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

   1 #!/bin/bash
   2 # * intro
   3 # Copyright (C) 2019 Ian Kelling
   4 # SPDX-License-Identifier: AGPL-3.0-or-later
   5
   6
   7 # todo: setup an alert for bouncing test emails.
   8
   9 # todo: bounces to my fsf mail can come from fsf@iankelling.org,
  10 # think about making bounces go from the original address.
  11
  12 # todo: add a prometheus alert for dovecot.
  13
  14 # todo: handle errors like this:
  15 # Mar 02 12:44:26 kw systemd[1]: exim4.service: Found left-over process 68210 (exim4) in control group while starting unit. Ignoring.
  16 # Mar 02 12:44:26 kw systemd[1]: This usually indicates unclean termination of a previous run, or service implementation deficiencies.
  17
  18 #  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.
  19 #  todo: consider hardening cups listening on 0.0.0.0
  20 #  todo: stop/disable local apache, and rpc.mountd, and kdeconnect when not in use.
  21
  22 # todo:  hosts should only allow external mail that is authed and
  23 # destined for backup route. it is a minor issue since traffic is
  24 # limited to the wghole network.
  25
  26 # todo: emailing info@amnimal.ninja produces a bounce, user doesn't exist
  27 # instead of a simple rejection like it should.
  28
  29 # todo: run mailping test after running, or otherwise
  30 # clear out terminal alert
  31
  32 # todo: disable postgrey
  33
  34 # todo: in testforward-check, we should also look
  35
  36 # todo: test that bounces dont help create valid mailtest-check
  37
  38 # todo: move mail stuff in distro-end into this file
  39
  40 # todo: consider rotating dkim & publishing key so every past email I sent
  41 # isnt necessarily signed
  42
  43 # todo: consider how to get clamav out of Debian-exim group
  44 # so it cant read/write the whole mail spool, for better
  45 # security.
  46
  47 # todo: create a cronjob to update or warn on expiring dnssec keys
  48
  49 # todo: we should test failed mail daily or so
  50 # failed cronjob, failed sysd-log-once,
  51 # a local bounce from a cronjob, a local bounce
  52 # to a bad remote address, perhaps a local failure
  53 # when the sending daemon is down.
  54 # And send an alert email if no alerts have been sent
  55 # in 2 or 3 days or something. todo, test cron mail on li.
  56
  57 # todo: look at mailinabox extra dns records, note these changelogs:
  58 # - 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.
  59 # - 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.
  60 #
  61
  62 # todo: mailtest-check failure on remote hosts is not going to alert me.
  63 # sort that out.
  64 # todo: test mail failure as well as success.
  65 #
  66 # todo: validate that mailtest-check is doing dnsbl checks.
  67
  68 # background: I want to run exim in a network namespace so it can send
  69 # and receive through a vpn. This is needed so it can do ipv6, because
  70 # outside the namespace if we dont have ipv6, to send ipv6 through the
  71 # vpn, we have to send all our ipv6 through the vpn. I did this for a
  72 # long time, it was fine, but it causes various pains, like increased
  73 # latency, increased recaptcha because my ip is from a data center, just
  74 # various issues I dont want on all the time. The problem with the
  75 # namespace is that all kinds of programs want to invoke exim, but they
  76 # wont be in the namespace. I could replace exim with a wrapper that
  77 # jumps into the namespace, i tried that, it works fine.  One remaining
  78 # problem was that I would have needed to hook into exim upgrades to
  79 # move exim and replace it with my wrapper script. Also, my script to
  80 # join the namespace is not super reliable because it uses a pgrep.
  81 # Instead, I should have created a systemd service for a process that
  82 # will never die and just writes its pid somewhere convenient.
  83 # That implementation
  84 # is below here:
  85 #
  86 # sudoers:
  87 # user ALL=(ALL) /usr/sbin/exim4
  88 #
  89 # move exim4 to eximian, use this script for exim4:
  90 #
  91 # #!/bin/bash
  92 # if ip a show veth1-mail &>/dev/null; then
  93 #   /usr/sbin/eximian "$@"
  94 #   exit
  95 # fi
  96 # dosudo=false
  97 # if [[ $USER && $USER != root ]]; then
  98 #   dosudo=true
  99 # fi
 100 # pid=$(pgrep -f "/usr/sbin/openvpn .* --config /etc/openvpn/.*mail.conf")
 101 # if $dosudo; then
 102 #   sudo nsenter -t $pid -n -m sudo -u $USER /usr/sbin/eximian "$@"
 103 # else
 104 #   nsenter -t $pid -n -m /usr/sbin/eximian "$@"
 105 # fi
 106 # ## end script
 107 #
 108 # an alternate solution: there is a small setguid program for
 109 # network namespaces in my bookmarks.
 110 #
 111 # However, the solution I went with is: have 2 exim
 112 # configs. A nonstandard location for the daemon that runs
 113 # in the namespace. For all other invocations, it uses
 114 # the default config location, which is altered to be
 115 # in a smarthost config which sends mail to the deaemon.
 116 #
 117 # I have a bash function, enn to invoke exim like the daemon is running.
 118 # and mailbash to just enter its network namespace.
 119
 120 if [ -z "$BASH_VERSION" ]; then echo "error: shell is not bash" >&2; exit 1; fi
 121
 122 shopt -s nullglob
 123
 124 if [[ -s /usr/local/lib/err ]]; then
 125   source /usr/local/lib/err
 126 elif [[ -s /a/bin/errhandle/err ]]; then
 127   source /a/bin/errhandle/err
 128 else
 129   err "no err tracing script found"
 130 fi
 131 source /a/bin/distro-functions/src/identify-distros
 132 source /a/bin/distro-functions/src/package-manager-abstractions
 133
 134 # has nextcloud_admin_pass in it
 135 f=/p/c/machine_specific/$HOSTNAME/mail
 136 if [[ -e $f ]]; then
 137   # shellcheck source=/p/c/machine_specific/bk/mail
 138   source $f
 139 fi
 140
 141
 142 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
 143
 144 # note, this is hardcoded in /etc/exim4/conf.d/main/000_local
 145 u=$(id -nu 1000)
 146
 147
 148 usage() {
 149   cat <<EOF
 150 Usage: ${0##*/} anything_here_to_debug
 151 Setup exim4 & dovecot & related things
 152
 153 -h|--help  Print help and exit.
