
1931     i $rcdir/config/config.inc.php <<EOF
1932 <?php
1933 \$config = array();
1934 # debian creates this for us
1935 \$config['log_dir'] = '$rclogdir/';
1936 # debian also creates a temp dir, but it is under its install dir,
1937 # seems better to have our own.
1938 \$config['temp_dir'] = '$rctmpdir/';
1939 \$config['db_dsnw'] = 'sqlite:///$rcdb?mode=0640';
1940 \$config['default_host'] = 'ssl://localhost';
1941 \$config['default_port'] = 993;
1942 \$config['imap_conn_options'] = array(
1943   'ssl'         => array(
1944      'verify_peer'  => false,
1945      'verify_peer_name'  => false,
1946    ),
1947  );
1948 \$config['imap_timeout'] = 15;
1949 \$config['smtp_server'] = 'tls://127.0.0.1';
1950 \$config['smtp_conn_options'] = array(
1951   'ssl'         => array(
1952      'verify_peer'  => false,
1953      'verify_peer_name'  => false,
1954    ),
1955  );
1956 \$config['product_name'] = 'webmail';
1957 \$config['des_key'] = '$secret';
1958 \$config['plugins'] = array('archive', 'zipdownload', 'password', 'managesieve', 'jqueryui', 'carddav', 'html5_notifier');
1959 \$config['skin'] = 'elastic';
1960 \$config['login_autocomplete'] = 2;
1961 \$config['password_charset'] = 'UTF-8';
1962 \$config['junk_mbox'] = 'Spam';
1963 # disable builtin addressbook
1964 \$config['address_book_type'] = '';
1965 ?>
1966 EOF
1967
1968     m mkdir -p $rclogdir
1969     m chmod 750 $rclogdir
1970     m chown www-data:adm $rclogdir
1971     # note: subscribed to updates:
1972     # r2e add rcmcarddav https://github.com/blind-coder/rcmcarddav/commits/master.atom ian@iankelling.org
1973     # r2e add roundcube https://github.com/roundcube/roundcubemail/releases.atom ian@iankelling.org
1974     m mkdir -p $rctmpdir /m/rc
1975     m chown -R www-data.www-data $rctmpdir /m/rc
1976     m chmod 750 $rctmpdir
1977     # Ensure the log file monitored by fail2ban exists, or else fail2ban can't start.
1978     # todo: check for other mailinabox things
1979     m sudo -u www-data touch $rclogdir/errors.log
1980
1981     #### begin carddav install
1982     # This is the official roundcube carddav repo.
1983     # Install doc suggests downloading with composer, but that
1984     # didnt work, it said some ldap package for roundcube was missing,
1985     # but I dont want to download some extra ldap thing.
1986     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/INSTALL.md
1987     verf=$rcdir/plugins/carddav/myversion
1988     upgrade=false
1989     install=false
1990     v=4.0.0
1991     if [[ -e $verf ]]; then
1992       if [[ $(cat $verf) != "$v" ]]; then
1993         install=true
1994         upgrade=true
1995       fi
1996     else
1997       install=true
1998     fi
1999     if $install; then
2000       m rm -rf $rcdir/plugins/carddav
2001       tmpd=$(mktemp -d)
2002       m wget -nv -O $tmpd/t.tgz https://github.com/blind-coder/rcmcarddav/releases/download/v$v/carddav-v$v.tgz
2003       cd $rcdir/plugins
2004       tar xzf $tmpd/t.tgz
2005       rm -rf $tmpd
2006       m chown -R www-data:www-data $rcdir/plugins/carddav
2007       m cd $rcdir/plugins/carddav
2008       if $upgrade; then
2009         m sudo -u www-data composer-1.phar update --no-dev
2010       else
2011         m sudo -u www-data composer-1.phar install --no-dev
2012       fi
2013       m chown -R root:root $rcdir/plugins/carddav
2014       echo $v >$verf
2015     fi
2016
2017     # So, strangely, this worked in initial testing, but then
2018     # on first run it wouldn't show the existing contacts until
2019     # I went into the carddav settings and did "force immediate sync",
2020     # which seemed to fix things. Note, some of these settings
2021     # get initalized per/addressbook in the db, then need changing
2022     # there or through the settings menu.
2023
2024     # About categories, see https://www.davx5.com/tested-with/nextcloud
2025     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/GROUPS.md
2026     i $rcdir/plugins/carddav/config.inc.php <<EOF;
2027 <?php
2028 \$prefs['_GLOBAL']['hide_preferences'] = false;
2029 \$prefs['davserver'] = array(
2030 # name in the UI is kind of dumb. This is just something short that seems to fit ok.
2031   'name'         =>  'Main',
2032   'username'     =>  '%u', // login username
2033   'password'     =>  '%p', // login password
2034   'url'          =>  'https://$domain/nextcloud/remote.php/dav/addressbooks/users/%u/contacts',
2035   'active'       =>  true,
2036   'readonly'     =>  false,
2037   'refresh_time' => '00:10:00',
2038   'fixed'        =>  array('username','password'),
2039   'use_categories' => false,
2040   'hide'        =>  false,
2041 );
2042 ?>
2043 EOF
2044     #### end carddav install
2045
2046     cd $rcdir/plugins
2047     if [[ ! -d html5_notifier ]]; then
2048       m git clone https://github.com/stremlau/html5_notifier
2049     fi
2050     cd $rcdir/plugins/html5_notifier
2051     m git pull --rebase
2052
2053     # todo: try out roundcube plugins: thunderbird labels
2054
2055     # Password changing plugin settings
2056     cat $rcdir/plugins/password/config.inc.php.dist - >$rcdir/plugins/password/config.inc.php <<'EOF'
2057 # following are from mailinabox
2058 $config['password_minimum_length'] = 8;
2059 $config['password_db_dsn'] = 'sqlite:////m/rc/users.sqlite';
2060 $config['password_query'] = 'UPDATE users SET password=%D WHERE email=%u';
2061 $config['password_dovecotpw'] = '/usr/bin/doveadm pw';
2062 $config['password_dovecotpw_method'] = 'SHA512-CRYPT';
2063 $config['password_dovecotpw_with_method'] = true;
2064 EOF
2065     # so PHP can use doveadm, for the password changing plugin
2066     m usermod -a -G dovecot www-data
2067     m usermod -a -G mail $u
2068
2069     # so php can update passwords
2070     m chown www-data:dovecot /m/rc/users.sqlite
2071     m chmod 664 /m/rc/users.sqlite
2072
2073     # Run Roundcube database migration script (database is created if it does not exist)
2074     m $rcdir/bin/updatedb.sh --dir $rcdir/SQL --package roundcube
2075     m chown www-data:www-data $rcdb
2076     m chmod 664 $rcdb
2077   done # end loop over domains and rcdirs
2078
2079   ### begin php setup for rc ###
2080   # Enable PHP modules.
