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]}" "$@"
 138
 139 # note, this is hardcoded in /etc/exim4/conf.d/main/000_local
 140 u=$(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   local dir="${dest%/*}"
 283   if [[ $dir != "$base" ]]; then
 284     mkdir -p ${dest%/*}
 285   fi
 286   ir=false # i result
 287   tmpdir=$(mktemp -d)
 288   cat >$tmpdir/"$base"
 289   tmp=$(rsync -ic $tmpdir/"$base" "$dest")
 290   if [[ $tmp ]]; then
 291     printf "%s\n" "$tmp"
 292     ir=true
 293     if [[ $dest == /etc/systemd/system/* ]]; then
 294       touch /var/local/mail-setup-reload
 295       reload=true
 296     fi
 297   fi
 298   rm -rf $tmpdir
 299 }
 300 setini() {
 301   key="$1" value="$2" section="$3"
 302   file="/etc/radicale/config"
 303   sed -ri "/ *\[$section\]/,/^ *\[[^]]+\]/{/^\s*${key}[[:space:]=]/d};/ *\[$section\]/a $key = $value" "$file"
 304 }
 305 soff () {
 306   for service; do
 307     # ignore services that dont exist
 308     if systemctl cat $service &>/dev/null; then
 309       m systemctl disable --now $service
 310     fi
 311   done
 312 }
 313 sre() {
 314   for service; do
 315     m systemctl restart $service
 316     m systemctl enable $service;
 317   done
 318 }
 319 mailhost() {
 320   [[ $HOSTNAME == "$MAIL_HOST" ]]
 321 }
 322 e() { printf "%s\n" "$*"; }
 323 reifactive() {
 324   for service; do
 325     if systemctl is-active $service >/dev/null; then
 326       m systemctl restart $service
 327     fi
 328   done
 329 }
 330 stopifactive() {
 331   for service; do
 332     if systemctl is-active $service >/dev/null; then
 333       m systemctl stop $service
 334     fi
 335   done
 336 }
 337
 338 mxhost=mx.iankelling.org
 339 mxport=587
 340 forward=$u@$mxhost
 341
 342 # old setup. left as comment for example
 343 # mxhost=mail.messagingengine.com
 344 # mxport=587
 345 # forward=ian@iankelling.org
 346
 347 smarthost="$mxhost::$mxport"
 348 uhome=$(eval echo ~$u)
 349
 350 # Somehow on one machine, a file got written with 664 perms.
 351 # just being defensive here.
 352 umask 0022
 353
 354 source /a/bin/bash_unpublished/source-state
 355 if [[ ! $MAIL_HOST ]]; then
 356   err "\$MAIL_HOST not set"
 357 fi
 358
 359 bhost_t=false
 360 case $HOSTNAME in
 361   $MAIL_HOST) : ;;
 362   kd|frodo|x2|x3|kw|sy|bo)
 363     bhost_t=true
 364     ;;
 365 esac
 366
 367
 368 # * Install universal packages
 369
 370
 371 # installs epanicclean iptables-exim ip6tables-exim
 372 /a/bin/ds/install-my-scripts
 373
 374 if [[ $(debian-codename-compat) == bionic ]]; then
 375   cat >/etc/apt/preferences.d/spamassassin <<'EOF'
 376 Package: spamassassin sa-compile spamc
 377 Pin: release n=focal,o=Ubuntu
 378 Pin-Priority: 500
 379 EOF
 380 fi
 381
 382 # light version of exim does not have sasl auth support.
 383 pi-nostart exim4 exim4-daemon-heavy spamassassin openvpn unbound clamav-daemon wireguard
 384
 385 # note: pyzor debian readme says you need to run some initialization command
 386 # but its outdated.
 387 pi spf-tools-perl p0f postgrey pyzor razor jq moreutils certbot fail2ban
 388 # bad packages that sometimes get automatically installed
 389 pu openresolv resolvconf
 390
 391 soff openvpn
 392
 393
 394 if [[ $(debian-codename) == etiona ]]; then
 395   # ip6tables stopped loading on boot. openvpn has reduced capability set,
 396   # so running iptables as part of openvpn startup wont work. This should do it.
 397   pi iptables-persistent
 398   cat >/etc/iptables/rules.v6 <<'EOF'
 399 *mangle
 400 COMMIT
 401 *nat
 402 COMMIT
 403 EOF
 404   # load it now.
 405   m ip6tables -S >/dev/null
 406 fi
 407
 408 # our nostart pi fails to avoid enabling
 409
 410
 411 # * Mail clean cronjob
 412
 413 i /etc/systemd/system/mailclean.timer <<'EOF'
 414 [Unit]
 415 Description=Run mailclean daily
 416
 417 [Timer]
 418 OnCalendar=monthly
 419
 420 [Install]
 421 WantedBy=timers.target
 422 EOF
 423
 424 i /etc/systemd/system/mailclean.service <<EOF
 425 [Unit]
 426 Description=Delete and archive old mail files
 427 After=multi-user.target
 428
 429 [Service]
 430 User=$u
 431 Type=oneshot
 432 ExecStart=/usr/local/bin/sysd-mail-once mailclean /a/bin/distro-setup/mailclean
 433 EOF
 434
 435 # * postgrey
 436
 437
 438 i /etc/default/postgrey <<'EOF'
 439 POSTGREY_OPTS="--exim --unix=/var/run/postgrey/postgrey.sock --retry-window=4 --max-age=60"
 440 EOF
 441
 442 # * clamav
 443
 444 m usermod -a -G Debian-exim clamav
 445
 446 i /etc/systemd/system/clamav-daemon.service.d/fix.conf <<EOF
 447 [Service]
 448 ExecStartPre=-/bin/mkdir /var/run/clamav
 449 ExecStartPre=/bin/chown clamav /var/run/clamav
 450 EOF
 451
 452 # * mail vpn config
 453
 454 # old.
 455 #vpnser=mailvpn.service
 456 # todo: this hangs if it cant resolv the endpoint. we
 457 # want it to just retry in the background.
 458 vpnser=wg-quick@wgmail.service
 459
 460 case $HOSTNAME in
 461   $MAIL_HOST)
 462     rsync -aiSAX --chown=root:root --chmod=g-s /p/c/filesystem/etc/wireguard/ /etc/wireguard
 463     bindpaths="/etc/127.0.0.1-resolv:/run/systemd/resolve /etc/basic-nsswitch:/etc/resolved-nsswitch:norbind"
 464     ;;&
 465   bk)
 466     bindpaths="/etc/10.173.8.1-resolv:/etc/127.0.0.1-resolv"
 467     ;;&
 468   *)
 469     d=/p/c/machine_specific/$HOSTNAME/filesystem/etc/wireguard/
 470     if [[ -d $d ]]; then
 471       rsync -aiSAX --chown=root:root --chmod=g-s $d  /etc/wireguard
 472     fi
 473     ;;
 474 esac
 475
 476 case $HOSTNAME in
 477   li) : ;;
 478   *)
 479     i /etc/systemd/system/wg-quick@wgmail.service.d/override.conf <<EOF
 480 [Unit]
 481 Requires=mailnn.service
 482 After=network.target mailnn.service
 483 JoinsNamespaceOf=mailnn.service
 484 BindsTo=mailnn.service
 485 StartLimitIntervalSec=0
 486
 487 [Service]
 488 PrivateNetwork=true
 489 # i dont think we need any of these, but it doesnt hurt to stay consistent
 490 BindPaths=$bindpaths
 491
 492 Restart=on-failure
 493 RestartSec=20
 494 EOF
 495     ;;
 496 esac
 497
 498
 499 # https://selivan.github.io/2017/12/30/systemd-serice-always-restart.html
 500 i /etc/systemd/system/mailvpn.service <<EOF
 501 [Unit]
 502 Description=OpenVPN tunnel for mail
 503 After=syslog.target network-online.target mailnn.service
 504 Wants=network-online.target
 505 Documentation=man:openvpn(8)
 506 Documentation=https://community.openvpn.net/openvpn/wiki/Openvpn24ManPage
 507 Documentation=https://community.openvpn.net/openvpn/wiki/HOWTO
 508 # needed to continually restatr
 509 JoinsNamespaceOf=mailnn.service
 510 BindsTo=mailnn.service
 511 StartLimitIntervalSec=0
 512
 513 [Service]
 514 Type=notify
 515 RuntimeDirectory=openvpn-client
 516 RuntimeDirectoryMode=0710
 517 WorkingDirectory=/etc/openvpn/client
 518 ExecStart=/usr/sbin/openvpn --suppress-timestamps --nobind --config /etc/openvpn/client/mail.conf
 519 #CapabilityBoundingSet=CAP_IPC_LOCK CAP_NET_ADMIN CAP_NET_RAW CAP_SETGID CAP_SETUID CAP_SYS_CHROOT CAP_DAC_OVERRIDE
 520 LimitNPROC=10
 521 # DeviceAllow=/dev/null rw
 522 # DeviceAllow=/dev/net/tun rw
 523 PrivateNetwork=true
 524 # in the network namespace, we cant connect to systemd-resolved on 127.0.0.53,
 525 # because of
 526 # https://unix.stackexchange.com/questions/445782/how-to-allow-systemd-resolved-to-listen-to-an-interface-other-than-loopback
 527 # there is a workaround there, but i dont think its really worth it,
 528 # the mail server is fine with a static dns anyways.
 529 # This thread is also interesting,
 530 # https://github.com/slingamn/namespaced-openvpn/issues/7
 531 # todo: the iptables rule at the bottom could be useful to prevent
 532 # dns from leaking in my network namespaced vpn.
 533 # I also like the idea of patching systemd-resolved so it
 534 # will listen on other interfaces, but its not worth my time.
 535 BindPaths=$bindpaths
 536 Restart=always
 537 # time to sleep before restarting a service
 538 RestartSec=20
 539
 540 [Install]
 541 WantedBy=multi-user.target
 542 EOF
 543
 544 i /etc/systemd/system/mailnnroute.service <<'EOF'
 545 [Unit]
 546 Description=Network routing for mailnn
 547 After=syslog.target network-online.target mailnn.service
 548 Wants=network-online.target
 549 JoinsNamespaceOf=mailnn.service
 550 BindsTo=mailnn.service
 551 StartLimitIntervalSec=0
 552
 553 [Service]
 554 Type=simple
 555 RemainAfterExit=true
 556 PrivateNetwork=true
 557 ExecStart=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns -n 10.173.8 start mail
 558 ExecStop=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns stop mail
 559 Restart=always
 560 RestartSec=20
 561
 562
 563 [Install]
 564 WantedBy=multi-user.target
 565 EOF
 566
 567 #
 568 i /etc/systemd/system/mailnn.service <<'EOF'
 569 [Unit]
 570 Description=Network Namespace for mail vpn service that will live forever and cant fail
 571 After=syslog.target network-online.target
 572 Wants=network-online.target
 573
 574 [Service]
 575 Type=simple
 576 PrivateNetwork=true
 577 ExecStart=/bin/sleep infinity
 578
 579 [Install]
 580 WantedBy=multi-user.target
 581 EOF
 582
 583 i /etc/systemd/system/mailbindwatchdog.service <<EOF
 584 [Unit]
 585 Description=Watchdog to restart services relying on systemd-resolved dir
 586 After=syslog.target network-online.target
 587 Wants=network-online.target
 588 BindsTo=mailnn.service
 589
 590 [Service]
 591 Type=simple
 592 ExecStart=/usr/local/bin/mailbindwatchdog $vpnser ${nn_progs[@]} unbound.service radicale.service
 593 Restart=always
 594 # time to sleep before restarting a service
 595 RestartSec=10
 596
 597 [Install]
 598 WantedBy=multi-user.target
 599 EOF
 600
 601
 602
 603 # old service name
 604 rm -fv /etc/systemd/system/openvpn-client-mail@.service
 605
 606 # We use a local unbound because systemd-resolved wont accept our
 607 # request, it will only listen to 127.0.0.53 in the main network
 608 # namespace, and rejected feature requests to change that (although I
 609 # could change the code and recompile), but anyways, that could answer
 610 # with things specific to the lan that aren't applicable in this
 611 # namespace, and since unbound is a recursive resolver, it means we just
 612 # use our own ip against dnsbl rate limits.
 613 #
 614 # If we ever notice this change, chattr +i on it
 615 # trust-ad is used in t10+, glibc 2.31
 616
 617 i /etc/127.0.0.1-resolv/stub-resolv.conf <<'EOF'
 618 nameserver 127.0.0.1
 619 options edns0 trust-ad
 620 EOF
 621
 622 i /etc/127.0.0.53-resolv/stub-resolv.conf <<'EOF'
 623 nameserver 127.0.0.53
 624 options edns0 trust-ad
 625 EOF
 626
 627
 628 i /etc/10.173.8.1-resolv/stub-resolv.conf <<'EOF'
 629 nameserver 10.173.8.1
 630 options edns0 trust-ad
 631 EOF
 632
 633 # this is just a bug fix for trisquel.
 634 f=/etc/apparmor.d/usr.sbin.unbound
 635 line="/usr/sbin/unbound flags=(attach_disconnected) {"
 636 if ! grep -qFx "$line" $f; then
 637   badline="/usr/sbin/unbound {"
 638   if ! grep -qFx "$badline" $f; then
 639     err expected line in $f not found
 640   fi
 641   sed -i "s,^$badline$,$line," $f
 642   if systemctl is-active apparmor &>/dev/null; then
 643     m systemctl reload apparmor
 644   fi
 645 fi
 646
 647 # note: anything added to nn_progs needs corresponding rm
 648 # down below in the host switch
 649 nn_progs=(exim4)
 650 if mailhost; then
 651   # Note dovecots lmtp doesnt need to be in the same nn to accept delivery.
 652   # Its in the nn so remote clients can connect to it.
 653   nn_progs+=(spamassassin dovecot)
 654 fi
 655
 656 case $HOSTNAME in
 657   $MAIL_HOST)
 658     i /etc/systemd/system/unbound.service.d/nn.conf <<EOF
 659 [Unit]
 660 After=mailnn.service
 661 JoinsNamespaceOf=mailnn.service
 662 BindsTo=mailnn.service
 663 StartLimitIntervalSec=0
 664
 665 [Service]
 666 PrivateNetwork=true
 667 # note the nsswitch bind is actually not needed for bk, but
 668 # its the same file so it does no harm.
 669 BindPaths=$bindpaths
 670
 671 Restart=always
 672 RestartSec=20
 673 EOF
 674
 675     # sooo, there are a few ways to get traffic from the mail network
 676     # namespace to go over the wghole.
 677     #
 678     #1: unify the mail vpn and wghole
 679     # into 1 network.  this seems simple and logical, so I'm doing it.