 154 EOF
 155   exit $1
 156 }
 157
 158 # debug output if we pass any arg
 159 if (( $# )); then
 160   set -x
 161 fi
 162
 163
 164 ####### instructions for icedove #####
 165 # Incoming mail server: mail.iankelling.org, port 143, username iank, connection security starttls, authentication method normal password,
 166 # then click advanced so it accepts it.
 167 # we could also just use 127.0.0.1 with no ssl
 168 #
 169 # hamburger -> preferences -> preferences -> advanced tab -> config editor button -> security.ssl.enable_ocsp_must_staple = false
 170 # background: dovecot does not yet have ocsp stapling support
 171 # reference: https://community.letsencrypt.org/t/simple-guide-using-lets-encrypt-ssl-certs-with-dovecot/2921
 172 #
 173 # for phone, k9mail, fdroid, same thing but username alerts, pass in ivy-pass.
 174 # also, bk.b8.nz for secondary alerts, username is iank. same alerts pass.
 175 # fetching mail settings: folder poll frequency 10 minutes.
 176 # account settings, fetching mail, push folders: All. Then disable the persistent notification.
 177 #######
 178
 179
 180 # * perstent password instructions
 181 # Note: for cert cron, we need to manually run first to accept known_hosts
 182
 183 # # exim passwords:
 184 # # for hosts which have all private files I just use the same user
 185 # # for other hosts, each one get\'s their own password.
 186 # # for generating secure pass, and storing for server too:
 187 # f=$(mktemp)
 188 # host=tp
 189 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$f
 190 # s sed -i "/^$host:/d" /p/c/filesystem/etc/exim4/passwd
 191 # echo "$host:$(mkpasswd -m sha-512 -s <$f)" >>/p/c/filesystem/etc/exim4/passwd
 192 # #reference: exim4_passwd_client(5)
 193 # dir=/p/c/machine_specific/$host/filesystem/etc/exim4
 194 # mkdir -p $dir
 195 # echo "mail.iankelling.org:$host:$(<$f)" > $dir/passwd.client
 196 # # then run this script
 197
 198 # # dovecot password, i just need 1 as I\'m the only user
 199 # mkdir /p/c/filesystem/etc/dovecot
 200 # echo "iank:$(doveadm pw -s SHA512-CRYPT)::::::" >>/p/c/filesystem/etc/dovecot/users
 201
 202 ####### end perstent password instructions ######
 203
 204
 205 # * dkim dns
 206 # # Remove 1 level of comments in this section, set the domain var
 207 # # for the domain you are setting up, then run this and copy dns settings
 208 # # into dns.
 209 # domain=iankelling.org
 210 # c /p/c/filesystem/etc/exim4
 211 # # this has several bugs addressed in comments, but it was helpful
 212 # # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
 213
 214 # openssl genrsa -out $domain-private.pem 2048
 215 # # Then, to get the public key strings to put in bind:
 216
 217 # # selector is needed for having multiple keys for one domain.
 218 # # I dun do that, so just use a static one: li
 219 # # Debadmin page does not have v=, fastmail does, and this
 220 # # says it\'s recommended in 3.6.1, default is DKIM1 anyways.
 221 # # https://www.ietf.org/rfc/rfc6376.txt
 222 # # Join and print all but first and last line.
 223 # # last line: swap hold & pattern, remove newlines, print.
 224 # # lines 2+: append to hold space
 225 # echo "bind txt record: remember to truncate $domain so its relative to the bind zone"
 226 # cat <<EOF
 227 # a._domainkey.$domain  TXT     (
 228 # "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')" )
 229 # EOF
 230 # # sed explanation: skip the first few lines, then put them into the hold space, then
 231 # # on the last line, back to the patern space, remove the newlines, then add a newline
 232 # # at the last char - 240, because bind txt records need strings <=255 chars,
 233 # # other dkim stuff at the begining is is 25 chars, and the pubkey is 393, so this
 234 # # leaves us a bit of extra room at the end and a bunch at the beginning.
 235
 236 # # selector was also put into /etc/exim4/conf.d/main/000_local,
 237
 238 # * dmarc dns
 239
 240 # # 2017-02 dmarc policies:
 241 # # host -t txt _dmarc.gmail.com
 242 # # yahoo: p=reject, hotmail: p=none, gmail: p=none, fastmail none for legacy reasons
 243 # # there were articles claiming gmail would be  changing
 244 # # to p=reject, in early 2017, which didn\'t happen. I see no sources on them. It\'s
 245 # # expected to cause problems
 246 # # with a few old mailing lists, copying theirs for now.
 247 #
 248 # echo "dmarc dns, name: _dmarc value: v=DMARC1; p=none; rua=mailto:mailauth-reports@$domain"
 249
 250 # * other dns
 251
 252 # # 2017-02 spf policies:
 253 # # host -t txt lists.fedoraproject.org
 254 # # google ~all, hotmail ~all, yahoo: ?all, fastmail ?all, outlook ~all
 255 # # i include fastmail\'s settings, per their instructions,
 256 # # and follow their policy. In mail in a box, or similar instructions,
 257 # # I\'ve seen recommended to not use a restrictive policy.
 258
 259 # # to check if dns has updated, you do
 260 # host -a mesmtp._domainkey.$domain
 261
 262 # # mx records,
 263 # # setting it to iankelling.org would work the same, but this
 264 # # is more flexible, I could change where mail.iankelling.org pointed.