2081   m phpenmod -v php mcrypt imap
2082   # dpkg says this is required
2083   m a2enmod proxy_fcgi setenvif
2084   fpm=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* (php[^ ]*-fpm)( .*|$)/\1/p') # eg: php7.4-fpm
2085   phpver=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* php([^ ]*)-fpm( .*|$)/\1/p')
2086   m a2enconf $fpm
2087   # 3 useless guides on php fpm fcgi debian 10 later, i figure out from reading
2088   # /etc/apache2/conf-enabled/php7.3-fpm.conf
2089   m a2dismod php$phpver
2090   # according to /install, we should set date.timezone,
2091   # but that is dumb, the system already has the right zone in
2092   # $rclogdir/errors.log
2093   # todo: consider other settings in
2094   # /a/opt/mailinabox/setup/nextcloud.sh
2095   i /etc/php/$phpver/cli/conf.d/30-local.ini <<'EOF'
2096 apc.enable_cli = 1
2097 EOF
2098
2099   i /etc/php/$phpver/fpm/conf.d/30-local.ini <<'EOF'
2100 date.timezone = "America/New_York"
2101 # for nextcloud
2102 upload_max_filesize = 2000M
2103 post_max_size = 2000M
2104 # install checker, nextcloud/settings/admin/overview
2105 memory_limit = 512M
2106 EOF
2107   m systemctl restart $fpm
2108   # dunno if reload/restart is needed
2109   m systemctl reload apache2
2110   # note bk backups are defined in crontab outside this file
2111   ### end php setup for rc ###
2112
2113 fi # end roundcube setup
2114
2115 # * nextcloud setup
2116
2117 if [[ $HOSTNAME == bk ]]; then
2118   # from install checker, nextcloud/settings/admin/overview and
2119   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2120   # curl from the web installer requirement, but i switched to cli
2121   # it recommends php-file info, but that is part of php7.3-common, already got installed
2122   # with roundcube.
2123   m pi php-curl php-bz2 php-gmp php-bcmath php-imagick php-apcu
2124
2125   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2126   cat >/etc/php/$phpver/fpm/pool.d/localwww.conf <<'EOF'
2127 [www]
2128 clear_env = no
2129 EOF
2130
2131   for ((i=0; i < ${#bkdomains[@]}; i++)); do
2132     domain=${bkdomains[i]}
2133     ncdir=${ncdirs[i]}
2134     ncbase=${ncdir##*/}
2135     m cd /var/www
2136     if [[ ! -e $ncdir/index.php ]]; then
2137       # if we wanted to only install a specific version, use something like
2138       # file=latest-22.zip
2139       file=latest.zip
2140       m wget -nv -N https://download.nextcloud.com/server/releases/$file
2141       m rm -rf nextcloud
2142       m unzip -q $file
2143       m rm -f $file
2144       m chown -R www-data.www-data nextcloud
2145       m mv nextcloud $ncdir
2146       m cd $ncdir
2147       m sudo -u www-data php occ  maintenance:install --database sqlite --admin-user iank --admin-pass $nextcloud_admin_pass
2148     fi
2149     # note, strange this happend where updater did not increment the version var,
2150     # mine was stuck on 20. I manually updated it.
2151     m cd $ncdir/config
2152     if [[ ! -e config.php-orig ]]; then
2153       m cp -a config.php config.php-orig
2154     fi
2155     cat config.php-orig - >tmp.php <<EOF
2156 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/email_configuration.html
2157 \$CONFIG["mail_smtpmode"] = "sendmail";
2158 \$CONFIG["mail_smtphost"] = "127.0.0.1";
2159 \$CONFIG["mail_smtpport"] = 25;
2160 \$CONFIG["mail_smtptimeout"] = 10;
2161 \$CONFIG["mail_smtpsecure"] = "";
2162 \$CONFIG["mail_smtpauth"] = false;
2163 \$CONFIG["mail_smtpauthtype"] = "LOGIN";
2164 \$CONFIG["mail_smtpname"] = "";
2165 \$CONFIG["mail_smtppassword"] = "";
2166 \$CONFIG["mail_domain"] = "$domain";
2167
2168 # https://github.com/nextcloud/user_external#readme
2169 # plus mailinabox example
2170 #\$CONFIG['user_backends'] = array(array('class' => 'OC_User_IMAP','arguments' => array('127.0.0.1', 143, null),),);
2171
2172
2173 # based on installer check
2174 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/caching_configuration.html
2175 \$CONFIG['memcache.local'] = '\OC\Memcache\APCu';
2176
2177 \$CONFIG['overwrite.cli.url'] = 'https://$domain/nextcloud';
2178 \$CONFIG['htaccess.RewriteBase'] = '/nextcloud';
2179 \$CONFIG['trusted_domains'] = array (
2180         0 => '$domain',
2181     );
2182 #\$CONFIG[''] = '';
2183 fwrite(STDOUT, "<?php\n\\\$CONFIG = ");
2184 var_export(\$CONFIG);
2185 fwrite(STDOUT, ";\n");
2186 EOF
2187     m php tmp.php >config.php
2188     m rm tmp.php
2189     m sudo -u www-data php $ncdir/occ maintenance:update:htaccess
2190     list=$(sudo -u www-data php $ncdir/occ --output=json_pretty app:list)
2191     # user_external not compaible with nc 23
2192     for app in contacts calendar; do
2193       if [[ $(printf "%s\n" "$list"| jq ".enabled.$app") == null ]]; then
2194         m sudo -u www-data php $ncdir/occ app:install $app
2195       fi
2196     done
2197     i /etc/systemd/system/$ncbase.service <<EOF
2198 [Unit]
2199 Description=ncup $ncbase
2200 After=multi-user.target
2201
2202 [Service]
2203 Type=oneshot
2204 ExecStart=/usr/local/bin/ncup $ncbase
2205 User=www-data
2206 IOSchedulingClass=idle
2207 CPUSchedulingPolicy=idle
2208 EOF
2209     i /etc/systemd/system/$ncbase.timer <<EOF
2210 [Unit]
2211 Description=ncup $ncbase timer
2212
2213 [Timer]
2214 OnCalendar=Daily
2215
2216 [Install]
2217 WantedBy=timers.target
2218 EOF
2219     systemctl enable --now $ncbase.timer