 680     # One general downside is tying things together, if I need to mess
 681     # with one thing, it breaks the other. Oh well for now.
 682     #
 683     # 2. We can route 10.5.3.0/24 out of the mail nn and nat it into wghole.
 684     #
 685     # 3. We can setup the routing to happen on li, which seemed like I
 686     # just needed to add 10.8.0.4/24 to AllowedIPs in at least the
 687     # wghole clients, but I think that is kind of hacky and breaks ipv4
 688     # routing within the mailvpn, it happened to work just because exim
 689     # prefers ipv6 and that was also available in the mailvpn.
 690     #
 691     # 4. Put the hole interface into the mail network namespace. This
 692     # doesn't work if the mail vpn is wg.  For openvpn, it bypasses the
 693     # vpn routing and establishes a direct connection.  I only use the
 694     # hole vpn for randomish things, it should be fine to join the mail
 695     # nn for that. There should be some way to fix the routing issue
 696     # by doing manual routing, but that doesn't seem like a good use of time.
 697     # relevant:
 698     # https://www.wireguard.com/netns/#
 699     #
 700     # for wireguard debugging
 701     # echo module wireguard +p > /sys/kernel/debug/dynamic_debug/control
 702     # dmesg -w
 703
 704     ;;&
 705   $MAIL_HOST|bk)
 706     for unit in ${nn_progs[@]}; do
 707       i /etc/systemd/system/$unit.service.d/nn.conf <<EOF
 708 [Unit]
 709 # commented for old openvpn
 710 Requires=$vpnser
 711 After=network.target mailnn.service $vpnser
 712 JoinsNamespaceOf=mailnn.service
 713 BindsTo=mailnn.service
 714 StartLimitIntervalSec=0
 715
 716 [Service]
 717 PrivateNetwork=true
 718 # note the nsswitch bind is actually not needed for bk, but
 719 # its the same file so it does no harm.
 720 BindPaths=$bindpaths
 721
 722 Restart=always
 723 RestartSec=20
 724 EOF
 725     done
 726     ;;
 727   *)
 728     for unit in exim4 spamassassin dovecot unbound; do
 729       f=/etc/systemd/system/$unit.service.d/nn.conf
 730       if [[ -s $f ]]; then
 731         rm -fv $f
 732         reload=true
 733       fi
 734     done
 735     ;;
 736 esac
 737
 738 # * spamassassin config
 739 i /etc/sysctl.d/80-iank-mail.conf <<'EOF'
 740 # see exim spec
 741 net.netfilter.nf_conntrack_tcp_timeout_close_wait = 120
 742 EOF
 743 if $ir; then
 744   m sysctl -p
 745 fi
 746
 747 i /etc/spamassassin/mylocal.cf <<'EOF'
 748 # this is mylocal.cf because the normal local.cf has a bunch of upstream stuff i dont want to mess with
 749
 750 # /usr/share/doc/exim4-base/README.Debian.gz:
 751 #   SpamAssassin's default report should not be used in a add_header
 752 #   statement since it contains empty lines. (This triggers e.g. Amavis'
 753 #   warning "BAD HEADER SECTION, Improper folded header field made up
 754 #   entirely of whitespace".) This is a safe, terse alternative:
 755 clear_report_template
 756 report (_SCORE_ / _REQD_ requ) _TESTSSCORES(,)_ autolearn=_AUTOLEARN
 757 uridnsbl_skip_domain iankelling.org
 758 uridnsbl_skip_domain amnimal.ninja
 759 uridnsbl_skip_domain expertpathologyreview.com
 760 uridnsbl_skip_domain zroe.org
 761 EOF
 762
 763 # 2020-10-19 remove old file. remove this when all hosts updated
 764 rm -fv /etc/systemd/system/spamddnsfix.{timer,service}
 765
 766 i /etc/default/spamassassin <<'EOF'
 767 # defaults plus debugging flags for an issue im having
 768 OPTIONS="--create-prefs --max-children 5 --helper-home-dir"
 769 PIDFILE="/var/run/spamd.pid"
 770 # my additions
 771 NICE="--nicelevel 15"
 772 CRON=1
 773 EOF
 774 #####   end spamassassin config
 775
 776
 777 # * Update mail cert
 778 if [[ -e /p/c/filesystem ]]; then
 779   # note, man openvpn implies we could just call mail-route on vpn startup/shutdown with
 780   # systemd, buuut it can remake the tun device unexpectedly, i got this in the log
 781   # after my internet was down for a bit:
 782   # NOTE: Pulled options changed on restart, will need to close and reopen TUN/TAP device.
 783   m /a/exe/vpn-mk-client-cert -b mailclient -n mail li.iankelling.org
 784 fi
 785 case $HOSTNAME in
 786   bk)
 787     if [[ ! -e /etc/openvpn/client/mail.conf ]]; then
 788       echo "$0: error: first, on a system with /p/c/filesystem, run mail-setup, or the vpn-mk-client-cert line above this err" 2>&2
 789       exit 1
 790     fi
 791     ;;
 792 esac
 793
 794 m rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/mail-cert-cron /usr/local/bin
 795
 796 i /etc/systemd/system/mailcert.service <<'EOF'
 797 [Unit]
 798 Description=Mail cert rsync
 799 After=multi-user.target
 800
 801 [Service]
 802 Type=oneshot
 803 ExecStart=/usr/local/bin/sysd-mail-once mailcert /usr/local/bin/mail-cert-cron
 804 EOF
 805 i /etc/systemd/system/mailcert.timer <<'EOF'
 806 [Unit]
 807 Description=Run mail-cert once a day
 808
 809 [Timer]
 810 OnCalendar=daily
 811
 812 [Install]
 813 WantedBy=timers.target
 814 EOF
 815
 816
 817 wghost=${HOSTNAME}wg.b8.nz
 818 if $bhost_t && [[ ! -e /etc/exim4/certs/$wghost/privkey.pem ]]; then
 819   certbot -n --manual-public-ip-logging-ok --eff-email --agree-tos -m letsencrypt@iankelling.org \
 820           certonly --manual --preferred-challenges=dns \
 821           --manual-auth-hook /a/bin/ds/le-dns-challenge \
 822           --manual-cleanup-hook /a/bin/ds/le-dns-challenge-cleanup \
 823           --deploy-hook /a/bin/ds/le-exim-deploy -d $wghost
 824 fi
 825
 826 # * fail2ban
 827
 828 # todo: test that these configs actually work, eg run
 829 # s iptables-exim -S
 830 # and see someone is banned.
 831
 832 sed 's/^ *before *= *iptables-common.conf/before = iptables-common-exim.conf/' \
 833     /etc/fail2ban/action.d/iptables-multiport.conf| i /etc/fail2ban/action.d/iptables-exim.conf
 834 i /etc/fail2ban/action.d/iptables-common-exim.conf <<'EOF'
 835 # iank: same as iptables-common, except iptables is iptables-exim, ip6tables is ip6tables-exim
 836
 837 # Fail2Ban configuration file
 838 #
 839 # Author: Daniel Black
 840 #
 841 # This is a included configuration file and includes the definitions for the iptables
 842 # used in all iptables based actions by default.
 843 #
 844 # The user can override the defaults in iptables-common.local
 845 #
 846 # Modified: Alexander Koeppe <format_c@online.de>, Serg G. Brester <serg.brester@sebres.de>
 847 #       made config file IPv6 capable (see new section Init?family=inet6)
 848
 849 [INCLUDES]
 850
 851 after = iptables-blocktype.local
 852         iptables-common.local
 853 # iptables-blocktype.local is obsolete
 854
 855 [Definition]
 856
 857 # Option:  actionflush
 858 # Notes.:  command executed once to flush IPS, by shutdown (resp. by stop of the jail or this action)
 859 # Values:  CMD
 860 #
 861 actionflush = <iptables> -F f2b-<name>
 862
 863
 864 [Init]
 865
 866 # Option:  chain
 867 # Notes    specifies the iptables chain to which the Fail2Ban rules should be
 868 #          added
 869 # Values:  STRING  Default: INPUT
 870 chain = INPUT
 871
 872 # Default name of the chain
 873 #
 874 name = default
 875
 876 # Option:  port
 877 # Notes.:  specifies port to monitor
 878 # Values:  [ NUM | STRING ]  Default:
 879 #
 880 port = ssh
 881
 882 # Option:  protocol
 883 # Notes.:  internally used by config reader for interpolations.
 884 # Values:  [ tcp | udp | icmp | all ] Default: tcp
 885 #
 886 protocol = tcp
 887
 888 # Option:  blocktype
 889 # Note:    This is what the action does with rules. This can be any jump target
 890 #          as per the iptables man page (section 8). Common values are DROP
 891 #          REJECT, REJECT --reject-with icmp-port-unreachable
 892 # Values:  STRING
 893 blocktype = REJECT --reject-with icmp-port-unreachable
 894
 895 # Option:  returntype
 896 # Note:    This is the default rule on "actionstart". This should be RETURN
 897 #          in all (blocking) actions, except REJECT in allowing actions.
 898 # Values:  STRING
 899 returntype = RETURN
 900
 901 # Option:  lockingopt
 902 # Notes.:  Option was introduced to iptables to prevent multiple instances from
 903 #          running concurrently and causing irratic behavior.  -w was introduced
 904 #          in iptables 1.4.20, so might be absent on older systems
 905 #          See https://github.com/fail2ban/fail2ban/issues/1122
 906 # Values:  STRING
 907 lockingopt = -w
 908
 909 # Option:  iptables
 910 # Notes.:  Actual command to be executed, including common to all calls options
 911 # Values:  STRING
 912 iptables = /usr/local/bin/iptables-exim <lockingopt>
 913
 914
 915 [Init?family=inet6]
 916
 917 # Option:  blocktype (ipv6)
 918 # Note:    This is what the action does with rules. This can be any jump target
 919 #          as per the iptables man page (section 8). Common values are DROP
 920 #          REJECT, REJECT --reject-with icmp6-port-unreachable
 921 # Values:  STRING
 922 blocktype = REJECT --reject-with icmp6-port-unreachable
 923
 924 # Option:  iptables (ipv6)
 925 # Notes.:  Actual command to be executed, including common to all calls options
 926 # Values:  STRING
 927 iptables = /usr/local/bin/ip6tables-exim <lockingopt>
 928 EOF
 929
 930 i /etc/fail2ban/jail.d/exim.local <<'EOF'
 931 [exim]
 932 enabled  = true
 933 port     = 25,587
 934 filter   = exim
 935 banaction = iptables-exim
 936 EOF
 937 if $ir; then
 938   m systemctl restart fail2ban
 939 fi
 940
 941 # * common exim4 config
 942
 943
 944 ## old, not using forward files anymore
 945 rm -fv $uhome/.forward /root/.forward
 946
 947
 948 # Make all system users be aliases. preventative
 949 # prevents things like cron mail for user without alias
 950 awk 'BEGIN { FS = ":" } ; $6 !~ /^\/home/ || $7 ~ /\/nologin$/  { print $1 }' /etc/passwd| while read -r user; do
 951   if [[ ! $user ]]; then
 952     continue
 953   fi
 954   if ! grep -q "^$user:" /etc/aliases; then
 955     echo "$user: root" |m tee -a /etc/aliases
 956   fi
 957 done
 958
 959
 960 awk 'BEGIN { FS = ":" } ; $6 ~ /^\/home/ && $7 !~ /\/nologin$/ { print $1 }' /etc/passwd| while read -r user; do
 961   case $HOSTNAME in
 962     $MAIL_HOST)
 963       sed -i "/^user:/d" /etc/aliases
 964       ;;
 965     *)
 966       if ! grep -q "^$user:" /etc/aliases; then
 967         echo "$user: root" |m tee -a /etc/aliases
 968       fi
 969       ;;
 970   esac
 971 done
 972
 973 if ! grep -q "^ncsoft:" /etc/aliases; then
 974   echo "ncsoft: graceq2323@gmail.com" |m tee -a /etc/aliases
 975 fi
 976
 977
 978
 979 m gpasswd -a iank adm #needed for reading logs
 980
 981 ### make local bounces go to normal maildir
 982 # local mail that bounces goes to /Maildir or /root/Maildir
 983 dirs=(/m/md/bounces/{cur,tmp,new})
 984 m mkdir -p ${dirs[@]}
 985 m chown iank:iank /m /m/md
 986 m ln -sfT /m/md /m/iank
 987 m chmod 771 /m /m/md
 988 m chown -R $u:Debian-exim /m/md/bounces
 989 m chmod 775 ${dirs[@]}
 990 m usermod -a -G Debian-exim $u
 991 for d in /Maildir /root/Maildir; do
 992   if [[ ! -L $d ]]; then
 993     m rm -rf $d
 994   fi
 995   m ln -sf -T /m/md/bounces $d
 996 done
 997
 998 # dkim, client passwd file
 999 files=(/p/c/machine_specific/$HOSTNAME/filesystem/etc/exim4/*)
1000 f=/p/c/filesystem/etc/exim4/passwd.client
1001 if [[ -e $f ]]; then
1002   files+=($f)
1003 fi
1004 if (( ${#files[@]} )); then
1005   m rsync -ahhi --chown=root:Debian-exim --chmod=0640 \
1006     ${files[@]} /etc/exim4
1007 fi
1008
1009 # By default, only 10 days of logs are kept. increase that.
1010 # And dont compress, I look back at logs too often and
1011 # dont need the annoyance of decompressing them all the time.
1012 m sed -ri '/^\s*compress\s*$/d;s/^(\s*rotate\s).*/\11000/' /etc/logrotate.d/exim4-base
1013 files=(/var/log/exim4/*.gz)
1014 if (( ${#files[@]} )); then
1015   gunzip ${files[@]}
1016 fi
1017
1018 ## disabled. not using .forward files, but this is still interesting
1019 ## for reference.
1020 # ## https://blog.dhampir.no/content/make-exim4-on-debian-respect-forward-and-etcaliases-when-using-a-smarthost
1021 # # i only need .forwards, so just doing that one.
1022 # cd /etc/exim4/conf.d/router
1023 # b=userforward_higher_priority
1024 # # replace the router name so it is unique
1025 # sed -r s/^\\S+:/$b:/ 600_exim4-config_userforward >175_$b
1026 rm -fv /etc/exim4/conf.d/router/175_userforward_higher_priority
1027
1028 # todo, consider 'separate' in etc/exim4.conf, could it help on busy systems?