 265 # cat <<'EOF'
 266 # mx records, 2 records each, for * and empty domain
 267 # pri 10 mail.iankelling.org
 268 # EOF
 269
 270 # # dnssec
 271 # from brc2, run dnsecgen then dsign, update named.local.conf, publish keys to registrar
 272
 273 # * functions & constants
 274
 275 pre="${0##*/}:"
 276 m() { printf "$pre %s\n"  "$*"; "$@"; }
 277 e() { printf "$pre %s\n"  "$*"; }
 278 err() { printf "$pre %s\n"  "$*" >&2; exit 1; }
 279
 280 reload=false
 281 # This file is so if we fail in the middle and rerun, we dont lose state
 282 if [[ -e /var/local/mail-setup-reload ]]; then
 283   reload=true
 284 fi
 285 i() { # install file
 286   local tmp tmpdir dest="$1"
 287   local base="${dest##*/}"
 288   local dir="${dest%/*}"
 289   if [[ $dir != "$base" ]]; then
 290     # dest has a directory component
 291     mkdir -p "$dir"
 292   fi
 293   ir=false # i result
 294   tmpdir=$(mktemp -d)
 295   cat >$tmpdir/"$base"
 296   tmp=$(rsync -ic $tmpdir/"$base" "$dest")
 297   if [[ $tmp ]]; then
 298     printf "%s\n" "$tmp"
 299     ir=true
 300     if [[ $dest == /etc/systemd/system/* ]]; then
 301       touch /var/local/mail-setup-reload
 302       reload=true
 303     fi
 304   fi
 305   rm -rf $tmpdir
 306 }
 307 setini() {
 308   key="$1" value="$2" section="$3"
 309   file="/etc/radicale/config"
 310   sed -ri "/ *\[$section\]/,/^ *\[[^]]+\]/{/^\s*${key}[[:space:]=]/d};/ *\[$section\]/a $key = $value" "$file"
 311 }
 312 soff () {
 313   for service; do
 314     # ignore services that dont exist
 315     if systemctl cat $service &>/dev/null; then
 316       m systemctl disable --now $service
 317     fi
 318   done
 319 }
 320 sre() {
 321   for service; do
 322     m systemctl restart $service
 323     m systemctl enable $service;
 324   done
 325 }
 326 mailhost() {
 327   [[ $HOSTNAME == "$MAIL_HOST" ]]
 328 }
 329 e() { printf "%s\n" "$*"; }
 330 reifactive() {
 331   for service; do
 332     if systemctl is-active $service >/dev/null; then
 333       m systemctl restart $service
 334     fi
 335   done
 336 }
 337 stopifactive() {
 338   for service; do
 339     if systemctl is-active $service >/dev/null; then
 340       m systemctl stop $service
 341     fi
 342   done
 343 }
 344
 345 mxhost=mx.iankelling.org
 346 mxport=587
 347 forward=$u@$mxhost
 348
 349 # old setup. left as comment for example
 350 # mxhost=mail.messagingengine.com
 351 # mxport=587
 352 # forward=ian@iankelling.org
 353
 354 smarthost="$mxhost::$mxport"
 355 uhome=$(eval echo ~$u)
 356
 357 # Somehow on one machine, a file got written with 664 perms.
 358 # just being defensive here.
 359 umask 0022
 360
 361 source /a/bin/bash_unpublished/source-state
 362 if [[ ! $MAIL_HOST ]]; then
 363   err "\$MAIL_HOST not set"
 364 fi
 365
 366 bhost_t=false
 367 case $HOSTNAME in
 368   $MAIL_HOST) : ;;
 369   kd|frodo|x2|x3|kw|sy|bo)
 370     bhost_t=true
 371     ;;
 372 esac
 373
 374
 375 # * Install universal packages
 376
 377
 378 # installs epanicclean iptables-exim ip6tables-exim
 379 /a/bin/ds/install-my-scripts
 380
 381 if [[ $(debian-codename-compat) == bionic ]]; then
 382   cat >/etc/apt/preferences.d/spamassassin <<'EOF'
 383 Package: spamassassin sa-compile spamc
 384 Pin: release n=focal,o=Ubuntu
 385 Pin-Priority: 500
 386 EOF
 387 fi
 388
 389 # light version of exim does not have sasl auth support.
 390 # note: for bitfolk hosts, unbound has important config with conflink.
 391 pi-nostart exim4 exim4-daemon-heavy spamassassin unbound clamav-daemon wireguard
 392
 393 # note: pyzor debian readme says you need to run some initialization command
 394 # but its outdated.
 395 pi spf-tools-perl p0f postgrey pyzor razor jq moreutils certbot fail2ban
 396 case $HOSTNAME in
 397   je) : ;;
 398   # not included due to using wireguard: openvpn
 399   *) pi wget git unzip iptables ;;
 400 esac
 401 # bad packages that sometimes get automatically installed
 402 pu openresolv resolvconf
 403
 404 soff openvpn
 405
 406
 407 if [[ $(debian-codename) == etiona ]]; then
 408   # ip6tables stopped loading on boot. openvpn has reduced capability set,
 409   # so running iptables as part of openvpn startup wont work. This should do it.
 410   pi iptables-persistent
 411   cat >/etc/iptables/rules.v6 <<'EOF'
 412 *mangle
 413 COMMIT
 414 *nat
 415 COMMIT
 416 EOF
 417   # load it now.
 418   m ip6tables -S >/dev/null
 419 fi
 420
 421 # our nostart pi fails to avoid enabling
 422
 423
 424 # * Mail clean cronjob
 425
 426 i /etc/systemd/system/mailclean.timer <<'EOF'
 427 [Unit]
 428 Description=Run mailclean daily
 429
 430 [Timer]
 431 OnCalendar=monthly
 432
 433 [Install]
 434 WantedBy=timers.target
 435 EOF
 436
 437 i /etc/systemd/system/mailclean.service <<EOF
 438 [Unit]
 439 Description=Delete and archive old mail files
 440 After=multi-user.target
 441
 442 [Service]
 443 User=$u
 444 Type=oneshot
 445 ExecStart=/usr/local/bin/sysd-mail-once mailclean /a/bin/distro-setup/mailclean
 446 EOF
 447
 448 # * postgrey
 449
 450
 451 i /etc/default/postgrey <<'EOF'
 452 POSTGREY_OPTS="--exim --unix=/var/run/postgrey/postgrey.sock --retry-window=4 --max-age=60"
 453 EOF
 454
 455 # * clamav
 456
 457 m usermod -a -G Debian-exim clamav
 458
 459 i /etc/systemd/system/clamav-daemon.service.d/fix.conf <<EOF
 460 [Service]
 461 ExecStartPre=-/bin/mkdir /var/run/clamav
 462 ExecStartPre=/bin/chown clamav /var/run/clamav
 463 EOF
 464
 465 # * mail vpn config
 466
 467 # old.