2220     i /usr/local/bin/ncup <<'EOFOUTER'
2221 #!/bin/bash
2222 if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
2223 shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
2224 set -eE -o pipefail
2225 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR
2226
2227 ncbase=$1
2228 if ! php /var/www/$ncbase/updater/updater.phar -n; then
2229   echo failed nextcloud update for $ncbase >&2
2230   /sbin/exim -t <<EOF
2231 To: alerts@iankelling.org
2232 From: root@$(hostname -f)
2233 Subject: failed nextcloud update for $ncbase
2234
2235 For logs, run: jr -u $ncbase
2236 EOF
2237 fi
2238 EOFOUTER
2239
2240     mkdir -p /var/www/cron-errors
2241     chown www-data.www-data /var/www/cron-errors
2242     i /etc/cron.d/$ncbase <<EOF
2243 PATH=/sbin:/usr/sbin:/usr/bin:/bin:/usr/local/bin
2244 SHELL=/bin/bash
2245 # https://docs.nextcloud.com/server/20/admin_manual/configuration_server/background_jobs_configuration.html
2246 */5  *  *  *  * www-data php -f $ncdir/cron.php --define apc.enable_cli=1 |& log-once nccron
2247 EOF
2248
2249   done
2250 fi
2251
2252
2253 # * exim host conditional config
2254
2255 # ** exim certs
2256
2257 all_dirs=(/p/c/filesystem)
2258 for x in /p/c/machine_specific/*.hosts /a/bin/ds/machine_specific/*.hosts; do
2259   if grep -qxF $HOSTNAME $x; then all_dirs+=( ${x%.hosts} ); fi
2260 done
2261 files=()
2262 for d in ${all_dirs[@]}; do
2263   f=$d/etc/exim4/passwd
2264   if [[ -e $f  ]]; then
2265     files+=($f)
2266   fi
2267   tmp=($d/etc/exim4/*.pem)
2268   if (( ${#tmp[@]} )); then
2269     files+=(${tmp[@]})
2270   fi
2271 done
2272
2273 if (( ${#files[@]} )); then
2274   sudo rsync -ahhi --chown=root:Debian-exim --chmod=0640 ${files[@]} /etc/exim4/
2275 fi
2276
2277
2278 # ** exim: auth
2279
2280 case $HOSTNAME in
2281   bk|je)
2282     # avoid accepting mail for invalid users
2283     # https://wiki.dovecot.org/LMTP/Exim
2284     cat >>/etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2285 deny
2286   message = invalid recipient
2287   domains = +local_domains
2288   !verify = recipient/callout=no_cache
2289 EOF
2290     i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2291 dovecot_plain:
2292   driver = dovecot
2293   public_name = PLAIN
2294   server_socket = /var/run/dovecot/auth-client
2295   server_set_id = $auth1
2296 EOF
2297     ;;
2298 esac
2299 if $bhost_t; then
2300   i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2301 # from 30_exim4-config_examples
2302 plain_server:
2303 driver = plaintext
2304 public_name = PLAIN
2305 server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
2306 server_set_id = $auth2
2307 server_prompts = :
2308 .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
2309 server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
2310 .endif
2311 EOF
2312 fi
2313
2314 # ** exim: main daemon use non-default config file
2315 case $HOSTNAME in
2316   bk|$MAIL_HOST)
2317     # to see the default comments in /etc/default/exim4:
2318     # s update-exim4defaults --force --init
2319     # which will overwrite any existing file
2320     i /etc/default/exim4 <<'EOF'
2321 QUEUERUNNER='combined'
2322 QUEUEINTERVAL='30m'
2323 COMMONOPTIONS='-C /etc/exim4/my.conf'
2324 UPEX4OPTS='-o /etc/exim4/my.conf'
2325 #E4BCD_PANICLOG_NOISE='exim user lost privilege for using -C option'
2326 EOF
2327     chown Debian-exim:Debian-exim /usr/sbin/exim4
2328     # needs guid set in order to become Debian-exim
2329     chmod g+s,u+s /usr/sbin/exim4
2330     i /etc/exim4/trusted_configs <<'EOF'
2331 /etc/exim4/my.conf
2332 EOF
2333     ;;
2334   *)
2335     # default file
2336     i /etc/default/exim4 <<'EOF'
2337 QUEUERUNNER='combined'
2338 QUEUEINTERVAL='30m'
2339 EOF
2340     ;;
2341 esac
2342
2343 # ** exim non-root
2344
2345 case $HOSTNAME in
2346   bk|je|li)
2347     # no reason to expect it to ever be there.
2348     rm -fv /etc/systemd/system/exim4.service.d/nonroot.conf
2349     ;;
2350   *)
2351     i /etc/systemd/system/exim4.service.d/nonroot.conf <<'EOF'
2352 [Service]
2353 # see 56.2 Root privilege in exim spec
2354 AmbientCapabilities=CAP_NET_BIND_SERVICE
2355 # https://www.redhat.com/sysadmin/mastering-systemd
2356 # things that seem good and reasonabl.e
2357 PrivateTmp=yes
2358 ProtectHome=yes
2359 # note, in t10 systemd, if one of these is an sshfs mountpoint,
2360 # this whole setting doesnt work. tried it with a newer systemd 250 though
2361 # an nspawn, and it worked there.
2362 InaccessiblePaths=d m media mnt nocow o p q
2363 NoNewPrivileges=yes
2364 ProtectSystem=yes
2365
2366 # when we get newer systemd
2367 #ProtectDevices=yes
2368 EOF
2369     i /etc/exim4/conf.d/main/000_local-noroot <<'EOF'
2370 # see 56.2 Root privilege in exim spec
2371 deliver_drop_privilege = true
2372 EOF
2373     # Note: there are other routers that would also fail due to not running as root,
2374     # but afaik, the main router will catch all mail. If not, we will see
2375     # something in the queue.
2376     rm -fv /etc/exim4/conf.d/router/600_exim4-config_userforward
2377     ;;
2378 esac
2379
2380 case $HOSTNAME in
2381
2382   # ** $MAIL_HOST|bk|je)
2383   $MAIL_HOST|bk|je)
2384
2385     echo|i /etc/exim4/conf.d/router/870_backup_local
2386
2387     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2388 # note: some things we don't set that are here by default because they are unused.