1029
1030 # alerts is basically the postmaster address
1031 m sed -i --follow-symlinks -f - /etc/aliases <<EOF
1032 \$a root: alerts@iankelling.org
1033 /^root:/d
1034 EOF
1035
1036 cat >/etc/exim4/conf.d/rewrite/34_iank_rewriting <<'EOF'
1037 ncsoft@zroe.org graceq2323@gmail.com hE
1038 EOF
1039
1040 # old name
1041 rm -fv /etc/exim4/conf.d/retry/37_retry
1042
1043 cat >/etc/exim4/conf.d/retry/17_retry <<'EOF'
1044 # Retry fast for my own domains
1045 iankelling.org * F,1d,10m;F,14d,1h
1046 amnimal.ninja * F,1d,10m;F,14d,1h
1047 expertpathologyreview.com * F,1d,10m;F,14d,1h
1048 je.b8.nz * F,1d,10m;F,14d,1h
1049 zroe.org * F,1d,10m;F,14d,1h
1050 eximbackup.b8.nz * F,1d,4m;F,14d,1h
1051 EOF
1052
1053
1054 rm -vf /etc/exim4/conf.d/main/000_localmacros # old filename
1055
1056 # separate file so without quoted EOF for convenience
1057 cat >/etc/exim4/conf.d/main/000_local2 <<EOF
1058 # normally empty, I set this so I can set the envelope address
1059 # when doing mail redelivery to invoke filters. Also allows
1060 # me exiqgrep and stuff.
1061 MAIN_TRUSTED_GROUPS = $u
1062 EOF
1063
1064 cat >/etc/exim4/conf.d/main/000_local <<'EOF'
1065 MAIN_TLS_ENABLE = true
1066
1067 # require tls connections for all smarthosts
1068 REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS = *
1069
1070 # debian exim config added this in 2016 or so?
1071 # it's part of the smtp spec, to limit lines to 998 chars
1072 # but a fair amount of legit mail does not adhere to it. I don't think
1073 # this should be default, like it says in
1074 # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=828801
1075 # todo: the bug for introducing this was about headers, but
1076 # the fix maybe is for all lines? one says gmail rejects, the
1077 # other says gmail does not reject. figure out and open a new bug.
1078 IGNORE_SMTP_LINE_LENGTH_LIMIT = true
1079
1080 # more verbose logs
1081 MAIN_LOG_SELECTOR = +all
1082
1083 # Based on spec, seems like a good idea to be nice.
1084 smtp_return_error_details = true
1085
1086 # default is 10. when exim has been down for a bit, fsf mailserver
1087 # will do a big send in one connection, then exim decides to put
1088 # the messages in the queue instead of delivering them, to avoid
1089 # spawning too many delivery processes. This is the same as the
1090 # fsfs value. And the corresponding one for how many messages
1091 # to send out in 1 connection remote_max_parallel = 256
1092 smtp_accept_queue_per_connection = 500
1093
1094
1095 DKIM_CANON = relaxed
1096 DKIM_SELECTOR = li
1097
1098 # from comments in
1099 # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
1100 # and its best for this to align https://tools.ietf.org/html/rfc7489#page-8
1101 # There could be some circumstance when the
1102 # from: isnt our domain, but the envelope sender is
1103 # and so still want to sign, but I cant think of any case.
1104 DKIM_DOMAIN = ${lc:${domain:$rh_from:}}
1105 # The file is based on the outgoing domain-name in the from-header.
1106 # sign if key exists
1107 DKIM_PRIVATE_KEY = ${if exists{/etc/exim4/${dkim_domain}-private.pem} {/etc/exim4/${dkim_domain}-private.pem}}
1108
1109 # most of the ones that gmail seems to use.
1110 # Exim has horrible default of signing unincluded
1111 # list- headers since they got mentioned in an
1112 # rfc, but this messes up mailing lists, like gnu/debian which want to
1113 # keep your dkim signature intact but add list- headers.
1114 DKIM_SIGN_HEADERS = mime-version:in-reply-to:references:from:date:subject:to
1115
1116 domainlist local_hostnames = ! je.b8.nz : ! bk.b8.nz : *.b8.nz : b8.nz
1117
1118 hostlist iank_trusted = <; \\
1119 # veth0
1120 10.173.8.1 ; \\
1121 # li li_ip6
1122 72.14.176.105 ; 2600:3c00::f03c:91ff:fe6d:baf8 ; \\
1123 # li_vpn_net li_vpn_net_ip6s
1124 10.8.0.0/24; 2600:3c00:e000:280::/64 ; 2600:3c00:e002:3800::/56 ;  \\
1125 # bk bk_ip6
1126 85.119.83.50 ; 2001:ba8:1f1:f0c9::2 ; \\
1127 # je je_ipv6
1128 85.119.82.128 ; 2001:ba8:1f1:f09d::2 ; \\
1129 # fsf_mit_net fsf_mit_net_ip6 fsf_net fsf_net_ip6 fsf_office_net
1130 18.4.89.0/24 ; 2603:3005:71a:2e00::/64 ; 209.51.188.0/24 ; 2001:470:142::/48 ; 74.94.156.208/28
1131
1132
1133 # this is the default delay_warning_condition, plus matching on local_domains.
1134 # If I have some problem with my local system that causes delayed delivery,
1135 # I dont want to send warnings out to non-local domains.
1136 delay_warning_condition = ${if or {\
1137   { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} }\
1138   { match{$h_precedence:}{(?i)bulk|list|junk} }\
1139   { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} }\
1140   { match_domain{$domain}{+local_domains} }\
1141   } {no}{yes}}
1142
1143
1144 EOF
1145
1146 rm -fv /etc/exim4/rcpt_local_acl # old path
1147
1148 i /etc/exim4/conf.d/local_deny_exceptions_acl <<'EOF'
1149 # This acl already exists in rcpt, this just makes it more widespread.
1150 # See the comment there for its rationale. The reason it needs to be
1151 # more widespread is that I've turned on sender verification, but cron
1152 # emails can fail sender verification since I may be in a network that
1153 # doesn't have my local dns.
1154 accept
1155   authenticated = *
1156
1157 # i setup a local programs smtp to mail.iankelling.org, this
1158 # skips sender verification for it.
1159 accept
1160   hosts = 10.173.8.1
1161 EOF
1162
1163 rm -fv /etc/exim4/data_local_acl # old path
1164 i /etc/exim4/conf.d/data_local_acl <<'EOF'
1165 # Except for the "condition =", this was
1166 # a comment in the check_data acl. The comment about this not
1167 # being suitable has been changed in newer exim versions. The only thing
1168 # related I found was to
1169 # add the condition =, cuz spamassassin has problems with big
1170 # messages and spammers don't bother with big messages,
1171 # but I've increased the size from 10k
1172 # suggested in official docs, and 100k in the wiki example because
1173 # those docs are rather old and I see a 110k spam message
1174 # pretty quickly looking through my spam folder.
1175
1176 warn
1177   !hosts = +iank_trusted
1178   remove_header = X-Spam_score: X-Spam_score_int : X-Spam_bar : X-Spam_report
1179
1180 warn
1181   !hosts = +iank_trusted
1182   condition = ${if < {$message_size}{5000K}}
1183   spam = Debian-exim:true
1184   add_header = X-Spam_score_int: $spam_score_int
1185   add_header = X-Spam_score: $spam_score
1186   add_header = X-Spam_bar: $spam_bar
1187   add_header = X-Spam_report: $spam_report
1188   add_header = X-Spam_action: $spam_action
1189
1190 warn
1191   condition = ${if def:malware_name}
1192   remove_header = Subject:
1193   add_header = Subject: [Clamav warning: $malware_name] $h_subject
1194   log_message = heuristic malware warning: $malware_name
1195
1196 #accept
1197 #  spf = pass:fail:softfail:none:neutral:permerror:temperror
1198 #  dmarc_status = reject:quarantine
1199 #  add_header = Reply-to: dmarctest@iankelling.org
1200
1201 EOF
1202
1203 i /etc/exim4/conf.d/router/900_exim4-config_local_user <<'EOF'
1204 ### router/900_exim4-config_local_user
1205 #################################
1206
1207 # This router matches local user mailboxes. If the router fails, the error
1208 # message is "Unknown user".
1209 local_user:
1210   debug_print = "R: local_user for $local_part@$domain"
1211   driver = accept
1212   domains = +local_domains
1213 # ian: default file except where mentioned.
1214 # ian: commented this. I get all local parts. for bk, an rcpt
1215 # check handles checking with dovecot, and the only router
1216 # after this is root.
1217 #  local_parts = ! root
1218   transport = LOCAL_DELIVERY
1219   cannot_route_message = Unknown user
1220 # ian: added for + addressing.
1221   local_part_suffix = +*
1222   local_part_suffix_optional
1223 EOF
1224 i /etc/exim4/conf.d/transport/30_exim4-config_dovecot_lmtp <<'EOF'
1225 dovecot_lmtp:
1226   driver = lmtp
1227   socket = /var/run/dovecot/lmtp
1228   #maximum number of deliveries per batch, default 1
1229   batch_max = 200
1230   envelope_to_add
1231 EOF
1232
1233 i /etc/exim4/conf.d/transport/30_remote_smtp_vpn <<'EOF'
1234 # same as debians 30_exim4-config_remote_smtp, but
1235 # with interface added at the end.
1236
1237 remote_smtp_vpn:
1238   debug_print = "T: remote_smtp_vpn for $local_part@$domain"
1239   driver = smtp
1240 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
1241   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
1242 .endif
1243 .ifdef REMOTE_SMTP_HOSTS_AVOID_TLS
1244   hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
1245 .endif
1246 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1247   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1248 .endif
1249 .ifdef REMOTE_SMTP_RETURN_PATH
1250   return_path = REMOTE_SMTP_RETURN_PATH
1251 .endif
1252 .ifdef REMOTE_SMTP_HELO_DATA
1253   helo_data=REMOTE_SMTP_HELO_DATA
1254 .endif
1255 .ifdef DKIM_DOMAIN
1256 dkim_domain = DKIM_DOMAIN
1257 .endif
1258 .ifdef DKIM_SELECTOR
1259 dkim_selector = DKIM_SELECTOR
1260 .endif
1261 .ifdef DKIM_PRIVATE_KEY
1262 dkim_private_key = DKIM_PRIVATE_KEY
1263 .endif
1264 .ifdef DKIM_CANON
1265 dkim_canon = DKIM_CANON
1266 .endif
1267 .ifdef DKIM_STRICT
1268 dkim_strict = DKIM_STRICT
1269 .endif
1270 .ifdef DKIM_SIGN_HEADERS
1271 dkim_sign_headers = DKIM_SIGN_HEADERS
1272 .endif
1273 .ifdef TLS_DH_MIN_BITS
1274 tls_dh_min_bits = TLS_DH_MIN_BITS
1275 .endif
1276 .ifdef REMOTE_SMTP_TLS_CERTIFICATE
1277 tls_certificate = REMOTE_SMTP_TLS_CERTIFICATE
1278 .endif
1279 .ifdef REMOTE_SMTP_PRIVATEKEY
1280 tls_privatekey = REMOTE_SMTP_PRIVATEKEY
1281 .endif
1282 .ifdef REMOTE_SMTP_HOSTS_REQUIRE_TLS
1283   hosts_require_tls = REMOTE_SMTP_HOSTS_REQUIRE_TLS
1284 .endif
1285 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1286   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1287 .endif
1288   interface = <; 10.8.0.4 ; 2600:3c00:e002:3800::4
1289 EOF
1290
1291 i /etc/exim4/conf.d/transport/30_smarthost_dkim <<'EOF'
1292 # ian: this is remote_smtp_smarthost plus the dkim parts from remote_smtp
1293
1294 smarthost_dkim:
1295   debug_print = "T: remote_smtp_smarthost for $local_part@$domain"
1296   driver = smtp
1297   multi_domain
1298 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
1299   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
1300 .endif
1301   hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \
1302         {\
1303         ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\
1304         }\
1305         {} \
1306       }
1307 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1308   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1309 .endif
1310 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1311   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1312 .endif
1313 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1314   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1315 .endif
1316 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1317   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
1318 .endif
1319 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1320   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1321 .endif
1322 .ifdef REMOTE_SMTP_RETURN_PATH
1323   return_path = REMOTE_SMTP_RETURN_PATH
1324 .endif
1325 .ifdef REMOTE_SMTP_HELO_DATA
1326   helo_data=REMOTE_SMTP_HELO_DATA
1327 .endif
1328 .ifdef TLS_DH_MIN_BITS
1329 tls_dh_min_bits = TLS_DH_MIN_BITS
1330 .endif
1331 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1332 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1333 .endif
1334 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1335 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1336 .endif
1337 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1338   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1339 .endif
1340 .ifdef DKIM_DOMAIN
1341 dkim_domain = DKIM_DOMAIN
1342 .endif
1343 .ifdef DKIM_SELECTOR
1344 dkim_selector = DKIM_SELECTOR
1345 .endif
1346 .ifdef DKIM_PRIVATE_KEY
1347 dkim_private_key = DKIM_PRIVATE_KEY
1348 .endif
1349 .ifdef DKIM_CANON
1350 dkim_canon = DKIM_CANON
1351 .endif
1352 .ifdef DKIM_STRICT
1353 dkim_strict = DKIM_STRICT
1354 .endif
1355 .ifdef DKIM_SIGN_HEADERS
1356 dkim_sign_headers = DKIM_SIGN_HEADERS
1357 .endif
1358 EOF
1359
1360
1361 cat >/etc/exim4/update-exim4.conf.conf  <<'EOF'
1362 # default stuff, i havent checked if its needed
1363 dc_minimaldns='false'
1364 dc_relay_nets=''
1365 CFILEMODE='644'
1366 dc_use_split_config='true'
1367 dc_mailname_in_oh='true'
1368 EOF
1369
1370
1371 # * radicale
1372 if mailhost; then
1373   if ! mountpoint /o; then
1374     echo "error /o is not a mountpoint" >&2
1375     exit 1
1376   fi
1377
1378   # davx/davdroid setup instructions at the bottom
1379
1380   # main docs:
1381   # http://radicale.org/user_documentation/
1382   # https://davdroid.bitfire.at/configuration/
1383
1384   # note on debugging: if radicale can't bind to the address,
1385   # in the log it just says "Starting Radicale". If you run
1386   # it in the foreground, it will give more info. Background
1387   # plus debug does not help.