 468 #vpnser=mailvpn.service
 469 # todo: this hangs if it cant resolv the endpoint. we
 470 # want it to just retry in the background.
 471 vpnser=wg-quick@wgmail.service
 472
 473 case $HOSTNAME in
 474   $MAIL_HOST)
 475     rsync -aiSAX --chown=root:root --chmod=g-s /p/c/filesystem/etc/wireguard/ /etc/wireguard
 476     bindpaths="/etc/127.0.0.1-resolv:/run/systemd/resolve /etc/basic-nsswitch:/etc/resolved-nsswitch:norbind"
 477     ;;&
 478   bk)
 479     bindpaths="/etc/10.173.8.1-resolv:/etc/127.0.0.1-resolv"
 480     ;;&
 481   *)
 482     d=/p/c/machine_specific/$HOSTNAME/filesystem/etc/wireguard/
 483     if [[ -d $d ]]; then
 484       rsync -aiSAX --chown=root:root --chmod=g-s $d  /etc/wireguard
 485     fi
 486     ;;
 487 esac
 488
 489 case $HOSTNAME in
 490   li) : ;;
 491   *)
 492     i /etc/systemd/system/wg-quick@wgmail.service.d/override.conf <<EOF
 493 [Unit]
 494 Requires=mailnn.service
 495 JoinsNamespaceOf=mailnn.service
 496 BindsTo=mailnn.service
 497 StartLimitIntervalSec=0
 498
 499 [Service]
 500 PrivateNetwork=true
 501 # i dont think we need any of these, but it doesnt hurt to stay consistent
 502 BindPaths=$bindpaths
 503
 504 Restart=on-failure
 505 RestartSec=20
 506 EOF
 507     ;;
 508 esac
 509
 510
 511 # https://selivan.github.io/2017/12/30/systemd-serice-always-restart.html
 512 i /etc/systemd/system/mailvpn.service <<EOF
 513 [Unit]
 514 Description=OpenVPN tunnel for mail
 515 After=syslog.target network-online.target mailnn.service
 516 Wants=network-online.target
 517 Documentation=man:openvpn(8)
 518 Documentation=https://community.openvpn.net/openvpn/wiki/Openvpn24ManPage
 519 Documentation=https://community.openvpn.net/openvpn/wiki/HOWTO
 520 # needed to continually restatr
 521 JoinsNamespaceOf=mailnn.service
 522 BindsTo=mailnn.service
 523 StartLimitIntervalSec=0
 524
 525 [Service]
 526 Type=notify
 527 RuntimeDirectory=openvpn-client
 528 RuntimeDirectoryMode=0710
 529 WorkingDirectory=/etc/openvpn/client
 530 ExecStart=/usr/sbin/openvpn --suppress-timestamps --nobind --config /etc/openvpn/client/mail.conf
 531 #CapabilityBoundingSet=CAP_IPC_LOCK CAP_NET_ADMIN CAP_NET_RAW CAP_SETGID CAP_SETUID CAP_SYS_CHROOT CAP_DAC_OVERRIDE
 532 LimitNPROC=10
 533 # DeviceAllow=/dev/null rw
 534 # DeviceAllow=/dev/net/tun rw
 535 PrivateNetwork=true
 536 # in the network namespace, we cant connect to systemd-resolved on 127.0.0.53,
 537 # because of
 538 # https://unix.stackexchange.com/questions/445782/how-to-allow-systemd-resolved-to-listen-to-an-interface-other-than-loopback
 539 # there is a workaround there, but i dont think its really worth it,
 540 # the mail server is fine with a static dns anyways.
 541 # This thread is also interesting,
 542 # https://github.com/slingamn/namespaced-openvpn/issues/7
 543 # todo: the iptables rule at the bottom could be useful to prevent
 544 # dns from leaking in my network namespaced vpn.
 545 # I also like the idea of patching systemd-resolved so it
 546 # will listen on other interfaces, but its not worth my time.
 547 BindPaths=$bindpaths
 548 Restart=always
 549 # time to sleep before restarting a service
 550 RestartSec=20
 551
 552 [Install]
 553 WantedBy=multi-user.target
 554 EOF
 555
 556 i /etc/systemd/system/mailnnroute.service <<'EOF'
 557 [Unit]
 558 Description=Network routing for mailnn
 559 After=syslog.target network-online.target mailnn.service
 560 Wants=network-online.target
 561 JoinsNamespaceOf=mailnn.service
 562 BindsTo=mailnn.service
 563 StartLimitIntervalSec=0
 564
 565 [Service]
 566 Type=simple
 567 RemainAfterExit=true
 568 PrivateNetwork=true
 569 ExecStart=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns -n 10.173.8 start mail
 570 ExecStop=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns stop mail
 571 Restart=always
 572 RestartSec=20
 573
 574
 575 [Install]
 576 WantedBy=multi-user.target
 577 EOF
 578
 579 #
 580 i /etc/systemd/system/mailnn.service <<'EOF'
 581 [Unit]
 582 Description=Network Namespace for mail vpn service that will live forever and cant fail
 583 After=syslog.target network-online.target
 584 Wants=network-online.target
 585
 586 [Service]
 587 Type=simple
 588 PrivateNetwork=true
 589 ExecStart=/bin/sleep infinity
 590
 591 [Install]
 592 WantedBy=multi-user.target
 593 EOF
 594
 595 i /etc/systemd/system/mailbindwatchdog.service <<EOF
 596 [Unit]
 597 Description=Watchdog to restart services relying on systemd-resolved dir
 598 After=syslog.target network-online.target
 599 Wants=network-online.target
 600 BindsTo=mailnn.service
 601
 602 [Service]
 603 Type=simple
 604 ExecStart=/usr/local/bin/mailbindwatchdog $vpnser ${nn_progs[@]} unbound.service radicale.service
 605 Restart=always
 606 # time to sleep before restarting a service
 607 RestartSec=10
 608
 609 [Install]
 610 WantedBy=multi-user.target
 611 EOF
 612
 613
 614
 615 # old service name
 616 rm -fv /etc/systemd/system/openvpn-client-mail@.service
 617
 618 # We use a local unbound because systemd-resolved wont accept our
 619 # request, it will only listen to 127.0.0.53 in the main network
 620 # namespace, and rejected feature requests to change that (although I
 621 # could change the code and recompile), but anyways, that could answer
 622 # with things specific to the lan that aren't applicable in this
 623 # namespace, and since unbound is a recursive resolver, it means we just
 624 # use our own ip against dnsbl rate limits.