2389 dc_local_interfaces=''
2390 dc_eximconfig_configtype='internet'
2391 dc_localdelivery='dovecot_lmtp'
2392 EOF
2393     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2394 # recommended if dns is expected to work
2395 CHECK_RCPT_VERIFY_SENDER = true
2396 # default config comment says: If you enable this, you might reject legitimate mail,
2397 # but eggs has had this a long time, so that seems unlikely.
2398 CHECK_RCPT_SPF = true
2399 CHECK_RCPT_REVERSE_DNS = true
2400 CHECK_MAIL_HELO_ISSUED = true
2401
2402 # enable 587 in addition to the default 25, so that
2403 # i can send mail where port 25 is firewalled by isp
2404 daemon_smtp_ports = 25 : 587
2405 # default of 25, can get stuck when catching up on mail
2406 smtp_accept_max = 400
2407 smtp_accept_reserve = 100
2408 smtp_reserve_hosts = +iank_trusted
2409
2410 # options exim has to avoid having to alter the default config files
2411 CHECK_RCPT_LOCAL_ACL_FILE = /etc/exim4/conf.d/rcpt_local_acl
2412 CHECK_DATA_LOCAL_ACL_FILE = /etc/exim4/conf.d/data_local_acl
2413 LOCAL_DENY_EXCEPTIONS_LOCAL_ACL_FILE = /etc/exim4/conf.d/local_deny_exceptions_acl
2414 # testing dmarc
2415 #dmarc_tld_file = /etc/public_suffix_list.dat
2416 EOF
2417     ;;&
2418
2419   # ** $MAIL_HOST|bk)
2420   $MAIL_HOST|bk)
2421
2422     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2423 # je.b8.nz will run out of memory with freshclam
2424 av_scanner = clamd:/var/run/clamav/clamd.ctl
2425 EOF
2426
2427     cat >> /etc/exim4/conf.d/data_local_acl <<'EOF'
2428 deny
2429   malware = */defer_ok
2430   !condition = ${if match {$malware_name}{\N^Heuristic\N}}
2431   message = This message was detected as possible malware ($malware_name).
2432 EOF
2433
2434     cat >/etc/exim4/conf.d/main/000_local-nn <<EOF
2435 # MAIN_HARDCODE_PRIMARY_HOSTNAME might mess up the
2436 # smarthost config type, not sure.
2437 # failing message on mail-tester.com:
2438 # We check if there is a server (A Record) behind your hostname kd.
2439 # You may want to publish a DNS record (A type) for the hostname kd or use a different hostname in your mail software
2440 # https://serverfault.com/questions/46545/how-do-i-change-exim4s-primary-hostname-on-a-debian-box
2441 # and this one seemed appropriate from grepping config.
2442 # I originally set this to li.iankelling.org, but then ended up with errors when li tried to send
2443 # mail to kd, so this should basically be a name that no host has as their
2444 # canonical hostname since the actual host sits behind a nat and changes.
2445 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail.iankelling.org
2446 # I used this to avoid sender verification, didnt work but it still
2447 # makes sense based on the spec.
2448 hosts_treat_as_local = defaultnn.b8.nz
2449
2450 # Outside nn, we get the default cert location from a debian macro,
2451 # and the cert file is put in place by a certbot hook.
2452 MAIN_TLS_CERTIFICATE = /etc/exim4/fullchain.pem
2453 MAIN_TLS_PRIVATEKEY = /etc/exim4/privkey.pem
2454 EOF
2455
2456     i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost <<'EOF'
2457 gnusmarthost:
2458   debug_print = "R: smarthost for $local_part@$domain"
2459   driver = manualroute
2460   domains = ! +local_domains
2461 # send most mail through eggs, helps fsfs sender reputation.
2462 # uncomment and optionally move to 188 file to send through my own servers again
2463   senders = *@gnu.org
2464   transport = smarthost_dkim
2465   route_list = * fencepost.gnu.org::587 byname
2466   host_find_failed = ignore
2467   same_domain_copy_routing = yes
2468   no_more
2469 EOF
2470
2471     /a/exe/cedit defaultnn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2472 10.173.8.1 defaultnn.b8.nz
2473 EOF
2474     ;;&
2475   # ** $MAIL_HOST)
2476   $MAIL_HOST)
2477
2478     i /etc/exim4/conf.d/router/195_dnslookup_vpn <<'EOF'
2479 # copied from /etc/exim4/conf.d/router/200_exim4-config_primary, but
2480 # use vpn transport. lower priority so it overrides the default route.
2481 # Use this in case our vpn fails, we dont send anything without it.
2482 .ifdef DCconfig_internet
2483 dnslookup_vpn:
2484   debug_print = "R: dnslookup for $local_part@$domain"
2485   driver = dnslookup
2486   domains = ! +local_domains
2487   transport = remote_smtp_vpn
2488   same_domain_copy_routing = yes
2489   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
2490   no_more
2491 .endif
2492 EOF
2493
2494
2495     # note on backups: I used to do an automatic sshfs and restricted
2496     # permissions to a specific directory on the remote server, /bu/mnt,
2497     # which required using a dedicated user, but realized smtp will be
2498     # more reliable and less fuss. If I ever need that again, see the
2499     # history of this file, and bum in brc2.
2500
2501     i /etc/exim4/conf.d/router/890_backup_copy <<EOF
2502 ### router/900_exim4-config_local_user
2503 #################################
2504
2505 # todo, it would be nice to save sent email too,
2506 # but its not so important, they still exist in my head
2507
2508 backup_redir:
2509 driver = redirect
2510 domains = +local_domains
2511 # b is just an arbirary short string
2512 data = b@eximbackup.b8.nz
2513 # note, to test this, i could temporarily allow testignore.
2514 # alerts avoids potential mail loop. root is already
2515 # redirected earlier, so that is just being overly cautious.