1388   # sudo -u radicale radicale -D -f
1389
1390   # created password file with:
1391   # htpasswd -c /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1392   # chmod 640 /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1393   # # setup chgrp www-data in ./conflink
1394
1395   pi-nostart radicale
1396
1397   i /etc/systemd/system/radicale.service.d/override.conf <<EOF
1398 [Unit]
1399 # this unit is configured to start and stop whenever
1400 # $vpnser does
1401
1402 After=network.target network-online.target mailnn.service $vpnser
1403 BindsTo=$vpnser
1404
1405 Wants=network-online.target
1406 JoinsNamespaceOf=mailnn.service
1407 StartLimitIntervalSec=0
1408
1409 [Service]
1410 PrivateNetwork=true
1411 BindPaths=$bindpaths
1412 Restart=always
1413 # time to sleep before restarting a service
1414 RestartSec=20
1415
1416 [Install]
1417 # for openvpn
1418 RequiredBy=$vpnser
1419 EOF
1420
1421
1422   # use persistent uid/gid
1423   IFS=:; read -r _ _ uid _ < <(getent passwd radicale ); unset IFS
1424   IFS=:; read -r _ _ gid _ < <(getent group radicale ); unset IFS
1425   if [[ $uid != 609 ]]; then
1426     m systemctl stop radicale ||:
1427     m usermod -u 609 radicale
1428     m groupmod -g 609 radicale
1429     m usermod -g 609 radicale
1430   fi
1431   m find /o/radicale  -xdev -exec chown -h 609 {} +
1432   m find /o/radicale -xdev -exec chgrp -h 609 {} +
1433
1434
1435   # I moved /var/lib/radicale after it's initialization.
1436   # I did a sudo -u radicale git init in the collections subfolder
1437   # after it gets created, per the git docs.
1438   m /a/exe/lnf -T /o/radicale /var/lib/radicale
1439
1440   # from https://www.williamjbowman.com/blog/2015/07/24/setting-up-webdav-caldav-and-carddav-servers/
1441
1442   # more config is for li in distro-end
1443
1444   # coment in this file says this is needed for it to run on startup
1445   sed -ri 's/^\s*#+\s*(ENABLE_RADICALE\s*=\s*yes\s*)/\1/' /etc/default/radicale
1446
1447   # comments say default is 0.0.0.0:5232
1448   m setini hosts 10.8.0.4:5232 server
1449   # https://radicale.org/2.1.html
1450   m setini type http_x_remote_user auth
1451
1452
1453   # disable power management feature, set to 240 min sync interval,
1454   # so it shouldn't be bad.
1455
1456   # davdroid from f-druid.
1457   # login with url and user name
1458   # url https://cal.iankelling.org/ian
1459   # username ian
1460   # pass, see password manager for radicale
1461   #
1462   # add account dialog:
1463   #
1464   # set account name as ian@iankelling.org, per help text below the
1465   # field.
1466   #
1467   # switch to groups are per-contact categories,
1468   # per https://davdroid.bitfire.at/configuration/radicale/
1469   #
1470   #
1471   # After setting up account, I added one address book, named
1472   # ianaddr. calender was already created, named ian. checked boxes under
1473   # both. synced.
1474   #
1475   # To restore from old phone to new phone, I wiped all data out, then copied over the newly created files. I think
1476   #
1477   # ignorable background info:
1478   #
1479   # opentasks uses the calendar file.
1480   #
1481   # The address book I created got a uuid as a name for the file. Note
1482   # the .props file says if it's a calendar or addressbook.
1483   #
1484   # When debugging, tailed /var/log/radicale/radicale.log and apache log,
1485   # both show the requests happening. Without creating the address book,
1486   # after creating a contact, a sync would delete it.
1487   #
1488   # Address books correspond to .props files in the radicale dir.
1489   #
1490   #  Some background is here,
1491   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1492   # which shows separate vcard option is from rfc 6350, the other is 2426,
1493   # radicale page says it implements the former not the latter,
1494   # which conflicts with the documentation of which to select, but whatever.
1495   # http://radicale.org/technical_choices/
1496   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1497   #
1498   # Note, url above says only cayanogenmod 13+ and omnirom can manage groups.
1499
1500   # Note, radicale had built-in git support to track changes, but they
1501   # removed it in 2.0.
1502
1503 fi
1504
1505 # * dovecot
1506
1507 # ** $MAIL_HOST|bk|je)
1508 case $HOSTNAME in
1509   $MAIL_HOST|bk|je)
1510     # based on a little google and package search, just the dovecot
1511     # packages we need instead of dovecot-common.
1512     #
1513     # dovecot-lmtpd is for exim to deliver to dovecot instead of maildir
1514     # directly.  The reason to do this is to use dovecot\'s sieve, which
1515     # can generally do more than exims filters (a few things less) and
1516     # sieve has the benefit of being supported in postfix and
1517     # proprietary/weird environments, so there is more examples on the
1518     # internet.
1519     pi dovecot-core dovecot-imapd dovecot-sieve dovecot-lmtpd dovecot-sqlite sqlite3
1520
1521     for f in /p/c{/machine_specific/$HOSTNAME,}/filesystem/etc/dovecot/users; do
1522       if [[ -e $f ]]; then
1523         m rsync -ahhi --chown=root:dovecot --chmod=0640 $f /etc/dovecot/
1524         break
1525       fi
1526     done
1527     for f in /p/c/subdir_files/sieve/*sieve /a/bin/ds/subdir_files/sieve/*sieve; do
1528       m sudo -u $u /a/exe/lnf -v -T $f $uhome/sieve/${f##*/}
1529     done
1530
1531     # https://wiki.dovecot.org/SSL/DovecotConfiguration
1532     i /etc/dovecot/dhparam <<'EOF'
1533 -----BEGIN DH PARAMETERS-----
1534 MIIBCAKCAQEAoleil6SBxGqQKk7j0y2vV3Oklv6XupZKn7PkPv485QuFeFagifeS
1535 A+Jz6Wquqk5zhGyCu63Hp4wzGs4TyQqoLjkaWL6Ra/Bw3g3ofPEzMGEsV1Qdqde4
1536 jorwiwtr2i9E6TXQp0noT/7VFeHulIkayTeW8JulINdMHs+oLylv16McGCIrxbkM
1537 8D1PuO0TP/CNDs2QbRvJ1RjY3CeGpxMhrSHVgBCUMwnA2cvz3bYjI7UMYMMDPNrE
1538 PLrwsYzXGGCdJsO2vsmmqqgLsZiapYJlUNjfiyWLt7E2H6WzkNB3VIhIPfLqFDPK
1539 xioE3sYKdjOt+p6mlg3l8+OLtODEFPHDqwIBAg==
1540 -----END DH PARAMETERS-----
1541 EOF
1542     {
1543       if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
1544         cat <<'EOF'
1545 ssl_cert = </etc/exim4/fullchain.pem
1546 ssl_key = </etc/exim4/privkey.pem
1547 EOF
1548       else
1549         cat <<'EOF'
1550 ssl_cert = </etc/exim4/exim.crt
1551 ssl_key = </etc/exim4/exim.key
1552 EOF
1553       fi
1554       cat <<'EOF'
1555 # https://ssl-config.mozilla.org
1556 ssl = required
1557 # this is the same as the certbot list, in my cert cronjob, I check if that has changed upstream.
1558 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
1559 ssl_protocols = TLSv1.2
1560 ssl_prefer_server_ciphers = no
1561
1562 protocol lmtp {
1563 #per https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
1564 # default is just $mail_plugins
1565   mail_plugins = $mail_plugins sieve
1566 }
1567 EOF
1568       if dpkg --compare-versions $(dpkg-query -f='${Version}\n' --show dovecot-core) ge 1:2.3; then
1569         cat <<EOF
1570 ssl_dh = </etc/dovecot/dhparam
1571 EOF
1572       fi
1573     } >/etc/dovecot/local.conf
1574
1575     ;;&
1576
1577   # **  $MAIL_HOST)
1578   $MAIL_HOST)
1579     # If we changed 90-sieve.conf and removed the active part of the
1580     # sieve option, we wouldn\'t need this, but I\'d rather not modify a
1581     # default config if not needed. This won\'t work as a symlink in /a/c
1582     # unfortunately.
1583     m sudo -u $u /a/exe/lnf -T sieve/main.sieve $uhome/.dovecot.sieve
1584
1585     if [[ ! -e $uhome/sieve/personal.sieve ]]; then
1586       m touch $uhome/sieve/personal{,end}{,test}.sieve
1587     fi
1588
1589     rm -fv /etc/dovecot/conf.d/20-lmtp.conf # file from prev version
1590     cat >>/etc/dovecot/local.conf <<EOF
1591 # simple password file based login
1592 !include conf.d/auth-passwdfile.conf.ext
1593
1594 # ian: %u is used for alerts user vs iank
1595 mail_location = maildir:/m/%u:LAYOUT=fs:INBOX=/m/%u/INBOX
1596 mail_uid = $u
1597 mail_gid = $u
1598
1599 protocol lmtp {
1600 # For a normal setup with exim, we need something like this, which
1601 # removes the domain part
1602 #  auth_username_format = %Ln
1603 #
1604 #  or else # Exim says something like
1605 #  "LMTP error after RCPT ... 550 ... User doesn't exist someuser@somedomain"
1606 # Dovecot verbose log says something like
1607 # "auth-worker(9048): passwd(someuser@somedomain): unknown user"
1608 # reference: http://wiki.dovecot.org/LMTP/Exim
1609 #
1610 # However, I use this to direct all mail to the same inbox.
1611 # A normal way to do this, which I did at first is to have
1612 # a router in exim almost at the end, eg 950,
1613 #local_catchall:
1614 #  debug_print = "R: catchall for \$local_part@\$domain"
1615 #  driver = redirect
1616 #  domains = +local_domains
1617 #  data = $u
1618 # based on
1619 # http://blog.alteholz.eu/2015/04/exim4-and-catchall-email-address/
1620 # with superflous options removed.
1621 # However, this causes the envelope to be rewritten,
1622 # which makes filtering into mailboxes a little less robust or more complicated,
1623 # so I've done it this way instead. it also requires
1624 # modifying the local router in exim.
1625   auth_username_format = $u
1626 }
1627 EOF
1628     ;;&
1629   # **  bk|je)
1630   bk|je)
1631     chown -R mail.mail /m/md
1632
1633     f=/etc/dovecot/conf.d/10-auth.conf
1634     if [[ -e $f ]]; then
1635       mv $f $f-iank-disabled
1636     fi
1637
1638     cat >>/etc/dovecot/local.conf <<EOF
1639 !include /etc/dovecot/local.conf.ext
1640
1641 # for debugging info, uncomment these.
1642 # logs go to syslog and to /var/log/mail.log
1643 #auth_verbose=yes
1644 #mail_debug=yes
1645
1646
1647 protocol lmtp {
1648 # This downcases the localpart. default is case sensitive.
1649 # case sensitive local part will miss out on valid email when some person or system
1650 # mistakenly capitalizes things.
1651   auth_username_format = %Lu
1652 }
1653
1654 # make 147 only listen on localhost, plan to use for nextcloud.
1655 # copied from mailinabox
1656 service imap-login {
1657   inet_listener imap {
1658     address = 127.0.0.1
1659   }
1660 }
1661 # https://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_dovecot_authenticator.html
1662 service auth {
1663   unix_listener auth-client {
1664     user = Debian-exim
1665     group = Debian-exim
1666   }
1667 }
1668
1669
1670 plugin {
1671   sieve_before = /etc/dovecot/sieve-spam.sieve
1672   # from mailinabox
1673   sieve = /m/sieve/%d/%n.sieve
1674   sieve_dir = /m/sieve/%d/%n
1675 }
1676
1677
1678 # all taken from mailinabox.
1679 mail_location = maildir:/m/md/%d/%n
1680 # meh, ok.
1681 mail_privileged_group = mail
1682 # By default Dovecot allows users to log in only with UID numbers 500 and above. mail is 8
1683 first_valid_uid = 1
1684
1685 # todo: test these changes in the universal config
1686 # mailboxes taken from mailinabox but removed
1687 # settings duplicate to defaults
1688 namespace inbox {
1689   mailbox INBOX {
1690     auto = subscribe
1691   }
1692   mailbox Spam {
1693     special_use = \Junk
1694     auto = subscribe
1695   }
1696   mailbox Drafts {
1697     auto = subscribe
1698   }
1699   mailbox Sent {
1700     auto = subscribe
1701   }
1702   mailbox Trash {
1703     auto = subscribe
1704   }
1705   mailbox Archive {
1706     special_use = \Archive
1707     auto = subscribe
1708   }
1709 }
1710 auth_mechanisms = plain login
1711 EOF
1712
1713     i /etc/dovecot/sieve-spam.sieve <<'EOF'
1714 require ["regex", "fileinto", "imap4flags"];
1715
1716 if allof (header :regex "X-Spam-Status" "^Yes") {
1717   fileinto "Spam";
1718   stop;
1719 }
1720 EOF
1721
1722     i /etc/dovecot/local.conf.ext <<'EOF'
1723 passdb {
1724   driver = sql
1725   args = /etc/dovecot/dovecot-sql.conf.ext
1726 }
1727 userdb {
1728   driver = sql
1729   args = /etc/dovecot/dovecot-sql.conf.ext
1730 }
1731
1732 EOF
1733
1734     i /etc/dovecot/dovecot-sql.conf.ext <<'EOF'
1735 # from mailinabox
1736 driver = sqlite
1737 connect = /m/rc/users.sqlite
1738 default_pass_scheme = SHA512-CRYPT
1739 password_query = SELECT email as user, password FROM users WHERE email='%u';
1740 user_query = SELECT email AS user, "mail" as uid, "mail" as gid, "/m/md/%d/%n" as home FROM users WHERE email='%u';
1741 iterate_query = SELECT email AS user FROM users;
1742 EOF
1743     m chmod 0600 /etc/dovecot/dovecot-sql.conf.ext # per Dovecot instructions
1744
1745     # db needs to be in a www-data writable directory
1746     db=/m/rc/users.sqlite
1747     if [[ ! -s $db ]]; then
1748       m mkdir -p /m/rc
1749       m sqlite3 $db <<'EOF'
1750 CREATE TABLE users (
1751 id INTEGER PRIMARY KEY AUTOINCREMENT,
1752 email TEXT NOT NULL UNIQUE,
1753 password TEXT NOT NULL,
1754 extra,
1755 privileges TEXT NOT NULL DEFAULT '');
1756 EOF
1757     fi
1758     # example of adding a user:
1759     # hash: doveadm pw -s SHA512-CRYPT -p passhere
1760     # sqlite3 /m/rc/users.sqlite <<'EOF'
1761     #insert into users (email, password) values ('testignore@bk.b8.nz', 'hash');
1762     #EOF
1763     # update users set password = 'hash' where email = 'testignore@bk.b8.nz';
1764
1765     # this should be at the end since it requires a valid dovecot config
1766     m sievec /etc/dovecot/sieve-spam.sieve
1767     ;;&
1768   # **  bk)
1769   bk)
1770     # roundcube uses this
1771     mkdir -p /m/sieve
1772     chown mail.mail /m/sieve
1773     m pi dovecot-managesieved
1774     ;;
1775 esac
1776
1777 # * thunderbird autoconfig setup
1778
1779 bkdomains=(expertpathologyreview.com amnimal.ninja)
1780 if [[ $HOSTNAME == bk ]]; then
1781   for domain in ${bkdomains[@]}; do
1782     m /a/exe/web-conf apache2 autoconfig.$domain
1783     dir=/var/www/autoconfig.$domain/html/mail
1784     m mkdir -p $dir
1785     # taken from mailinabox
1786     i $dir/config-v1.1.xml <<EOF
1787 <?xml version="1.0" encoding="UTF-8"?>
1788 <clientConfig version="1.1">
1789     <emailProvider id="$domain">
1790       <domain>$domain</domain>
1791
1792       <displayName>$domain Mail</displayName>
1793       <displayShortName>$domain</displayShortName>
1794
1795       <incomingServer type="imap">
1796          <hostname>mail2.iankelling.org</hostname>
1797          <port>993</port>
1798          <socketType>SSL</socketType>
1799          <username>%EMAILADDRESS%</username>
1800          <authentication>password-cleartext</authentication>
1801       </incomingServer>
1802
1803       <outgoingServer type="smtp">
1804          <hostname>mail2.iankelling.org</hostname>
1805          <port>587</port>
1806          <socketType>STARTTLS</socketType>
1807          <username>%EMAILADDRESS%</username>
1808          <authentication>password-cleartext</authentication>
1809          <addThisServer>true</addThisServer>
1810          <useGlobalPreferredServer>false</useGlobalPreferredServer>
1811       </outgoingServer>
1812
1813       <documentation url="https://$domain/">
1814          <descr lang="en">$domain website.</descr>
1815       </documentation>
1816     </emailProvider>
1817
1818     <webMail>
1819       <loginPage url="https://$domain/roundcube" />
1820       <loginPageInfo url="https://$domain/roundcube" >
1821         <username>%EMAILADDRESS%</username>
1822         <usernameField id="rcmloginuser" name="_user" />
1823         <passwordField id="rcmloginpwd" name="_pass" />
1824         <loginButton id="rcmloginsubmit" />
1825       </loginPageInfo>
1826     </webMail>
1827     <clientConfigUpdate url="https://autoconfig.$domain/mail/config-v1.1.xml" />
1828 </clientConfig>
1829 EOF
1830   done
1831 fi
1832
1833 # * roundcube setup
1834
1835 if [[ $HOSTNAME == bk ]]; then
1836
1837   # zip according to /installer
1838   # which requires adding a line to /usr/local/lib/roundcubemail/config/config.inc.php
1839   # $config['enable_installer'] = true;
1840   pi roundcube roundcube-sqlite3 php-zip apache2 php-fpm
1841
1842   ### begin composer install
1843   # https://getcomposer.org/doc/faqs/how-to-install-composer-programmatically.md
1844   # cd $(mktemp -d)
1845   # sum="$(wget -q -O - https://composer.github.io/installer.sig)"
1846   # m php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
1847   # if [[ $sum != $(php -r "echo hash_file('sha384', 'composer-setup.php');") ]]; then
1848   #   echo 'ERROR: Invalid composer installer checksum' >&2
1849   #   rm -fv composer-setup.php
1850   #   exit 1
1851   # fi
1852   # m php composer-setup.php --quiet
1853   # rm -fv composer-setup.php
1854   # m mv composer.phar /usr/local/bin
1855
1856   # the above method gets composer2, carddav plugin at least doesnt work with that
1857   # yet, it was just released 10-24-2020.