 625 #
 626 # If we ever notice this change, chattr +i on it
 627 # trust-ad is used in t10+, glibc 2.31
 628
 629 i /etc/127.0.0.1-resolv/stub-resolv.conf <<'EOF'
 630 nameserver 127.0.0.1
 631 options edns0 trust-ad
 632 EOF
 633
 634 i /etc/127.0.0.53-resolv/stub-resolv.conf <<'EOF'
 635 nameserver 127.0.0.53
 636 options edns0 trust-ad
 637 EOF
 638
 639
 640 i /etc/10.173.8.1-resolv/stub-resolv.conf <<'EOF'
 641 nameserver 10.173.8.1
 642 options edns0 trust-ad
 643 EOF
 644
 645 # this is just a bug fix for trisquel.
 646 f=/etc/apparmor.d/usr.sbin.unbound
 647 line="/usr/sbin/unbound flags=(attach_disconnected) {"
 648 if ! grep -qFx "$line" $f; then
 649   badline="/usr/sbin/unbound {"
 650   if ! grep -qFx "$badline" $f; then
 651     err expected line in $f not found
 652   fi
 653   sed -i "s,^$badline$,$line," $f
 654   if systemctl is-active apparmor &>/dev/null; then
 655     m systemctl reload apparmor
 656   fi
 657 fi
 658
 659 # note: anything added to nn_progs needs corresponding rm
 660 # down below in the host switch
 661 nn_progs=(exim4)
 662 if mailhost; then
 663   # Note dovecots lmtp doesnt need to be in the same nn to accept delivery.
 664   # Its in the nn so remote clients can connect to it.
 665   nn_progs+=(spamassassin dovecot)
 666 fi
 667
 668 case $HOSTNAME in
 669   $MAIL_HOST)
 670     # todo, should this be after vpn service
 671     i /etc/systemd/system/unbound.service.d/nn.conf <<EOF
 672 [Unit]
 673 After=mailnn.service
 674 JoinsNamespaceOf=mailnn.service
 675 BindsTo=mailnn.service
 676 StartLimitIntervalSec=0
 677
 678 [Service]
 679 PrivateNetwork=true
 680 # note the nsswitch bind is actually not needed for bk, but
 681 # its the same file so it does no harm.
 682 BindPaths=$bindpaths
 683
 684 Restart=always
 685 RestartSec=20
 686 EOF
 687
 688     # sooo, there are a few ways to get traffic from the mail network
 689     # namespace to go over the wghole.
 690     #
 691     #1: unify the mail vpn and wghole
 692     # into 1 network.  this seems simple and logical, so I'm doing it.
 693     # One general downside is tying things together, if I need to mess
 694     # with one thing, it breaks the other. Oh well for now.
 695     #
 696     # 2. We can route 10.5.3.0/24 out of the mail nn and nat it into wghole.
 697     #
 698     # 3. We can setup the routing to happen on li, which seemed like I
 699     # just needed to add 10.8.0.4/24 to AllowedIPs in at least the
 700     # wghole clients, but I think that is kind of hacky and breaks ipv4
 701     # routing within the mailvpn, it happened to work just because exim
 702     # prefers ipv6 and that was also available in the mailvpn.
 703     #
 704     # 4. Put the hole interface into the mail network namespace. This
 705     # doesn't work if the mail vpn is wg.  For openvpn, it bypasses the
 706     # vpn routing and establishes a direct connection.  I only use the
 707     # hole vpn for randomish things, it should be fine to join the mail
 708     # nn for that. There should be some way to fix the routing issue
 709     # by doing manual routing, but that doesn't seem like a good use of time.
 710     # relevant:
 711     # https://www.wireguard.com/netns/#
 712     #
 713     # for wireguard debugging
 714     # echo module wireguard +p > /sys/kernel/debug/dynamic_debug/control
 715     # dmesg -w
 716
 717     ;;&
 718   $MAIL_HOST|bk)
 719     for unit in ${nn_progs[@]}; do
 720       i /etc/systemd/system/$unit.service.d/nn.conf <<EOF
 721 [Unit]
 722
 723 # Wants appears better than requires because with requires,
 724 # if the vpnser fails to start, this service won't get run at
 725 # all, even if the vpnser starts on an automatic restart.
 726
 727 Wants=$vpnser
 728 After=network.target mailnn.service $vpnser
 729 JoinsNamespaceOf=mailnn.service
 730 BindsTo=mailnn.service
 731 StartLimitIntervalSec=0
 732
 733 [Service]
 734 PrivateNetwork=true
 735 # note the nsswitch bind is actually not needed for bk, but
 736 # its the same file so it does no harm.