2516 local_parts = ! root : ! testignore : ! alerts
2517 unseen = true
2518
2519 backup_copy:
2520 driver = manualroute
2521 domains = eximbackup.b8.nz
2522 transport = backup_remote
2523 ignore_target_hosts = ${HOSTNAME}wg.b8.nz
2524 # note changes here also require change in passwd.client
2525 route_list = * eximbackup.b8.nz
2526 same_domain_copy_routing = yes
2527 errors_to = alerts@iankelling.org
2528 no_more
2529 EOF
2530
2531
2532     i /etc/exim4/conf.d/transport/30_backup_remote <<'EOF'
2533 backup_remote:
2534   driver = smtp
2535   multi_domain
2536 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
2537   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
2538 .endif
2539   hosts_require_auth = *
2540   hosts_try_auth = *
2541   envelope_to_add
2542   # manual return path because we want it to be the envelope sender
2543   # we got not the one we are using in this smtp transport
2544   headers_add = "Return-path: $sender_address"
2545 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2546   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2547 .endif
2548 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2549   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2550 .endif
2551 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2552   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2553 .endif
2554 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
2555   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
2556 .endif
2557 .ifdef REMOTE_SMTP_HEADERS_REWRITE
2558   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
2559 .endif
2560 .ifdef REMOTE_SMTP_HELO_DATA
2561   helo_data=REMOTE_SMTP_HELO_DATA
2562 .endif
2563 .ifdef TLS_DH_MIN_BITS
2564 tls_dh_min_bits = TLS_DH_MIN_BITS
2565 .endif
2566 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2567 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2568 .endif
2569 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2570 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2571 .endif
2572 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2573   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2574 .endif
2575 EOF
2576
2577
2578     # this avoids some error. i cant remember what. todo:
2579     # test it out and document why/if its needed.
2580     #     i /etc/exim4/host_local_deny_exceptions <<'EOF'
2581     # mail.fsf.org
2582     # *.posteo.de
2583     # EOF
2584
2585     # cron email from smarthost hosts will automatically be to
2586     # USER@FQDN. I redirect that to alerts@, on the smarthosts, but in
2587     # case that doesn't work, we still want to accept that mail, but not
2588     # from any host except the smarthosts. local_hostnames and this rule
2589     # is for that purpose.
2590     i /etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2591 deny
2592   !authenticated = *
2593   domains = +local_hostnames
2594   message = no relay
2595 EOF
2596     echo|i /etc/exim4/conf.d/router/880_universal_forward
2597
2598     # for iank@fsf.org, i have mail.fsf.org forward it to fsf@iankelling.org.
2599     # and also have mail.iankelling.org whitelisted as a relay domain.
2600     # I could avoid that if I changed this to submit to 587 with a
2601     # password like a standard mua.
2602     i /etc/exim4/conf.d/router/188_exim4-config_smarthost <<'EOF'
2603 # ian: copied from /etc/exim4/conf.d/router/200_exim4-config_primary, and added senders = and
2604 # replaced DCsmarthost with hostname
2605 fsfsmarthost:
2606   debug_print = "R: smarthost for $local_part@$domain"
2607   driver = manualroute
2608   domains = ! +local_domains
2609   senders = *@fsf.org
2610   transport = remote_smtp_smarthost
2611   route_list = * mail.fsf.org::587 byname
2612   host_find_failed = ignore
2613   same_domain_copy_routing = yes
2614   no_more
2615
2616 posteosmarthost:
2617   debug_print = "R: smarthost for $local_part@$domain"
2618   driver = manualroute
2619   domains = ! +local_domains
2620   senders = *@posteo.net
2621   transport = remote_smtp_smarthost
2622   route_list = * posteo.de::587 byname
2623   host_find_failed = ignore
2624   same_domain_copy_routing = yes
2625   no_more
2626
2627 EOF
2628
2629     # Greping /etc/exim4, unqualified mails this would end up as
2630     # a return path, so it should go somewhere we will see.
2631     # The debconf output about mailname is as follows:
2632     # The 'mail name' is the domain name used to 'qualify' mail addresses without a domain
2633     # name.
2634     # This name will also be used by other programs. It should be the single, fully
2635     # qualified domain name (FQDN).
2636     # Thus, if a mail address on the local host is foo@example.org, the correct value for
2637     # this option would be example.org.
2638     # This name won\'t appear on From: lines of outgoing messages if rewriting is enabled.
2639     echo iankelling.org > /etc/mailname
2640
2641
2642     # mail.iankelling.org so local imap clients can connect with tls and
2643     # when they happen to not be local.
2644     # todo: this should be 10.8.0.4
2645
2646     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2647 # note: i put nn.b8.nz into bind for good measure
2648 10.173.8.2 nn.b8.nz mx.iankelling.org
2649 EOF
2650
2651     # note: systemd-resolved will consult /etc/hosts, dnsmasq wont. this assumes
2652     # weve configured this file in dnsmasq if we are using it.
2653     /a/exe/cedit mail /etc/dnsmasq-servers.conf <<'EOF' || [[ $? == 1 ]]
2654 server=/mx.iankelling.org/127.0.1.1
2655 EOF
2656     # I used to use debconf-set-selections + dpkg-reconfigure,
2657     # which then updates this file
2658     # but the process is slower than updating it directly and then I want to set other things in
2659     # update-exim4.conf.conf, so there's no point.
2660     # The file is documented in man update-exim4.conf,
2661     # except the man page is not perfect, read the bash script to be sure about things.
2662
2663     # The debconf questions output is additional documentation that is not
2664     # easily accessible, but super long, along with the initial default comment in this
2665     # file, so I've saved that into ./mail-notes.conf.
2666     #
2667     # # TODO: remove mx.iankelling.org once systems get updated mail-setup from jan 2022
2668     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2669 # man page: is used to build the local_domains list, together with "localhost"
2670 # this is duplicated in a later router.