1858   m cd /usr/local/bin
1859   m wget -nv -N https://getcomposer.org/composer-1.phar
1860   chmod +x composer-1.phar
1861   ### end composer install
1862
1863   rcdirs=(/usr/local/lib/rcexpertpath /usr/local/lib/rcninja)
1864   ncdirs=(/var/www/ncexpertpath /var/www/ncninja)
1865   # point debian cronjob to our local install, preventing daily cron error
1866
1867   # debian's cronjob will fail, remove both paths it uses just to be sure
1868   rm -fv /usr/share/roundcube/bin/cleandb.sh /etc/cron.d/roundcube-core
1869
1870   #### begin dl roundcube
1871   # note, im r2e subbed to https://github.com/roundcube/roundcubemail/releases.atom
1872   v=1.4.13; f=roundcubemail-$v-complete.tar.gz
1873   cd /a/opt
1874   if [[ -e $f ]]; then
1875     timestamp=$(stat -c %Y $f)
1876   else
1877     timestamp=0
1878   fi
1879   m wget -nv -N https://github.com/roundcube/roundcubemail/releases/download/$v/$f
1880   new_timestamp=$(stat -c %Y $f)
1881   for rcdir in ${rcdirs[@]}; do
1882     if [[ $timestamp != "$new_timestamp" ||  ! -e "$rcdir/config/secret" ]]; then
1883       m tar -C /usr/local/lib --no-same-owner -zxf $f
1884       m rm -rf $rcdir
1885       m mv /usr/local/lib/roundcubemail-$v $rcdir
1886     fi
1887   done
1888   #### end dl roundcube
1889
1890   for ((i=0; i < ${#bkdomains[@]}; i++)); do
1891     domain=${bkdomains[i]}
1892     rcdir=${rcdirs[i]}
1893     rcbase=${rcdir##*/}
1894     ncdir=${ncdirs[i]}
1895
1896     # copied from debians cronjob
1897     i /etc/cron.d/$rcbase <<EOF
1898 #  Roundcube database cleaning: finally removes all records that are
1899 #  marked as deleted.
1900 0   5  *   *   *   www-data $rcdir/bin/cleandb.sh >/dev/null
1901 EOF
1902
1903     m /a/exe/web-conf - apache2 $domain <<EOF
1904 Alias /roundcube $rcdir
1905 ### begin roundcube settings
1906 # taken from /etc/apache2/conf-available/roundcube.conf version 1.4.8+dfsg.1-1~bpo10+1
1907 <Directory $rcdir/>
1908   Options +FollowSymLinks
1909   # This is needed to parse $rcdir/.htaccess.
1910   AllowOverride All
1911   Require all granted
1912 </Directory>
1913 # Protecting basic directories:
1914 <Directory $rcdir/config>
1915   Options -FollowSymLinks
1916   AllowOverride None
1917 </Directory>
1918 ### end roundcube settings
1919
1920
1921 ### begin nextcloud settings
1922 Alias /nextcloud "$ncdir/"
1923 <Directory $ncdir/>
1924   Require all granted
1925   AllowOverride All
1926   Options FollowSymLinks MultiViews
1927
1928   <IfModule mod_dav.c>
1929     Dav off
1930   </IfModule>
1931
1932 </Directory>
1933
1934 # based on install checker, links to
1935 # https://docs.nextcloud.com/server/19/admin_manual/issues/general_troubleshooting.html#service-discovery
1936 # their example was a bit wrong, I figured it out by adding
1937 # LogLevel warn rewrite:trace5
1938 # then watching the apache logs
1939
1940 RewriteEngine on
1941 RewriteRule ^/\.well-known/host-meta /nextcloud/public.php?service=host-meta [QSA,L]
1942 RewriteRule ^/\.well-known/host-meta\.json /nextcloud/public.php?service=host-meta-json [QSA,L]
1943 RewriteRule ^/\.well-known/webfinger /nextcloud/public.php?service=webfinger [QSA,L]
1944 RewriteRule ^/\.well-known/carddav /nextcloud/remote.php/dav/ [R=301,L]
1945 RewriteRule ^/\.well-known/caldav /nextcloud/remote.php/dav/ [R=301,L]
1946 ### end nextcloud settings
1947 EOF
1948     if [[ ! -e $rcdir/config/secret ]]; then
1949       base64 </dev/urandom | head -c24 >$rcdir/config/secret || [[ $? == 141 || ${PIPESTATUS[0]} == 32 ]]
1950     fi
1951     secret=$(cat $rcdir/config/secret)
1952
1953     rclogdir=/var/log/$rcbase
1954     rctmpdir=/var/tmp/$rcbase
1955     rcdb=/m/rc/$rcbase.sqlite
1956     # config from mailinabox
1957     i $rcdir/config/config.inc.php <<EOF
1958 <?php
1959 \$config = array();
1960 # debian creates this for us
1961 \$config['log_dir'] = '$rclogdir/';
1962 # debian also creates a temp dir, but it is under its install dir,
1963 # seems better to have our own.
1964 \$config['temp_dir'] = '$rctmpdir/';
1965 \$config['db_dsnw'] = 'sqlite:///$rcdb?mode=0640';
1966 \$config['default_host'] = 'ssl://localhost';
1967 \$config['default_port'] = 993;
1968 \$config['imap_conn_options'] = array(
1969   'ssl'         => array(
1970      'verify_peer'  => false,
1971      'verify_peer_name'  => false,
1972    ),
1973  );
1974 \$config['imap_timeout'] = 15;
1975 \$config['smtp_server'] = 'tls://127.0.0.1';
1976 \$config['smtp_conn_options'] = array(
1977   'ssl'         => array(
1978      'verify_peer'  => false,
1979      'verify_peer_name'  => false,
1980    ),
1981  );
1982 \$config['product_name'] = 'webmail';
1983 \$config['des_key'] = '$secret';
1984 \$config['plugins'] = array('archive', 'zipdownload', 'password', 'managesieve', 'jqueryui', 'carddav', 'html5_notifier');
1985 \$config['skin'] = 'elastic';
1986 \$config['login_autocomplete'] = 2;
1987 \$config['password_charset'] = 'UTF-8';
1988 \$config['junk_mbox'] = 'Spam';
1989 # disable builtin addressbook
1990 \$config['address_book_type'] = '';
1991 ?>
1992 EOF
1993
1994     m mkdir -p $rclogdir
1995     m chmod 750 $rclogdir
1996     m chown www-data:adm $rclogdir
1997     # note: subscribed to updates:
1998     # r2e add rcmcarddav https://github.com/blind-coder/rcmcarddav/commits/master.atom ian@iankelling.org
1999     # r2e add roundcube https://github.com/roundcube/roundcubemail/releases.atom ian@iankelling.org
2000     m mkdir -p $rctmpdir /m/rc
2001     m chown -R www-data.www-data $rctmpdir /m/rc
2002     m chmod 750 $rctmpdir
2003     # Ensure the log file monitored by fail2ban exists, or else fail2ban can't start.
2004     # todo: check for other mailinabox things
2005     m sudo -u www-data touch $rclogdir/errors.log
2006
2007     #### begin carddav install
2008     # This is the official roundcube carddav repo.
2009     # Install doc suggests downloading with composer, but that
2010     # didnt work, it said some ldap package for roundcube was missing,
2011     # but I dont want to download some extra ldap thing.
2012     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/INSTALL.md
2013     verf=$rcdir/plugins/carddav/myversion
2014     upgrade=false
2015     install=false
2016     v=4.0.0
2017     if [[ -e $verf ]]; then
2018       if [[ $(cat $verf) != "$v" ]]; then
2019         install=true
2020         upgrade=true
2021       fi
2022     else
2023       install=true
2024     fi
2025     if $install; then
2026       m rm -rf $rcdir/plugins/carddav
2027       tmpd=$(mktemp -d)
2028       m wget -nv -O $tmpd/t.tgz https://github.com/blind-coder/rcmcarddav/releases/download/v$v/carddav-v$v.tgz
2029       cd $rcdir/plugins
2030       tar xzf $tmpd/t.tgz
2031       rm -rf $tmpd
2032       m chown -R www-data:www-data $rcdir/plugins/carddav
2033       m cd $rcdir/plugins/carddav
2034       if $upgrade; then
2035         m sudo -u www-data composer-1.phar update --no-dev
2036       else
2037         m sudo -u www-data composer-1.phar install --no-dev
2038       fi
2039       m chown -R root:root $rcdir/plugins/carddav
2040       echo $v >$verf
2041     fi
2042
2043     # So, strangely, this worked in initial testing, but then
2044     # on first run it wouldn't show the existing contacts until
2045     # I went into the carddav settings and did "force immediate sync",
2046     # which seemed to fix things. Note, some of these settings
2047     # get initalized per/addressbook in the db, then need changing
2048     # there or through the settings menu.
2049
2050     # About categories, see https://www.davx5.com/tested-with/nextcloud
2051     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/GROUPS.md
2052     i $rcdir/plugins/carddav/config.inc.php <<EOF;
2053 <?php
2054 \$prefs['_GLOBAL']['hide_preferences'] = false;
2055 \$prefs['davserver'] = array(
2056 # name in the UI is kind of dumb. This is just something short that seems to fit ok.
2057   'name'         =>  'Main',
2058   'username'     =>  '%u', // login username
2059   'password'     =>  '%p', // login password
2060   'url'          =>  'https://$domain/nextcloud/remote.php/dav/addressbooks/users/%u/contacts',
2061   'active'       =>  true,
2062   'readonly'     =>  false,
2063   'refresh_time' => '00:10:00',
2064   'fixed'        =>  array('username','password'),
2065   'use_categories' => false,
2066   'hide'        =>  false,
2067 );
2068 ?>
2069 EOF
2070     #### end carddav install
2071
2072     cd $rcdir/plugins
2073     if [[ ! -d html5_notifier ]]; then
2074       m git clone https://github.com/stremlau/html5_notifier
2075     fi
2076     cd $rcdir/plugins/html5_notifier
2077     m git pull --rebase
2078
2079     # todo: try out roundcube plugins: thunderbird labels
2080
2081     # Password changing plugin settings
2082     cat $rcdir/plugins/password/config.inc.php.dist - >$rcdir/plugins/password/config.inc.php <<'EOF'
2083 # following are from mailinabox
2084 $config['password_minimum_length'] = 8;
2085 $config['password_db_dsn'] = 'sqlite:////m/rc/users.sqlite';
2086 $config['password_query'] = 'UPDATE users SET password=%D WHERE email=%u';
2087 $config['password_dovecotpw'] = '/usr/bin/doveadm pw';
2088 $config['password_dovecotpw_method'] = 'SHA512-CRYPT';
2089 $config['password_dovecotpw_with_method'] = true;
2090 EOF
2091     # so PHP can use doveadm, for the password changing plugin
2092     m usermod -a -G dovecot www-data
2093     m usermod -a -G mail $u
2094
2095     # so php can update passwords
2096     m chown www-data:dovecot /m/rc/users.sqlite
2097     m chmod 664 /m/rc/users.sqlite
2098
2099     # Run Roundcube database migration script (database is created if it does not exist)
2100     m $rcdir/bin/updatedb.sh --dir $rcdir/SQL --package roundcube
2101     m chown www-data:www-data $rcdb
2102     m chmod 664 $rcdb
2103   done # end loop over domains and rcdirs
2104
2105   ### begin php setup for rc ###
2106   # Enable PHP modules.