 737 BindPaths=$bindpaths
 738
 739 Restart=always
 740 RestartSec=20
 741 EOF
 742     done
 743     ;;
 744   *)
 745     for unit in exim4 spamassassin dovecot unbound; do
 746       f=/etc/systemd/system/$unit.service.d/nn.conf
 747       if [[ -s $f ]]; then
 748         rm -fv $f
 749         reload=true
 750       fi
 751     done
 752     ;;
 753 esac
 754
 755 # * spamassassin config
 756 i /etc/sysctl.d/80-iank-mail.conf <<'EOF'
 757 # see exim spec
 758 net.netfilter.nf_conntrack_tcp_timeout_close_wait = 120
 759 EOF
 760 if $ir; then
 761   m sysctl -p
 762 fi
 763
 764 i /etc/spamassassin/mylocal.cf <<'EOF'
 765 # this is mylocal.cf because the normal local.cf has a bunch of upstream stuff i dont want to mess with
 766
 767 # /usr/share/doc/exim4-base/README.Debian.gz:
 768 #   SpamAssassin's default report should not be used in a add_header
 769 #   statement since it contains empty lines. (This triggers e.g. Amavis'
 770 #   warning "BAD HEADER SECTION, Improper folded header field made up
 771 #   entirely of whitespace".) This is a safe, terse alternative:
 772 clear_report_template
 773 report (_SCORE_ / _REQD_ requ) _TESTSSCORES(,)_ autolearn=_AUTOLEARN
 774 uridnsbl_skip_domain iankelling.org
 775 uridnsbl_skip_domain amnimal.ninja
 776 uridnsbl_skip_domain expertpathologyreview.com
 777 uridnsbl_skip_domain zroe.org
 778 EOF
 779
 780 # 2020-10-19 remove old file. remove this when all hosts updated
 781 rm -fv /etc/systemd/system/spamddnsfix.{timer,service}
 782
 783 i /etc/default/spamassassin <<'EOF'
 784 # defaults plus debugging flags for an issue im having
 785 OPTIONS="--create-prefs --max-children 5 --helper-home-dir"
 786 PIDFILE="/var/run/spamd.pid"
 787 # my additions
 788 NICE="--nicelevel 15"
 789 CRON=1
 790 EOF
 791 #####   end spamassassin config
 792
 793
 794 # * Update mail cert
 795 if [[ -e /p/c/filesystem ]]; then
 796   # note, man openvpn implies we could just call mail-route on vpn startup/shutdown with
 797   # systemd, buuut it can remake the tun device unexpectedly, i got this in the log
 798   # after my internet was down for a bit:
 799   # NOTE: Pulled options changed on restart, will need to close and reopen TUN/TAP device.
 800   m /a/exe/vpn-mk-client-cert -b mailclient -n mail li.iankelling.org
 801 fi
 802
 803 # With openvpn, I didn't get around to persisting the openvpn
 804 # cert/configs into /p/c/machine_specific/bk, so I had this case to
 805 # manually get the cert. However, we aren't using openvpn anymore, so it
 806 # is commented out.
 807 #
 808 # case $HOSTNAME in
 809 #   bk)
 810 #     if [[ ! -e /etc/openvpn/client/mail.conf ]]; then
 811 #       echo "$0: error: first, on a system with /p/c/filesystem, run mail-setup, or the vpn-mk-client-cert line above this err" 2>&2
 812 #       exit 1
 813 #     fi
 814 #     ;;
 815 # esac
 816
 817 m rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/mail-cert-cron /usr/local/bin
 818
 819 i /etc/systemd/system/mailcert.service <<'EOF'
 820 [Unit]
 821 Description=Mail cert rsync
 822 After=multi-user.target
 823
 824 [Service]
 825 Type=oneshot
 826 ExecStart=/usr/local/bin/sysd-mail-once mailcert /usr/local/bin/mail-cert-cron
 827 EOF
 828 i /etc/systemd/system/mailcert.timer <<'EOF'
 829 [Unit]
 830 Description=Run mail-cert once a day
 831
 832 [Timer]
 833 OnCalendar=daily
 834
 835 [Install]
 836 WantedBy=timers.target
 837 EOF
 838
 839
 840 wghost=${HOSTNAME}wg.b8.nz
 841 if $bhost_t && [[ ! -e /etc/exim4/certs/$wghost/privkey.pem ]]; then
 842   certbot -n --manual-public-ip-logging-ok --eff-email --agree-tos -m letsencrypt@iankelling.org \
 843           certonly --manual --preferred-challenges=dns \
 844           --manual-auth-hook /a/bin/ds/le-dns-challenge \
 845           --manual-cleanup-hook /a/bin/ds/le-dns-challenge-cleanup \
 846           --deploy-hook /a/bin/ds/le-exim-deploy -d $wghost
 847 fi
 848
 849 # * fail2ban
 850
 851 # todo: test that these configs actually work, eg run
 852 # s iptables-exim -S
 853 # and see someone is banned.
 854
 855 sed 's/^ *before *= *iptables-common.conf/before = iptables-common-exim.conf/' \
 856     /etc/fail2ban/action.d/iptables-multiport.conf| i /etc/fail2ban/action.d/iptables-exim.conf
 857 i /etc/fail2ban/action.d/iptables-common-exim.conf <<'EOF'
 858 # iank: same as iptables-common, except iptables is iptables-exim, ip6tables is ip6tables-exim
 859
 860 # Fail2Ban configuration file
 861 #
 862 # Author: Daniel Black
 863 #
 864 # This is a included configuration file and includes the definitions for the iptables
 865 # used in all iptables based actions by default.