2671 dc_other_hostnames='iankelling.org;zroe.org;r2e.iankelling.org;mx.iankelling.org;!je.b8.nz;!bk.b8.nz;*.b8.nz;b8.nz'
2672 EOF
2673
2674
2675     # dmarc. not used currently
2676     f=/etc/cron.daily/refresh-dmarc-tld-file
2677     cat >$f <<'EOF'
2678 #!/bin/bash
2679 cd /etc
2680 wget -q -N https://publicsuffix.org/list/public_suffix_list.dat
2681 EOF
2682     m chmod 755 $f
2683
2684     ;;
2685   # ** bk
2686   ## we use this host to monitor MAIL_HOST and host a mail server for someone
2687   bk)
2688
2689     echo|i /etc/exim4/conf.d/rcpt_local_acl
2690     echo|i /etc/exim4/conf.d/router/880_universal_forward
2691
2692     echo amnimal.ninja > /etc/mailname
2693
2694     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2695 10.173.8.2 nn.b8.nz
2696 EOF
2697
2698     sed -r -f - /etc/init.d/exim4  <<'EOF' | i /etc/init.d/exim4in
2699 s,/etc/default/exim4,/etc/default/exim4in,g
2700 s,/run/exim4/exim.pid,/run/exim4/eximin.pid,g
2701 s,(^[ #]*Provides:).*,\1 exim4in,
2702 s,(^[ #]*NAME=).*,\1"exim4in",
2703 EOF
2704     chmod +x /etc/init.d/exim4in
2705     i /etc/systemd/system/exim4in.service.d/alwaysrestart.conf <<'EOF'
2706 [Unit]
2707 # needed to continually restart
2708 StartLimitIntervalSec=0
2709
2710 [Service]
2711 Restart=always
2712 # time to sleep before restarting a service
2713 RestartSec=20
2714 EOF
2715
2716     i /etc/default/exim4in <<'EOF'
2717 # defaults but no queue runner and alternate config dir
2718 QUEUERUNNER='no'
2719 COMMONOPTIONS='-oP /run/exim4/eximin.pid'
2720 UPEX4OPTS='-d /etc/myexim4'
2721 EOF
2722
2723     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2724 # man page: is used to build the local_domains list, together with "localhost"
2725 dc_other_hostnames='amnimal.ninja;expertpathologyreview.com'
2726 EOF
2727
2728     ;;
2729   # ** je
2730   je)
2731     echo je.b8.nz > /etc/mailname
2732     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2733 dc_other_hostnames='je.b8.nz'
2734 EOF
2735     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2736     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2737     echo|i /etc/exim4/conf.d/rcpt_local_acl
2738     echo|i /etc/exim4/conf.d/router/880_universal_forward
2739     ;;
2740   # ** not MAIL_HOST|bk|je
2741   *)
2742     # this one should be removed for all non mail hosts, but
2743     # bk and je never become mail_host
2744     echo|i /etc/exim4/conf.d/router/195_dnslookup_vpn
2745
2746     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2747     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2748     echo|i /etc/exim4/conf.d/rcpt_local_acl
2749     echo|i /etc/exim4/conf.d/router/890_backup_copy
2750     echo|i /etc/exim4/conf.d/main/000_local-nn
2751
2752
2753     if $bhost_t; then
2754       cat >>/etc/exim4/conf.d/main/000_local <<EOF
2755 MAIN_TLS_CERTIFICATE = /etc/exim4/certs/$wghost/fullchain.pem
2756 MAIN_TLS_PRIVATEKEY = /etc/exim4/certs/$wghost/privkey.pem
2757 # so we can maintiain the originals of the backups.
2758 # we wouldnt want this if we were dealing with any other
2759 # local deliveries, but we sent all others to the smarthost
2760 # which then strips the headers.
2761 envelope_to_remove = false
2762 return_path_remove = false
2763 EOF
2764     fi
2765
2766     # catches things like cronjob email
2767     i /etc/exim4/conf.d/router/880_universal_forward <<'EOF'
2768 universal_forward:
2769   driver = redirect
2770   domains = +local_domains
2771   data = alerts@iankelling.org
2772 EOF
2773
2774
2775     for unit in ${nn_progs[@]}; do
2776       f=/etc/systemd/system/$unit.service.d/nn.conf
2777       rm -fv $f
2778     done
2779
2780     # dont i dont care if defaultnn section gets left, it wont
2781     # get used.
2782     echo | /a/exe/cedit nn /etc/hosts || [[ $? == 1 ]]
2783     echo | /a/exe/cedit mail /etc/dnsmasq-servers.conf || [[ $? == 1 ]]
2784
2785
2786     if $bhost_t; then
2787       install -d /bu
2788       install -d -g $u -o $u -m 771 /bu/md
2789       i /etc/exim4/conf.d/transport/30_backup_maildir <<EOF
2790 # modified debian maildir transport
2791 backup_maildir:
2792   driver = appendfile
2793   directory = /bu/md
2794   delivery_date_add
2795   # note, no return path or envelope added
2796   maildir_format
2797   directory_mode = 0700
2798   mode = 0644
2799   mode_fail_narrower = false
2800   user = $u
2801 EOF
2802
2803       i /etc/exim4/conf.d/router/870_backup_local <<EOF
2804 ### router/900_exim4-config_local_user
2805 #################################
2806
2807 backup_local:
2808   debug_print = "R: local_user for \$local_part@\$domain"
2809   driver = accept
2810   domains = eximbackup.b8.nz
2811   transport = backup_maildir
2812 EOF
2813
2814       # Bind to wghole to receive mailbackup.
2815       wgholeip=$(sed -rn 's/^ *Address *= *([^/]+).*/\1/p' /etc/wireguard/wghole.conf)
2816       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2817 dc_other_hostnames='eximbackup.b8.nz'
2818 dc_local_interfaces='127.0.0.1;::1;$wgholeip'
2819 EOF
2820
2821       # wghole & thus exim will fail to start without internet connectivity.
2822       i /etc/systemd/system/exim4.service.d/backup.conf <<'EOF'
2823 [Unit]
2824 StartLimitIntervalSec=0
2825
2826 [Service]
2827 Restart=always
2828 RestartSec=20
2829 EOF
2830
2831     else
2832       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2833 # Note: If theres like a temporary problem where mail gets sent to
2834 # one of these hosts, if exim isnt listening, it will be a temporary error
2835 # instead of a permanent 5xx.
2836 dc_local_interfaces='127.0.0.1;::1'
2837 EOF
2838       rm -fv /etc/systemd/system/exim4.service.d/backup.conf
2839     fi
2840     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2841 dc_eximconfig_configtype='smarthost'
2842 dc_smarthost='$smarthost'
2843 EOF
2844
2845     hostname -f |i /etc/mailname
2846     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2847 # The manpage incorrectly states this will do header rewriting, but
2848 # that only happens if we have dc_hide_mailname is set.
2849 dc_readhost='iankelling.org'
2850 # Only used in case of bounces.
2851 dc_localdelivery='maildir_home'
2852 EOF
2853     ;;
2854 esac
2855
2856
2857
2858
2859 # ** $MAILHOST|bk, things that belong at the end
2860 case $HOSTNAME in
2861   $MAIL_HOST|bk)
2862     # config for the non-nn exim
2863     m rsync -ra --delete /etc/exim4/ /etc/myexim4
2864     # If we ever wanted to have a separate spool,
2865     # we could do it like this.