2107   m phpenmod -v php mcrypt imap
2108   # dpkg says this is required
2109   m a2enmod proxy_fcgi setenvif
2110   fpm=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* (php[^ ]*-fpm)( .*|$)/\1/p') # eg: php7.4-fpm
2111   phpver=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* php([^ ]*)-fpm( .*|$)/\1/p')
2112   m a2enconf $fpm
2113   # 3 useless guides on php fpm fcgi debian 10 later, i figure out from reading
2114   # /etc/apache2/conf-enabled/php7.3-fpm.conf
2115   m a2dismod php$phpver
2116   # according to /install, we should set date.timezone,
2117   # but that is dumb, the system already has the right zone in
2118   # $rclogdir/errors.log
2119   # todo: consider other settings in
2120   # /a/opt/mailinabox/setup/nextcloud.sh
2121   i /etc/php/$phpver/cli/conf.d/30-local.ini <<'EOF'
2122 apc.enable_cli = 1
2123 EOF
2124
2125   i /etc/php/$phpver/fpm/conf.d/30-local.ini <<'EOF'
2126 date.timezone = "America/New_York"
2127 # for nextcloud
2128 upload_max_filesize = 2000M
2129 post_max_size = 2000M
2130 # install checker, nextcloud/settings/admin/overview
2131 memory_limit = 512M
2132 EOF
2133   m systemctl restart $fpm
2134   # dunno if reload/restart is needed
2135   m systemctl reload apache2
2136   # note bk backups are defined in crontab outside this file
2137   ### end php setup for rc ###
2138
2139 fi # end roundcube setup
2140
2141 # * nextcloud setup
2142
2143 if [[ $HOSTNAME == bk ]]; then
2144   # from install checker, nextcloud/settings/admin/overview and
2145   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2146   # curl from the web installer requirement, but i switched to cli
2147   # it recommends php-file info, but that is part of php7.3-common, already got installed
2148   # with roundcube.
2149   m pi php-curl php-bz2 php-gmp php-bcmath php-imagick php-apcu
2150
2151   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2152   cat >/etc/php/$phpver/fpm/pool.d/localwww.conf <<'EOF'
2153 [www]
2154 clear_env = no
2155 EOF
2156
2157   for ((i=0; i < ${#bkdomains[@]}; i++)); do
2158     domain=${bkdomains[i]}
2159     ncdir=${ncdirs[i]}
2160     ncbase=${ncdir##*/}
2161     m cd /var/www
2162     if [[ ! -e $ncdir/index.php ]]; then
2163       # if we wanted to only install a specific version, use something like
2164       # file=latest-22.zip
2165       file=latest.zip
2166       m wget -nv -N https://download.nextcloud.com/server/releases/$file
2167       m rm -rf nextcloud
2168       m unzip -q $file
2169       m rm -f $file
2170       m chown -R www-data.www-data nextcloud
2171       m mv nextcloud $ncdir
2172       m cd $ncdir
2173       m sudo -u www-data php occ  maintenance:install --database sqlite --admin-user iank --admin-pass $nextcloud_admin_pass
2174     fi
2175     # note, strange this happend where updater did not increment the version var,
2176     # mine was stuck on 20. I manually updated it.
2177     m cd $ncdir/config
2178     if [[ ! -e config.php-orig ]]; then
2179       m cp -a config.php config.php-orig
2180     fi
2181     cat config.php-orig - >tmp.php <<EOF
2182 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/email_configuration.html
2183 \$CONFIG["mail_smtpmode"] = "sendmail";
2184 \$CONFIG["mail_smtphost"] = "127.0.0.1";
2185 \$CONFIG["mail_smtpport"] = 25;
2186 \$CONFIG["mail_smtptimeout"] = 10;
2187 \$CONFIG["mail_smtpsecure"] = "";
2188 \$CONFIG["mail_smtpauth"] = false;
2189 \$CONFIG["mail_smtpauthtype"] = "LOGIN";
2190 \$CONFIG["mail_smtpname"] = "";
2191 \$CONFIG["mail_smtppassword"] = "";
2192 \$CONFIG["mail_domain"] = "$domain";
2193
2194 # https://github.com/nextcloud/user_external#readme
2195 # plus mailinabox example
2196 #\$CONFIG['user_backends'] = array(array('class' => 'OC_User_IMAP','arguments' => array('127.0.0.1', 143, null),),);
2197
2198
2199 # based on installer check
2200 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/caching_configuration.html
2201 \$CONFIG['memcache.local'] = '\OC\Memcache\APCu';
2202
2203 \$CONFIG['overwrite.cli.url'] = 'https://$domain/nextcloud';
2204 \$CONFIG['htaccess.RewriteBase'] = '/nextcloud';
2205 \$CONFIG['trusted_domains'] = array (
2206         0 => '$domain',
2207     );
2208 #\$CONFIG[''] = '';
2209 fwrite(STDOUT, "<?php\n\\\$CONFIG = ");
2210 var_export(\$CONFIG);
2211 fwrite(STDOUT, ";\n");
2212 EOF
2213     m php tmp.php >config.php
2214     m rm tmp.php
2215     m sudo -u www-data php $ncdir/occ maintenance:update:htaccess
2216     list=$(sudo -u www-data php $ncdir/occ --output=json_pretty app:list)
2217     # user_external not compaible with nc 23
2218     for app in contacts calendar; do
2219       if [[ $(printf "%s\n" "$list"| jq ".enabled.$app") == null ]]; then
2220         m sudo -u www-data php $ncdir/occ app:install $app
2221       fi
2222     done
2223     i /etc/systemd/system/$ncbase.service <<EOF
2224 [Unit]
2225 Description=ncup $ncbase
2226 After=multi-user.target
2227
2228 [Service]
2229 Type=oneshot
2230 ExecStart=/usr/local/bin/ncup $ncbase
2231 User=www-data
2232 IOSchedulingClass=idle
2233 CPUSchedulingPolicy=idle
2234 EOF
2235     i /etc/systemd/system/$ncbase.timer <<EOF
2236 [Unit]
2237 Description=ncup $ncbase timer
2238
2239 [Timer]
2240 OnCalendar=Daily
2241
2242 [Install]
2243 WantedBy=timers.target
2244 EOF
2245     systemctl enable --now $ncbase.timer
2246     i /usr/local/bin/ncup <<'EOFOUTER'
2247 #!/bin/bash
2248 if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
2249 shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
2250 set -eE -o pipefail
2251 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR
2252
2253 ncbase=$1
2254 if ! php /var/www/$ncbase/updater/updater.phar -n; then
2255   echo failed nextcloud update for $ncbase >&2
2256   /sbin/exim -t <<EOF
2257 To: alerts@iankelling.org
2258 From: root@$(hostname -f)
2259 Subject: failed nextcloud update for $ncbase
2260
2261 For logs, run: jr -u $ncbase
2262 EOF
2263 fi
2264 EOFOUTER
2265
2266     mkdir -p /var/www/cron-errors
2267     chown www-data.www-data /var/www/cron-errors
2268     i /etc/cron.d/$ncbase <<EOF
2269 PATH=/sbin:/usr/sbin:/usr/bin:/bin:/usr/local/bin
2270 SHELL=/bin/bash
2271 # https://docs.nextcloud.com/server/20/admin_manual/configuration_server/background_jobs_configuration.html
2272 */5  *  *  *  * www-data php -f $ncdir/cron.php --define apc.enable_cli=1 |& log-once nccron
2273 EOF
2274
2275   done
2276 fi
2277
2278
2279 # * exim host conditional config
2280
2281 # ** exim certs
2282
2283 all_dirs=(/p/c/filesystem)
2284 for x in /p/c/machine_specific/*.hosts /a/bin/ds/machine_specific/*.hosts; do
2285   if grep -qxF $HOSTNAME $x; then all_dirs+=( ${x%.hosts} ); fi
2286 done
2287 files=()
2288 for d in ${all_dirs[@]}; do
2289   f=$d/etc/exim4/passwd
2290   if [[ -e $f  ]]; then
2291     files+=($f)
2292   fi
2293   tmp=($d/etc/exim4/*.pem)
2294   if (( ${#tmp[@]} )); then
2295     files+=(${tmp[@]})
2296   fi
2297 done
2298
2299 if (( ${#files[@]} )); then
2300   sudo rsync -ahhi --chown=root:Debian-exim --chmod=0640 ${files[@]} /etc/exim4/
2301 fi
2302
2303
2304 # ** exim: auth
2305
2306 case $HOSTNAME in
2307   bk|je)
2308     # avoid accepting mail for invalid users
2309     # https://wiki.dovecot.org/LMTP/Exim
2310     cat >>/etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2311 deny
2312   message = invalid recipient
2313   domains = +local_domains
2314   !verify = recipient/callout=no_cache
2315 EOF
2316     i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2317 dovecot_plain:
2318   driver = dovecot
2319   public_name = PLAIN
2320   server_socket = /var/run/dovecot/auth-client
2321   server_set_id = $auth1
2322 EOF
2323     ;;
2324 esac
2325 if $bhost_t; then
2326   i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2327 # from 30_exim4-config_examples
2328 plain_server:
2329 driver = plaintext
2330 public_name = PLAIN
2331 server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
2332 server_set_id = $auth2
2333 server_prompts = :
2334 .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
2335 server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
2336 .endif
2337 EOF
2338 fi
2339
2340 # ** exim: main daemon use non-default config file
2341 case $HOSTNAME in
2342   bk|$MAIL_HOST)
2343     # to see the default comments in /etc/default/exim4:
2344     # s update-exim4defaults --force --init
2345     # which will overwrite any existing file
2346     i /etc/default/exim4 <<'EOF'
2347 QUEUERUNNER='combined'
2348 QUEUEINTERVAL='30m'
2349 COMMONOPTIONS='-C /etc/exim4/my.conf'
2350 UPEX4OPTS='-o /etc/exim4/my.conf'
2351 #E4BCD_PANICLOG_NOISE='exim user lost privilege for using -C option'
2352 EOF
2353     chown Debian-exim:Debian-exim /usr/sbin/exim4
2354     # needs guid set in order to become Debian-exim
2355     chmod g+s,u+s /usr/sbin/exim4
2356     i /etc/exim4/trusted_configs <<'EOF'
2357 /etc/exim4/my.conf
2358 EOF
2359     ;;
2360   *)
2361     # default file
2362     i /etc/default/exim4 <<'EOF'
2363 QUEUERUNNER='combined'
2364 QUEUEINTERVAL='30m'
2365 EOF
2366     ;;
2367 esac
2368
2369 # ** exim non-root
2370
2371 case $HOSTNAME in
2372   bk|je|li)
2373     # no reason to expect it to ever be there.
2374     rm -fv /etc/systemd/system/exim4.service.d/nonroot.conf
2375     ;;
2376   *)
2377     i /etc/systemd/system/exim4.service.d/nonroot.conf <<'EOF'
2378 [Service]
2379 # see 56.2 Root privilege in exim spec
2380 AmbientCapabilities=CAP_NET_BIND_SERVICE
2381 # https://www.redhat.com/sysadmin/mastering-systemd
2382 # things that seem good and reasonabl.e
2383 PrivateTmp=yes
2384 ProtectHome=yes
2385 # note, in t10 systemd, if one of these is an sshfs mountpoint,
2386 # this whole setting doesnt work. tried it with a newer systemd 250 though
2387 # an nspawn, and it worked there.
2388 InaccessiblePaths=d m media mnt nocow o p q
2389 NoNewPrivileges=yes
2390 ProtectSystem=yes
2391
2392 # when we get newer systemd
2393 #ProtectDevices=yes
2394 EOF
2395     i /etc/exim4/conf.d/main/000_local-noroot <<'EOF'
2396 # see 56.2 Root privilege in exim spec
2397 deliver_drop_privilege = true
2398 EOF
2399     files=(
2400       300_exim4-config_real_local
2401       600_exim4-config_userforward
2402       700_exim4-config_procmail
2403       800_exim4-config_maildrop
2404       mmm_mail4root
2405     )
2406     for f in ${files[@]}; do
2407       echo "# iank: removed due to running nonroot"|i /etc/exim4/conf.d/router/$f
2408     done
2409     ;;
2410 esac
2411
2412 case $HOSTNAME in
2413
2414   # ** $MAIL_HOST|bk|je)
2415   $MAIL_HOST|bk|je)
2416
2417     echo|i /etc/exim4/conf.d/router/870_backup_local
2418
2419     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2420 # note: some things we don't set that are here by default because they are unused.
2421 dc_local_interfaces=''
2422 dc_eximconfig_configtype='internet'
2423 dc_localdelivery='dovecot_lmtp'
2424 EOF
2425     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2426 # recommended if dns is expected to work
2427 CHECK_RCPT_VERIFY_SENDER = true
2428 # default config comment says: If you enable this, you might reject legitimate mail,
2429 # but eggs has had this a long time, so that seems unlikely.
2430 CHECK_RCPT_SPF = true
2431 CHECK_RCPT_REVERSE_DNS = true
2432 CHECK_MAIL_HELO_ISSUED = true
2433
2434 # enable 587 in addition to the default 25, so that
2435 # i can send mail where port 25 is firewalled by isp
2436 daemon_smtp_ports = 25 : 587
2437 # default of 25, can get stuck when catching up on mail
2438 smtp_accept_max = 400
2439 smtp_accept_reserve = 100
2440 smtp_reserve_hosts = +iank_trusted
2441
2442 # options exim has to avoid having to alter the default config files
2443 CHECK_RCPT_LOCAL_ACL_FILE = /etc/exim4/conf.d/rcpt_local_acl
2444 CHECK_DATA_LOCAL_ACL_FILE = /etc/exim4/conf.d/data_local_acl
2445 LOCAL_DENY_EXCEPTIONS_LOCAL_ACL_FILE = /etc/exim4/conf.d/local_deny_exceptions_acl
2446 # testing dmarc
2447 #dmarc_tld_file = /etc/public_suffix_list.dat
2448 EOF
2449     ;;&
2450
2451   # ** $MAIL_HOST|bk)
2452   $MAIL_HOST|bk)
2453
2454     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2455 # je.b8.nz will run out of memory with freshclam
2456 av_scanner = clamd:/var/run/clamav/clamd.ctl
2457 EOF
2458
2459     cat >> /etc/exim4/conf.d/data_local_acl <<'EOF'
2460 deny
2461   malware = */defer_ok
2462   !condition = ${if match {$malware_name}{\N^Heuristic\N}}
2463   message = This message was detected as possible malware ($malware_name).
2464 EOF
2465
2466     cat >/etc/exim4/conf.d/main/000_local-nn <<EOF
2467 # MAIN_HARDCODE_PRIMARY_HOSTNAME might mess up the
2468 # smarthost config type, not sure.