 866 #
 867 # The user can override the defaults in iptables-common.local
 868 #
 869 # Modified: Alexander Koeppe <format_c@online.de>, Serg G. Brester <serg.brester@sebres.de>
 870 #       made config file IPv6 capable (see new section Init?family=inet6)
 871
 872 [INCLUDES]
 873
 874 after = iptables-blocktype.local
 875         iptables-common.local
 876 # iptables-blocktype.local is obsolete
 877
 878 [Definition]
 879
 880 # Option:  actionflush
 881 # Notes.:  command executed once to flush IPS, by shutdown (resp. by stop of the jail or this action)
 882 # Values:  CMD
 883 #
 884 actionflush = <iptables> -F f2b-<name>
 885
 886
 887 [Init]
 888
 889 # Option:  chain
 890 # Notes    specifies the iptables chain to which the Fail2Ban rules should be
 891 #          added
 892 # Values:  STRING  Default: INPUT
 893 chain = INPUT
 894
 895 # Default name of the chain
 896 #
 897 name = default
 898
 899 # Option:  port
 900 # Notes.:  specifies port to monitor
 901 # Values:  [ NUM | STRING ]  Default:
 902 #
 903 port = ssh
 904
 905 # Option:  protocol
 906 # Notes.:  internally used by config reader for interpolations.
 907 # Values:  [ tcp | udp | icmp | all ] Default: tcp
 908 #
 909 protocol = tcp
 910
 911 # Option:  blocktype
 912 # Note:    This is what the action does with rules. This can be any jump target
 913 #          as per the iptables man page (section 8). Common values are DROP
 914 #          REJECT, REJECT --reject-with icmp-port-unreachable
 915 # Values:  STRING
 916 blocktype = REJECT --reject-with icmp-port-unreachable
 917
 918 # Option:  returntype
 919 # Note:    This is the default rule on "actionstart". This should be RETURN
 920 #          in all (blocking) actions, except REJECT in allowing actions.
 921 # Values:  STRING
 922 returntype = RETURN
 923
 924 # Option:  lockingopt
 925 # Notes.:  Option was introduced to iptables to prevent multiple instances from
 926 #          running concurrently and causing irratic behavior.  -w was introduced
 927 #          in iptables 1.4.20, so might be absent on older systems
 928 #          See https://github.com/fail2ban/fail2ban/issues/1122
 929 # Values:  STRING
 930 lockingopt = -w
 931
 932 # Option:  iptables
 933 # Notes.:  Actual command to be executed, including common to all calls options
 934 # Values:  STRING
 935 iptables = /usr/local/bin/iptables-exim <lockingopt>
 936
 937
 938 [Init?family=inet6]
 939
 940 # Option:  blocktype (ipv6)
 941 # Note:    This is what the action does with rules. This can be any jump target
 942 #          as per the iptables man page (section 8). Common values are DROP
 943 #          REJECT, REJECT --reject-with icmp6-port-unreachable
 944 # Values:  STRING
 945 blocktype = REJECT --reject-with icmp6-port-unreachable
 946
 947 # Option:  iptables (ipv6)
 948 # Notes.:  Actual command to be executed, including common to all calls options
 949 # Values:  STRING
 950 iptables = /usr/local/bin/ip6tables-exim <lockingopt>
 951 EOF
 952
 953 i /etc/fail2ban/jail.d/exim.local <<'EOF'
 954 [exim]
 955 enabled  = true
 956 port     = 25,587
 957 filter   = exim
 958 banaction = iptables-exim
 959
 960 # 209.51.188.13 = mail.fsf.org
 961 # 2001:470:142::13 = mail.fsf.org
 962 # 209.51.188.92 = eggs.gnu.org
 963 # 2001:470:142:3::10 = eggs.gnu.org
 964 # 72.14.176.105 2600:3c00:e000:280::2 = mail.iankelling.org
 965 # 10.173.8.1 = non-nn net
 966 ignoreip = 209.51.188.13 2001:470:142::13 209.51.188.92 2001:470:142:3::10 72.14.176.105 2600:3c00:e000:280::2 10.173.8.1
 967 EOF
 968 if $ir; then
 969   m systemctl restart fail2ban
 970 fi
 971
 972 # * common exim4 config
 973
 974
 975 ## old, not using forward files anymore
 976 rm -fv $uhome/.forward /root/.forward
 977
 978
 979 # Make all system users be aliases. preventative
 980 # prevents things like cron mail for user without alias
 981 awk 'BEGIN { FS = ":" } ; $6 !~ /^\/home/ || $7 ~ /\/nologin$/  { print $1 }' /etc/passwd| while read -r user; do
 982   if [[ ! $user ]]; then
 983     continue
 984   fi
 985   if ! grep -q "^$user:" /etc/aliases; then
 986     echo "$user: root" |m tee -a /etc/aliases
 987   fi
 988 done
 989
 990
 991 awk 'BEGIN { FS = ":" } ; $6 ~ /^\/home/ && $7 !~ /\/nologin$/ { print $1 }' /etc/passwd| while read -r user; do
 992   case $HOSTNAME in
 993     $MAIL_HOST)
 994       sed -i "/^user:/d" /etc/aliases
 995       ;;
 996     *)
 997       if ! grep -q "^$user:" /etc/aliases; then
 998         echo "$user: root" |m tee -a /etc/aliases
 999       fi
1000       ;;
1001   esac
1002 done
1003
1004 if ! grep -q "^ncsoft:" /etc/aliases; then
1005   echo "ncsoft: graceq2323@gmail.com" |m tee -a /etc/aliases
1006 fi
1007
1008
1009
1010 m gpasswd -a iank adm #needed for reading logs
1011
1012 ### make local bounces go to normal maildir
1013 # local mail that bounces goes to /Maildir or /root/Maildir
1014 dirs=(/m/md/bounces/{cur,tmp,new})
1015 m mkdir -p ${dirs[@]}
1016 m chown iank:iank /m /m/md
1017 m ln -sfT /m/md /m/iank
1018 m chmod 771 /m /m/md
1019 m chown -R $u:Debian-exim /m/md/bounces
1020 m chmod 775 ${dirs[@]}
1021 m usermod -a -G Debian-exim $u
1022 for d in /Maildir /root/Maildir; do
1023   if [[ ! -L $d ]]; then
1024     m rm -rf $d
1025   fi
1026   m ln -sf -T /m/md/bounces $d
1027 done
1028
1029 # dkim, client passwd file
1030 files=(/p/c/machine_specific/$HOSTNAME/filesystem/etc/exim4/*)
1031 f=/p/c/filesystem/etc/exim4/passwd.client
1032 if [[ -e $f ]]; then
1033   files+=($f)
1034 fi
1035 if (( ${#files[@]} )); then
1036   m rsync -ahhi --chown=root:Debian-exim --chmod=0640 \
1037     ${files[@]} /etc/exim4
1038 fi
1039
1040 # By default, only 10 days of logs are kept. increase that.