2866     #     cat >>/etc/exim4/conf.d/main/000_local-nn <<'EOF'
2867     # spool_directory = /var/spool/myexim4
2868     # EOF
2869     cat >>/etc/myexim4/update-exim4.conf.conf <<'EOF'
2870 dc_eximconfig_configtype='smarthost'
2871 dc_smarthost='nn.b8.nz'
2872 EOF
2873     ;;&
2874   bk)
2875
2876     # config for the non-nn exim
2877     cat >/etc/myexim4/conf.d/main/000_local-nn <<'EOF'
2878 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail2.iankelling.org
2879 EOF
2880     ;;
2881   $MAIL_HOST)
2882     # for bk, we have a exim4in.service that will do this for us.
2883     m update-exim4.conf -d /etc/myexim4
2884     ;;
2885 esac
2886
2887 # * spool dir setup
2888
2889 # ** bind mount setup
2890 # put spool dir in directory that spans multiple distros.
2891 # based on http://www.postfix.org/qmgr.8.html and my notes in gnus
2892 #
2893 dir=/nocow/exim4
2894 sdir=/var/spool/exim4
2895 # we only do this if our system has $dir
2896
2897 # this used to do a symlink, but, in the boot logs, /nocow would get mounted succesfully,
2898 # about 2 seconds later, exim starts, and immediately puts into paniclog:
2899 # honVi-0000u3-82 Failed to create directory "/var/spool/exim4/input": No such file or directory
2900 # so, im trying a bind mount to get rid of that.
2901 if [[ -e /nocow ]]; then
2902   if ! grep -Fx "/nocow/exim4  /var/spool/exim4  none  bind  0 0" /etc/fstab; then
2903     echo "/nocow/exim4  /var/spool/exim4  none  bind  0 0" >>/etc/fstab
2904   fi
2905   i /etc/systemd/system/exim4.service.d/override.conf <<'EOF'
2906 [Unit]
2907 # without local-fs on exim, we get these kind of errors in paniclog on shutdown:
2908 # Failed to create spool file /var/spool/exim4//input//1jCLxz-0008V4-V9-D: Permission denied
2909 After=local-fs.target
2910 EOF
2911   if ! mountpoint -q $sdir; then
2912     stopifactive exim4 exim4in
2913     if [[ -L $sdir ]]; then
2914       m rm $sdir
2915     fi
2916     if [[ ! -e $dir && -d $sdir ]]; then
2917       m mv $sdir $dir
2918     fi
2919     if [[ ! -d $sdir ]]; then
2920       m mkdir $sdir
2921       m chmod 000 $sdir # only want it to be used when its mounted
2922     fi
2923     m mount $sdir
2924   fi
2925 fi
2926
2927
2928
2929 # ** exim/spool uid setup
2930 # i have the spool directory be common to distro multi-boot, so
2931 # we need the uid to be the same. 608 cuz it's kind of in the middle
2932 # of the free system uids.
2933 IFS=:; read -r _ _ uid _ < <(getent passwd Debian-exim ||:) ||:; unset IFS
2934 IFS=:; read -r _ _ gid _ < <(getent group Debian-exim ||:) ||:; unset IFS
2935 if [[ ! $uid ]]; then
2936   # from /var/lib/dpkg/info/exim4-base.postinst, plus uid and gid options
2937   m adduser --uid 608 --system --group --quiet --home /var/spool/exim4 \
2938     --no-create-home --disabled-login --force-badname Debian-exim
2939 elif [[ $uid != 608 ]]; then
2940   stopifactive exim4 exim4in
2941   m usermod -u 608 Debian-exim
2942   m groupmod -g 608 Debian-exim
2943   m usermod -g 608 Debian-exim
2944   m find / /nocow -path ./var/tmp -prune -o -xdev -uid $uid -execdir chown -h 608 {} +
2945   m find / /nocow -path ./var/tmp -prune -o -xdev -gid $gid -execdir chgrp -h 608 {} +
2946 fi
2947
2948 # * start / stop services
2949
2950 reifactive dnsmasq nscd
2951
2952 if $reload; then
2953   m systemctl daemon-reload
2954 fi
2955
2956 m systemctl --now enable epanicclean.timer
2957
2958 case $HOSTNAME in
2959   je)
2960     /a/exe/web-conf apache2 je.b8.nz
2961     ;;
2962   bk)
2963     /a/exe/web-conf apache2 mail2.iankelling.org
2964     ;;
2965 esac
2966
2967 m /a/bin/ds/mail-cert-cron -1
2968 sre mailcert.timer
2969
2970 case $HOSTNAME in
2971   bk)
2972     # todo, this should be done in distro-begin
2973     soff systemd-resolved
2974     ln -sf 127.0.0.1-resolv/stub-resolv.conf /etc/resolv.conf
2975     ;;&
2976   $MAIL_HOST|bk)
2977     m systemctl --now enable mailnn mailnnroute
2978     ;;&
2979   $MAIL_HOST)
2980     # we use dns to start wg
2981     if $reload; then
2982       sre unbound
2983     else
2984       m systemctl --now enable unbound
2985     fi
2986     ;;&
2987   $MAIL_HOST|bk)
2988     # If these have changes, id rather manually restart it, id rather
2989     # not restart and cause temporary errors
2990     if $reload; then
2991       sre $vpnser
2992     else
2993       m systemctl --now enable $vpnser
2994     fi
2995     if ! systemctl is-active clamav-daemon >/dev/null; then
2996       m systemctl --now enable clamav-daemon
2997       out=$(rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/filesystem/etc/systemd/system/epanicclean.{timer,service} /etc/systemd/system)
2998       if [[ $out ]]; then
2999         reload=true
3000       fi
3001
3002       # note, this will cause paniclog entries because it takes like 45
3003       # seconds for clamav to start, i use ./epanic-clean to remove
3004       # them.
3005     fi
3006     ;;&
3007   $MAIL_HOST|bk|je)
3008     # start spamassassin/dovecot before exim.
3009     sre dovecot spamassassin
3010     # need to wait a bit before restarting exim, else I
3011     # get a paniclog entry like: spam acl condition: all spamd servers failed
3012     sleep 3
3013     m systemctl --now enable mailclean.timer
3014     ;;&
3015   $MAIL_HOST)
3016     # < 2.1 (eg: in t9), uses a different data format which required manual
3017     # migration. dont start if we are running an old version.