2469 # failing message on mail-tester.com:
2470 # We check if there is a server (A Record) behind your hostname kd.
2471 # You may want to publish a DNS record (A type) for the hostname kd or use a different hostname in your mail software
2472 # https://serverfault.com/questions/46545/how-do-i-change-exim4s-primary-hostname-on-a-debian-box
2473 # and this one seemed appropriate from grepping config.
2474 # I originally set this to li.iankelling.org, but then ended up with errors when li tried to send
2475 # mail to kd, so this should basically be a name that no host has as their
2476 # canonical hostname since the actual host sits behind a nat and changes.
2477 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail.iankelling.org
2478 # I used this to avoid sender verification, didnt work but it still
2479 # makes sense based on the spec.
2480 hosts_treat_as_local = defaultnn.b8.nz
2481
2482 # Outside nn, we get the default cert location from a debian macro,
2483 # and the cert file is put in place by a certbot hook.
2484 MAIN_TLS_CERTIFICATE = /etc/exim4/fullchain.pem
2485 MAIN_TLS_PRIVATEKEY = /etc/exim4/privkey.pem
2486 EOF
2487
2488     i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost <<'EOF'
2489 gnusmarthost:
2490   debug_print = "R: smarthost for $local_part@$domain"
2491   driver = manualroute
2492   domains = ! +local_domains
2493 # send most mail through eggs, helps fsfs sender reputation.
2494 # uncomment and optionally move to 188 file to send through my own servers again
2495   senders = *@gnu.org
2496   transport = smarthost_dkim
2497   route_list = * fencepost.gnu.org::587 byname
2498   host_find_failed = ignore
2499   same_domain_copy_routing = yes
2500   no_more
2501 EOF
2502
2503     /a/exe/cedit defaultnn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2504 10.173.8.1 defaultnn.b8.nz
2505 EOF
2506     ;;&
2507   # ** $MAIL_HOST)
2508   $MAIL_HOST)
2509
2510     i /etc/exim4/conf.d/router/195_dnslookup_vpn <<'EOF'
2511 # copied from /etc/exim4/conf.d/router/200_exim4-config_primary, but
2512 # use vpn transport. lower priority so it overrides the default route.
2513 # Use this in case our vpn fails, we dont send anything without it.
2514 .ifdef DCconfig_internet
2515 dnslookup_vpn:
2516   debug_print = "R: dnslookup for $local_part@$domain"
2517   driver = dnslookup
2518   domains = ! +local_domains
2519   transport = remote_smtp_vpn
2520   same_domain_copy_routing = yes
2521   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
2522   no_more
2523 .endif
2524 EOF
2525
2526
2527     # note on backups: I used to do an automatic sshfs and restricted
2528     # permissions to a specific directory on the remote server, /bu/mnt,
2529     # which required using a dedicated user, but realized smtp will be
2530     # more reliable and less fuss. If I ever need that again, see the
2531     # history of this file, and bum in brc2.
2532
2533     i /etc/exim4/conf.d/router/890_backup_copy <<EOF
2534 ### router/900_exim4-config_local_user
2535 #################################
2536
2537 # todo, it would be nice to save sent email too,
2538 # but its not so important, they still exist in my head
2539
2540 backup_redir:
2541 driver = redirect
2542 domains = +local_domains
2543 # b is just an arbirary short string
2544 data = b@eximbackup.b8.nz
2545 # note, to test this, i could temporarily allow testignore.
2546 # alerts avoids potential mail loop. root is already
2547 # redirected earlier, so that is just being overly cautious.
2548 local_parts = ! root : ! testignore : ! alerts
2549 unseen = true
2550
2551 backup_copy:
2552 driver = manualroute
2553 domains = eximbackup.b8.nz
2554 transport = backup_remote
2555 ignore_target_hosts = ${HOSTNAME}wg.b8.nz
2556 # note changes here also require change in passwd.client
2557 route_list = * eximbackup.b8.nz
2558 same_domain_copy_routing = yes
2559 errors_to = alerts@iankelling.org
2560 no_more
2561 EOF
2562
2563
2564     i /etc/exim4/conf.d/transport/30_backup_remote <<'EOF'
2565 backup_remote:
2566   driver = smtp
2567   multi_domain
2568 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
2569   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
2570 .endif
2571   hosts_require_auth = *
2572   hosts_try_auth = *
2573   envelope_to_add
2574   # manual return path because we want it to be the envelope sender
2575   # we got not the one we are using in this smtp transport
2576   headers_add = "Return-path: $sender_address"
2577 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2578   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2579 .endif
2580 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2581   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2582 .endif
2583 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2584   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2585 .endif
2586 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
2587   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
2588 .endif
2589 .ifdef REMOTE_SMTP_HEADERS_REWRITE
2590   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
2591 .endif
2592 .ifdef REMOTE_SMTP_HELO_DATA
2593   helo_data=REMOTE_SMTP_HELO_DATA
2594 .endif
2595 .ifdef TLS_DH_MIN_BITS
2596 tls_dh_min_bits = TLS_DH_MIN_BITS
2597 .endif
2598 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2599 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2600 .endif
2601 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2602 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2603 .endif
2604 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2605   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2606 .endif
2607 EOF
2608
2609
2610     # this avoids some error. i cant remember what. todo:
2611     # test it out and document why/if its needed.
2612     #     i /etc/exim4/host_local_deny_exceptions <<'EOF'
2613     # mail.fsf.org
2614     # *.posteo.de
2615     # EOF
2616
2617     # cron email from smarthost hosts will automatically be to
2618     # USER@FQDN. I redirect that to alerts@, on the smarthosts, but in
2619     # case that doesn't work, we still want to accept that mail, but not
2620     # from any host except the smarthosts. local_hostnames and this rule
2621     # is for that purpose.
2622     i /etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2623 deny
2624   !authenticated = *
2625   domains = +local_hostnames
2626   message = no relay
2627 EOF
2628     echo|i /etc/exim4/conf.d/router/880_universal_forward
2629
2630     # for iank@fsf.org, i have mail.fsf.org forward it to fsf@iankelling.org.
2631     # and also have mail.iankelling.org whitelisted as a relay domain.
2632     # I could avoid that if I changed this to submit to 587 with a
2633     # password like a standard mua.
2634     i /etc/exim4/conf.d/router/188_exim4-config_smarthost <<'EOF'
2635 # ian: copied from /etc/exim4/conf.d/router/200_exim4-config_primary, and added senders = and
2636 # replaced DCsmarthost with hostname
2637 fsfsmarthost:
2638   debug_print = "R: smarthost for $local_part@$domain"
2639   driver = manualroute
2640   domains = ! +local_domains
2641   senders = *@fsf.org
2642   transport = remote_smtp_smarthost
2643   route_list = * mail.fsf.org::587 byname
2644   host_find_failed = ignore
2645   same_domain_copy_routing = yes
2646   no_more
2647
2648 posteosmarthost:
2649   debug_print = "R: smarthost for $local_part@$domain"
2650   driver = manualroute
2651   domains = ! +local_domains
2652   senders = *@posteo.net
2653   transport = remote_smtp_smarthost
2654   route_list = * posteo.de::587 byname
2655   host_find_failed = ignore
2656   same_domain_copy_routing = yes
2657   no_more
2658
2659 EOF
2660
2661     # Greping /etc/exim4, unqualified mails this would end up as
2662     # a return path, so it should go somewhere we will see.
2663     # The debconf output about mailname is as follows:
2664     # The 'mail name' is the domain name used to 'qualify' mail addresses without a domain
2665     # name.
2666     # This name will also be used by other programs. It should be the single, fully
2667     # qualified domain name (FQDN).
2668     # Thus, if a mail address on the local host is foo@example.org, the correct value for
2669     # this option would be example.org.
2670     # This name won\'t appear on From: lines of outgoing messages if rewriting is enabled.
2671     echo iankelling.org > /etc/mailname
2672
2673
2674     # mail.iankelling.org so local imap clients can connect with tls and
2675     # when they happen to not be local.
2676     # todo: this should be 10.8.0.4
2677
2678     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2679 # note: i put nn.b8.nz into bind for good measure
2680 10.173.8.2 nn.b8.nz mx.iankelling.org
2681 EOF
2682
2683     # note: systemd-resolved will consult /etc/hosts, dnsmasq wont. this assumes
2684     # weve configured this file in dnsmasq if we are using it.
2685     /a/exe/cedit mail /etc/dnsmasq-servers.conf <<'EOF' || [[ $? == 1 ]]
2686 server=/mx.iankelling.org/127.0.1.1
2687 EOF
2688     # I used to use debconf-set-selections + dpkg-reconfigure,
2689     # which then updates this file
2690     # but the process is slower than updating it directly and then I want to set other things in
2691     # update-exim4.conf.conf, so there's no point.
2692     # The file is documented in man update-exim4.conf,
2693     # except the man page is not perfect, read the bash script to be sure about things.
2694
2695     # The debconf questions output is additional documentation that is not
2696     # easily accessible, but super long, along with the initial default comment in this
2697     # file, so I've saved that into ./mail-notes.conf.
2698     #
2699     # # TODO: remove mx.iankelling.org once systems get updated mail-setup from jan 2022
2700     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2701 # man page: is used to build the local_domains list, together with "localhost"
2702 # this is duplicated in a later router.
2703 dc_other_hostnames='iankelling.org;zroe.org;r2e.iankelling.org;mx.iankelling.org;!je.b8.nz;!bk.b8.nz;*.b8.nz;b8.nz'
2704 EOF
2705
2706
2707     # dmarc. not used currently
2708     f=/etc/cron.daily/refresh-dmarc-tld-file
2709     cat >$f <<'EOF'
2710 #!/bin/bash
2711 cd /etc
2712 wget -q -N https://publicsuffix.org/list/public_suffix_list.dat
2713 EOF
2714     m chmod 755 $f
2715
2716     ;;
2717   # ** bk
2718   ## we use this host to monitor MAIL_HOST and host a mail server for someone
2719   bk)
2720
2721     echo|i /etc/exim4/conf.d/rcpt_local_acl
2722     echo|i /etc/exim4/conf.d/router/880_universal_forward
2723
2724     echo amnimal.ninja > /etc/mailname
2725
2726     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2727 10.173.8.2 nn.b8.nz
2728 EOF
2729
2730     sed -r -f - /etc/init.d/exim4  <<'EOF' | i /etc/init.d/exim4in
2731 s,/etc/default/exim4,/etc/default/exim4in,g
2732 s,/run/exim4/exim.pid,/run/exim4/eximin.pid,g
2733 s,(^[ #]*Provides:).*,\1 exim4in,
2734 s,(^[ #]*NAME=).*,\1"exim4in",
2735 EOF
2736     chmod +x /etc/init.d/exim4in
2737     i /etc/systemd/system/exim4in.service.d/alwaysrestart.conf <<'EOF'
2738 [Unit]
2739 # needed to continually restart
2740 StartLimitIntervalSec=0
2741
2742 [Service]
2743 Restart=always
2744 # time to sleep before restarting a service
2745 RestartSec=20
2746 EOF
2747
2748     i /etc/default/exim4in <<'EOF'
2749 # defaults but no queue runner and alternate config dir
2750 QUEUERUNNER='no'
2751 COMMONOPTIONS='-oP /run/exim4/eximin.pid'
2752 UPEX4OPTS='-d /etc/myexim4'
2753 EOF
2754
2755     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2756 # man page: is used to build the local_domains list, together with "localhost"
2757 dc_other_hostnames='amnimal.ninja;expertpathologyreview.com'
2758 EOF
2759
2760     ;;
2761   # ** je
2762   je)
2763     echo je.b8.nz > /etc/mailname
2764     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2765 dc_other_hostnames='je.b8.nz'
2766 EOF
2767     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2768     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2769     echo|i /etc/exim4/conf.d/rcpt_local_acl
2770     echo|i /etc/exim4/conf.d/router/880_universal_forward
2771     ;;
2772   # ** not MAIL_HOST|bk|je
2773   *)
2774     # this one should be removed for all non mail hosts, but
2775     # bk and je never become mail_host
2776     echo|i /etc/exim4/conf.d/router/195_dnslookup_vpn
2777
2778     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2779     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2780     echo|i /etc/exim4/conf.d/rcpt_local_acl
2781     echo|i /etc/exim4/conf.d/router/890_backup_copy
2782     echo|i /etc/exim4/conf.d/main/000_local-nn
2783
2784
2785     if $bhost_t; then
2786       cat >>/etc/exim4/conf.d/main/000_local <<EOF
2787 MAIN_TLS_CERTIFICATE = /etc/exim4/certs/$wghost/fullchain.pem
2788 MAIN_TLS_PRIVATEKEY = /etc/exim4/certs/$wghost/privkey.pem
2789 # so we can maintiain the originals of the backups.
2790 # we wouldnt want this if we were dealing with any other
2791 # local deliveries, but we sent all others to the smarthost
2792 # which then strips the headers.
2793 envelope_to_remove = false
2794 return_path_remove = false
2795 EOF
2796     fi
2797
2798     # catches things like cronjob email
2799     i /etc/exim4/conf.d/router/880_universal_forward <<'EOF'
2800 universal_forward:
2801   driver = redirect
2802   domains = +local_domains
2803   data = alerts@iankelling.org
2804 EOF
2805
2806
2807     for unit in ${nn_progs[@]}; do
2808       f=/etc/systemd/system/$unit.service.d/nn.conf
2809       rm -fv $f
2810     done
2811
2812     # dont i dont care if defaultnn section gets left, it wont
2813     # get used.
2814     echo | /a/exe/cedit nn /etc/hosts || [[ $? == 1 ]]
2815     echo | /a/exe/cedit mail /etc/dnsmasq-servers.conf || [[ $? == 1 ]]
2816
2817
2818     if $bhost_t; then
2819       install -d /bu
2820       install -d -g $u -o $u -m 771 /bu/md
2821       i /etc/exim4/conf.d/transport/30_backup_maildir <<EOF
2822 # modified debian maildir transport
2823 backup_maildir:
2824   driver = appendfile
2825   directory = /bu/md
2826   delivery_date_add
2827   # note, no return path or envelope added
2828   maildir_format
2829   directory_mode = 0700
2830   mode = 0644
2831   mode_fail_narrower = false
2832   user = $u
2833 EOF
2834
2835       i /etc/exim4/conf.d/router/870_backup_local <<'EOF'
2836 ### router/900_exim4-config_local_user
2837 #################################
2838
2839 backup_local:
2840   debug_print = "R: local_user for $local_part@$domain"
2841   driver = accept
2842   domains = eximbackup.b8.nz
2843   transport = backup_maildir
2844 EOF
2845
2846       # Bind to wghole to receive mailbackup.
2847       wgholeip=$(sed -rn 's/^ *Address *= *([^/]+).*/\1/p' /etc/wireguard/wghole.conf)
2848       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2849 dc_other_hostnames='eximbackup.b8.nz'
2850 dc_local_interfaces='127.0.0.1;::1;$wgholeip'
2851 EOF
2852
2853       # wghole & thus exim will fail to start without internet connectivity.
2854       i /etc/systemd/system/exim4.service.d/backup.conf <<'EOF'
2855 [Unit]
2856 StartLimitIntervalSec=0
2857
2858 [Service]
2859 Restart=always
2860 RestartSec=20
2861 EOF
2862
2863     else
2864       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2865 # Note: If theres like a temporary problem where mail gets sent to
2866 # one of these hosts, if exim isnt listening, it will be a temporary error
2867 # instead of a permanent 5xx.
2868 dc_local_interfaces='127.0.0.1;::1'
2869 EOF
2870       rm -fv /etc/systemd/system/exim4.service.d/backup.conf
2871     fi
2872     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2873 dc_eximconfig_configtype='smarthost'
2874 dc_smarthost='$smarthost'
2875 EOF
2876
2877     hostname -f |i /etc/mailname
2878     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2879 # The manpage incorrectly states this will do header rewriting, but
2880 # that only happens if we have dc_hide_mailname is set.
2881 dc_readhost='iankelling.org'
2882 # Only used in case of bounces.
2883 dc_localdelivery='maildir_home'
2884 EOF
2885     ;;
2886 esac
2887
2888
2889
2890
2891 # ** $MAILHOST|bk, things that belong at the end
2892 case $HOSTNAME in
2893   $MAIL_HOST|bk)
2894     # config for the non-nn exim
2895     m rsync -ra --delete /etc/exim4/ /etc/myexim4
2896     # If we ever wanted to have a separate spool,
2897     # we could do it like this.
2898     #     cat >>/etc/exim4/conf.d/main/000_local-nn <<'EOF'
2899     # spool_directory = /var/spool/myexim4
2900     # EOF
2901     cat >>/etc/myexim4/update-exim4.conf.conf <<'EOF'
2902 dc_eximconfig_configtype='smarthost'
2903 dc_smarthost='nn.b8.nz'
2904 EOF
2905     ;;&
2906   bk)
2907
2908     # config for the non-nn exim
2909     cat >/etc/myexim4/conf.d/main/000_local-nn <<'EOF'
2910 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail2.iankelling.org
2911 EOF
2912     ;;
2913   $MAIL_HOST)
2914     # for bk, we have a exim4in.service that will do this for us.
2915     m update-exim4.conf -d /etc/myexim4
2916     ;;
2917 esac
2918
2919 # * spool dir setup
2920
2921 # ** bind mount setup
2922 # put spool dir in directory that spans multiple distros.
2923 # based on http://www.postfix.org/qmgr.8.html and my notes in gnus
2924 #
2925 dir=/nocow/exim4
2926 sdir=/var/spool/exim4
2927 # we only do this if our system has $dir
2928
2929 # this used to do a symlink, but, in the boot logs, /nocow would get mounted succesfully,
2930 # about 2 seconds later, exim starts, and immediately puts into paniclog:
2931 # honVi-0000u3-82 Failed to create directory "/var/spool/exim4/input": No such file or directory
2932 # so, im trying a bind mount to get rid of that.
2933 if [[ -e /nocow ]]; then
2934   if ! grep -Fx "/nocow/exim4  /var/spool/exim4  none  bind  0 0" /etc/fstab; then
2935     echo "/nocow/exim4  /var/spool/exim4  none  bind  0 0" >>/etc/fstab
2936   fi
2937   i /etc/systemd/system/exim4.service.d/override.conf <<'EOF'
2938 [Unit]
2939 # without local-fs on exim, we get these kind of errors in paniclog on shutdown:
2940 # Failed to create spool file /var/spool/exim4//input//1jCLxz-0008V4-V9-D: Permission denied
2941 After=local-fs.target
2942 EOF
2943   if ! mountpoint -q $sdir; then
2944     stopifactive exim4 exim4in
2945     if [[ -L $sdir ]]; then
2946       m rm $sdir
2947     fi
2948     if [[ ! -e $dir && -d $sdir ]]; then
2949       m mv $sdir $dir
2950     fi
2951     if [[ ! -d $sdir ]]; then
2952       m mkdir $sdir
2953       m chmod 000 $sdir # only want it to be used when its mounted
2954     fi
2955     m mount $sdir
2956   fi
2957 fi
2958
2959
2960
2961 # ** exim/spool uid setup
2962 # i have the spool directory be common to distro multi-boot, so
2963 # we need the uid to be the same. 608 cuz it's kind of in the middle
2964 # of the free system uids.
2965 IFS=:; read -r _ _ uid _ < <(getent passwd Debian-exim ||:) ||:; unset IFS
2966 IFS=:; read -r _ _ gid _ < <(getent group Debian-exim ||:) ||:; unset IFS
2967 if [[ ! $uid ]]; then
2968   # from /var/lib/dpkg/info/exim4-base.postinst, plus uid and gid options
2969   m adduser --uid 608 --system --group --quiet --home /var/spool/exim4 \
2970     --no-create-home --disabled-login --force-badname Debian-exim
2971 elif [[ $uid != 608 ]]; then
2972   stopifactive exim4 exim4in
2973   m usermod -u 608 Debian-exim
2974   m groupmod -g 608 Debian-exim
2975   m usermod -g 608 Debian-exim
2976   m find / /nocow -path ./var/tmp -prune -o -xdev -uid $uid -execdir chown -h 608 {} +
2977   m find / /nocow -path ./var/tmp -prune -o -xdev -gid $gid -execdir chgrp -h 608 {} +
2978 fi
2979
2980 # * start / stop services
2981
2982 reifactive dnsmasq nscd
2983
2984 if $reload; then
2985   m systemctl daemon-reload
2986 fi
2987
2988 m systemctl --now enable epanicclean.timer
2989
2990 case $HOSTNAME in
2991   je)
2992     /a/exe/web-conf apache2 je.b8.nz
2993     ;;
2994   bk)
2995     /a/exe/web-conf apache2 mail2.iankelling.org
2996     ;;
2997 esac
2998
2999 m /a/bin/ds/mail-cert-cron -1
3000 sre mailcert.timer
3001
3002 case $HOSTNAME in
3003   bk)
3004     # todo, this should be done in distro-begin
3005     soff systemd-resolved
3006     ln -sf 127.0.0.1-resolv/stub-resolv.conf /etc/resolv.conf
3007     ;;&
3008   $MAIL_HOST|bk)
3009     m systemctl --now enable mailnn mailnnroute
3010     ;;&
3011   $MAIL_HOST)
3012     # we use dns to start wg
3013     if $reload; then
3014       sre unbound
3015     else
3016       m systemctl --now enable unbound
3017     fi
3018     ;;&
3019   $MAIL_HOST|bk)
3020     # If these have changes, id rather manually restart it, id rather
3021     # not restart and cause temporary errors
3022     if $reload; then
3023       sre $vpnser
3024     else
3025       m systemctl --now enable $vpnser
3026     fi
3027     if ! systemctl is-active clamav-daemon >/dev/null; then
3028       m systemctl --now enable clamav-daemon
3029       out=$(rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/filesystem/etc/systemd/system/epanicclean.{timer,service} /etc/systemd/system)
3030       if [[ $out ]]; then
3031         reload=true
3032       fi
3033
3034       # note, this will cause paniclog entries because it takes like 45
3035       # seconds for clamav to start, i use ./epanic-clean to remove
3036       # them.
3037     fi
3038     ;;&
3039   $MAIL_HOST|bk|je)
3040     # start spamassassin/dovecot before exim.
3041     sre dovecot spamassassin
3042     # need to wait a bit before restarting exim, else I
3043     # get a paniclog entry like: spam acl condition: all spamd servers failed
3044     sleep 3
3045     m systemctl --now enable mailclean.timer
3046     ;;&
3047   $MAIL_HOST)
3048     # < 2.1 (eg: in t9), uses a different data format which required manual
3049     # migration. dont start if we are running an old version.
3050     if dpkg --compare-versions $(dpkg -s radicale | awk '$1 == "Version:" { print $2 }') ge 2.1; then
3051       m systemctl --now enable radicale
3052     fi
3053     ;;&
3054 esac
3055
3056 # last use of $reload happens in previous block
3057 rm -f /var/local/mail-setup-reload
3058
3059
3060 case $HOSTNAME in
3061   $MAIL_HOST|bk|je) : ;;
3062   *)
3063     soff radicale mailclean.timer dovecot spamassassin $vpnser mailnn clamav-daemon
3064     ;;
3065 esac
3066
3067 sre exim4
3068
3069 case $HOSTNAME in
3070   $MAIL_HOST)
3071     m systemctl --now enable mailbindwatchdog
3072     ;;
3073   *)
3074     soff mailbindwatchdog
3075     ;;
3076 esac
3077
3078
3079 case $HOSTNAME in
3080   bk) sre exim4in ;;
3081 esac
3082
3083 # * mail monitoring / testing
3084
3085 # note, to test clamav, send an email with body that only contains
3086 # https://en.wikipedia.org/wiki/EICAR_test_file
3087 # which set malware_name to Eicar-Signature
3088 case $HOSTNAME in
3089   $MAIL_HOST|bk|je)
3090     # note: cronjob "ian" also does some important monitoring
3091     # todo: this will sometimes cause an alert because mailtest-check will run
3092     # before we have setup network namespace and spamassassin
3093     cat >/etc/cron.d/mailtest <<EOF
3094 SHELL=/bin/bash
3095 PATH=/usr/bin:/bin:/usr/local/bin
3096 MAILTO=alerts@iankelling.org
3097 */5 * * * *   $u send-test-forward |& log-once send-test-forward
3098 */10 * * * *   root chmod -R g+rw /m/md/bounces |& log-once -1 bounces-chmod
3099 # im seeing some intermittent failures on the slow check, do it all the time
3100 # for now. It looks like a dns failure.
3101 #5-59/5 * * * *   root mailtest-check |& log-once -1 mailtest-check
3102 #0 * * * *   root mailtest-check slow |& log-once -1 mailtest-slow
3103 */5 * * * *   root timeout 290 mailtest-check slow |& log-once -12 mailtest-check
3104 # if a bounce happened yesterday, dont let it slip through the cracks
3105 8   1 * * *   root awk '$5 == "**"' /var/log/exim4/mainlog.1
3106 EOF
3107     m sudo rsync -ahhi --chown=root:root --chmod=0755 \
3108       /b/ds/mailtest-check /b/ds/check-remote-mailqs /usr/local/bin/
3109     ;;&
3110   $MAIL_HOST)
3111     test_froms=(ian@iankelling.org z@zroe.org iank@gnu.org)
3112     test_to="testignore@expertpathologyreview.com, testignore@je.b8.nz, testignore@amnimal.ninja, jtuttle@gnu.org"
3113
3114     cat >>/etc/cron.d/mailtest <<EOF
3115 2   * * * *   root check-remote-mailqs |& log-once check-remote-mailqs
3116 EOF
3117     ;;&
3118   bk)
3119     test_froms=(testignore@expertpathologyreview.com testignore@amnimal.ninja)
3120     test_to="testignore@iankelling.org, testignore@zroe.org, testignore@je.b8.nz"
3121     ;;&
3122   je)
3123     test_froms=(testignore@je.b8.nz)
3124     test_to="testignore@iankelling.org, testignore@zroe.org, testignore@expertpathologyreview.com, testignore@amnimal.ninja"
3125     ;;&
3126   $MAIL_HOST|bk|je)
3127     cat >/usr/local/bin/send-test-forward <<'EOF'
3128 #!/bin/bash
3129 olds=(
3130 $(/sbin/exiqgrep -o 260 -i -r '^(testignore@(iankelling\.org|zroe\.org|expertpathologyreview\.com|amnimal\.ninja|je\.b8\.nz)|jtuttle@gnu\.org)$')
3131 )
3132 if (( ${#olds[@]} )); then
3133   /sbin/exim -Mrm "${olds[@]}" >/dev/null
3134 fi
3135 EOF
3136     for test_from in ${test_froms[@]}; do
3137       cat >>/usr/local/bin/send-test-forward <<EOFOUTER
3138 /usr/sbin/exim -f $test_from -t <<EOF
3139 From: $test_from
3140 To: $test_to
3141 Subject: test \$(date +%Y-%m-%dT%H:%M:%S%z) \$(date +%s)
3142
3143 /usr/local/bin/send-test-forward
3144 EOF
3145 EOFOUTER
3146     done
3147     m chmod +x /usr/local/bin/send-test-forward
3148     ;;
3149   *)
3150     rm -fv /etc/cron.d/mailtest
3151     ;;
3152 esac
3153
3154
3155
3156 # * misc
3157 m sudo -u $u mkdir -p /home/$u/.cache
3158 set -- /m/mucache /home/$u/.cache/mu /m/.mu /home/$u/.mu
3159 while (($#)); do
3160   target=$1
3161   f=$2
3162   shift 2
3163   if [[ ! -L $f ]]; then
3164     if [[ -e $f ]]; then
3165       rm -rf $f
3166     fi
3167     m sudo -u $u ln -sf -T $target $f
3168   fi
3169 done
3170
3171
3172 # /etc/alias setup is debian specific, and exim postinst script sets up
3173 # an /etc/alias from root to the postmaster, based on the question
3174 # exim4-config exim4/dc_postmaster, as long as there exists an entry for
3175 # root, or there was no preexisting aliases file. postfix won\'t set up
3176 # a root to $postmaster alias if it\'s already installed. Easiest to
3177 # just set it ourselves.
3178
3179 # debconf question for postmaster:
3180 # Mail for the 'postmaster', 'root', and other system accounts needs to be redirected
3181 # to the user account of the actual system administrator.
3182 # If this value is left empty, such mail will be saved in /var/mail/mail, which is not
3183 # recommended.
3184 # Note that postmaster\'s mail should be read on the system to which it is directed,
3185 # rather than being forwarded elsewhere, so (at least one of) the users listed here
3186 # should not redirect their mail off this machine. A 'real-' prefix can be used to
3187 # force local delivery.
3188 # Multiple user names need to be separated by spaces.
3189 # Root and postmaster mail recipient:
3190
3191 m exit 0
3192 :
3193
3194 # Local Variables:
3195 # eval: (outline-minor-mode)
3196 # outline-regexp: "\\( *\\)# [*]\\{1,8\\} "
3197 # End:
3198 # this is combined with defining outline-level in init.el