3018     if dpkg --compare-versions $(dpkg -s radicale | awk '$1 == "Version:" { print $2 }') ge 2.1; then
3019       m systemctl --now enable radicale
3020     fi
3021     ;;&
3022 esac
3023
3024 # last use of $reload happens in previous block
3025 rm -f /var/local/mail-setup-reload
3026
3027
3028 case $HOSTNAME in
3029   $MAIL_HOST|bk|je) : ;;
3030   *)
3031     soff radicale mailclean.timer dovecot spamassassin $vpnser mailnn clamav-daemon
3032     ;;
3033 esac
3034
3035 sre exim4
3036
3037 case $HOSTNAME in
3038   $MAIL_HOST)
3039     m systemctl --now enable mailbindwatchdog
3040     ;;
3041   *)
3042     soff mailbindwatchdog
3043     ;;
3044 esac
3045
3046
3047 case $HOSTNAME in
3048   bk) sre exim4in ;;
3049 esac
3050
3051 # * mail monitoring / testing
3052
3053 # note, to test clamav, send an email with body that only contains
3054 # https://en.wikipedia.org/wiki/EICAR_test_file
3055 # which set malware_name to Eicar-Signature
3056 case $HOSTNAME in
3057   $MAIL_HOST|bk|je)
3058     # note: cronjob "ian" also does some important monitoring
3059     # todo: this will sometimes cause an alert because mailtest-check will run
3060     # before we have setup network namespace and spamassassin
3061     cat >/etc/cron.d/mailtest <<EOF
3062 SHELL=/bin/bash
3063 PATH=/usr/bin:/bin:/usr/local/bin
3064 MAILTO=alerts@iankelling.org
3065 */5 * * * *   $u send-test-forward |& log-once send-test-forward
3066 */10 * * * *   root chmod -R g+rw /m/md/bounces |& log-once -1 bounces-chmod
3067 # im seeing some intermittent failures on the slow check, do it all the time
3068 # for now. It looks like a dns failure.
3069 #5-59/5 * * * *   root mailtest-check |& log-once -1 mailtest-check
3070 #0 * * * *   root mailtest-check slow |& log-once -1 mailtest-slow
3071 */5 * * * *   root timeout 290 mailtest-check slow |& log-once -12 mailtest-check
3072 EOF
3073     m sudo rsync -ahhi --chown=root:root --chmod=0755 \
3074       /b/ds/mailtest-check /b/ds/check-remote-mailqs /usr/local/bin/
3075     ;;&
3076   $MAIL_HOST)
3077     test_froms=(ian@iankelling.org z@zroe.org iank@gnu.org)
3078     test_to="testignore@expertpathologyreview.com, testignore@je.b8.nz, testignore@amnimal.ninja, jtuttle@gnu.org"
3079
3080     cat >>/etc/cron.d/mailtest <<EOF
3081 2   * * * *   root check-remote-mailqs |& log-once check-remote-mailqs
3082 EOF
3083     ;;&
3084   bk)
3085     test_froms=(testignore@expertpathologyreview.com testignore@amnimal.ninja)
3086     test_to="testignore@iankelling.org, testignore@zroe.org, testignore@je.b8.nz"
3087     ;;&
3088   je)
3089     test_froms=(testignore@je.b8.nz)
3090     test_to="testignore@iankelling.org, testignore@zroe.org, testignore@expertpathologyreview.com, testignore@amnimal.ninja"
3091     ;;&
3092   $MAIL_HOST|bk|je)
3093     cat >/usr/local/bin/send-test-forward <<'EOF'
3094 #!/bin/bash
3095 olds=(
3096 $(/sbin/exiqgrep -o 260 -i -r '^(testignore@(iankelling\.org|zroe\.org|expertpathologyreview\.com|amnimal\.ninja|je\.b8\.nz)|jtuttle@gnu\.org)$')
3097 )
3098 if (( ${#olds[@]} )); then
3099   /sbin/exim -Mrm "${olds[@]}" >/dev/null
3100 fi
3101 EOF
3102     for test_from in ${test_froms[@]}; do
3103       cat >>/usr/local/bin/send-test-forward <<EOFOUTER
3104 /usr/sbin/exim -f $test_from -t <<EOF
3105 From: $test_from
3106 To: $test_to
3107 Subject: test \$(date +%Y-%m-%dT%H:%M:%S%z) \$(date +%s)
3108
3109 /usr/local/bin/send-test-forward
3110 EOF
3111 EOFOUTER
3112     done
3113     m chmod +x /usr/local/bin/send-test-forward
3114     ;;
3115   *)
3116     rm -fv /etc/cron.d/mailtest
3117     ;;
3118 esac
3119
3120
3121
3122 # * misc
3123 m sudo -u $u mkdir -p /home/$u/.cache
3124 set -- /m/mucache /home/$u/.cache/mu /m/.mu /home/$u/.mu
3125 while (($#)); do
3126   target=$1
3127   f=$2
3128   shift 2
3129   if [[ ! -L $f ]]; then
3130     if [[ -e $f ]]; then
3131       rm -rf $f
3132     fi
3133     m sudo -u $u ln -sf -T $target $f
3134   fi
3135 done
3136
3137
3138 # /etc/alias setup is debian specific, and exim postinst script sets up
3139 # an /etc/alias from root to the postmaster, based on the question
3140 # exim4-config exim4/dc_postmaster, as long as there exists an entry for
3141 # root, or there was no preexisting aliases file. postfix won\'t set up
3142 # a root to $postmaster alias if it\'s already installed. Easiest to
3143 # just set it ourselves.
3144
3145 # debconf question for postmaster:
3146 # Mail for the 'postmaster', 'root', and other system accounts needs to be redirected
3147 # to the user account of the actual system administrator.
3148 # If this value is left empty, such mail will be saved in /var/mail/mail, which is not
3149 # recommended.
3150 # Note that postmaster\'s mail should be read on the system to which it is directed,
3151 # rather than being forwarded elsewhere, so (at least one of) the users listed here
3152 # should not redirect their mail off this machine. A 'real-' prefix can be used to
3153 # force local delivery.
3154 # Multiple user names need to be separated by spaces.
3155 # Root and postmaster mail recipient:
3156
3157 m exit 0
3158 :
3159
3160 # Local Variables:
3161 # eval: (outline-minor-mode)
3162 # outline-regexp: "\\( *\\)# [*]\\{1,8\\} "
3163 # End:
3164 # this is combined with defining outline-level in init.el