1041 # And dont compress, I look back at logs too often and
1042 # dont need the annoyance of decompressing them all the time.
1043 m sed -ri '/^\s*compress\s*$/d;s/^(\s*rotate\s).*/\11000/' /etc/logrotate.d/exim4-base
1044 files=(/var/log/exim4/*.gz)
1045 if (( ${#files[@]} )); then
1046   gunzip ${files[@]}
1047 fi
1048
1049 ## disabled. not using .forward files, but this is still interesting
1050 ## for reference.
1051 # ## https://blog.dhampir.no/content/make-exim4-on-debian-respect-forward-and-etcaliases-when-using-a-smarthost
1052 # # i only need .forwards, so just doing that one.
1053 # cd /etc/exim4/conf.d/router
1054 # b=userforward_higher_priority
1055 # # replace the router name so it is unique
1056 # sed -r s/^\\S+:/$b:/ 600_exim4-config_userforward >175_$b
1057 rm -fv /etc/exim4/conf.d/router/175_userforward_higher_priority
1058
1059 # todo, consider 'separate' in etc/exim4.conf, could it help on busy systems?
1060
1061 # alerts is basically the postmaster address
1062 m sed -i --follow-symlinks -f - /etc/aliases <<EOF
1063 \$a root: alerts@iankelling.org
1064 /^root:/d
1065 EOF
1066
1067 cat >/etc/exim4/conf.d/rewrite/34_iank_rewriting <<'EOF'
1068 ncsoft@zroe.org graceq2323@gmail.com hE
1069 EOF
1070
1071 # old name
1072 rm -fv /etc/exim4/conf.d/retry/37_retry
1073
1074 cat >/etc/exim4/conf.d/retry/17_retry <<'EOF'
1075 # Retry fast for my own domains
1076 iankelling.org * F,1d,4m;F,14d,1h
1077 amnimal.ninja * F,1d,4m;F,14d,1h
1078 expertpathologyreview.com * F,1d,4m;F,14d,1h
1079 je.b8.nz * F,1d,4m;F,14d,1h
1080 zroe.org * F,1d,4m;F,14d,1h
1081 eximbackup.b8.nz * F,1d,4m;F,14d,1h
1082
1083 # The spec says the target domain will be used for temporary host errors,
1084 # but i've found that isn't correct, the hostname is required
1085 # at least sometimes.
1086 nn.b8.nz * F,1d,4m;F,14d,1h
1087 defaultnn.b8.nz * F,1d,4m;F,14d,1h
1088 mx.iankelling.org * F,1d,4m;F,14d,1h
1089 bk.b8.nz * F,1d,4m;F,14d,1h
1090 eggs.gnu.org * F,1d,4m;F,14d,1h
1091 fencepost.gnu.org * F,1d,4m;F,14d,1h
1092
1093 # afaik our retry doesnt need this, but just using everything
1094 mx.amnimal.ninja * F,1d,4m;F,14d,1h
1095 mx.expertpathologyreview.com * F,1d,4m;F,14d,1h
1096
1097
1098 mail.fsf.org * F,1d,15m;F,14d,1h
1099 EOF
1100
1101
1102 rm -vf /etc/exim4/conf.d/main/000_localmacros # old filename
1103
1104 # separate file so without quoted EOF for convenience
1105 cat >/etc/exim4/conf.d/main/000_local2 <<EOF
1106 # normally empty, I set this so I can set the envelope address
1107 # when doing mail redelivery to invoke filters. Also allows
1108 # me exiqgrep and stuff.
1109 MAIN_TRUSTED_GROUPS = $u
1110 EOF
1111
1112 cat >/etc/exim4/conf.d/main/000_local <<'EOF'
1113 MAIN_TLS_ENABLE = true
1114
1115 # require tls connections for all smarthosts
1116 REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS = *
1117
1118 # debian exim config added this in 2016 or so?
1119 # it's part of the smtp spec, to limit lines to 998 chars
1120 # but a fair amount of legit mail does not adhere to it. I don't think
1121 # this should be default, like it says in
1122 # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=828801
1123 # todo: the bug for introducing this was about headers, but
1124 # the fix maybe is for all lines? one says gmail rejects, the
1125 # other says gmail does not reject. figure out and open a new bug.
1126 IGNORE_SMTP_LINE_LENGTH_LIMIT = true
1127
1128 # more verbose logs
1129 MAIN_LOG_SELECTOR = +all
1130
1131 # Based on spec, seems like a good idea to be nice.
1132 smtp_return_error_details = true
1133
1134 # default is 10. when exim has been down for a bit, fsf mailserver
1135 # will do a big send in one connection, then exim decides to put
1136 # the messages in the queue instead of delivering them, to avoid
1137 # spawning too many delivery processes. This is the same as the
1138 # fsfs value. And the corresponding one for how many messages
1139 # to send out in 1 connection remote_max_parallel = 256
1140 smtp_accept_queue_per_connection = 500
1141
1142
1143 DKIM_CANON = relaxed
1144 DKIM_SELECTOR = li
1145
1146 # from comments in
1147 # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
1148 # and its best for this to align https://tools.ietf.org/html/rfc7489#page-8
1149 # There could be some circumstance when the
1150 # from: isnt our domain, but the envelope sender is
1151 # and so still want to sign, but I cant think of any case.
1152 DKIM_DOMAIN = ${lc:${domain:$rh_from:}}
1153 # The file is based on the outgoing domain-name in the from-header.
1154 # sign if key exists
1155 DKIM_PRIVATE_KEY = ${if exists{/etc/exim4/${dkim_domain}-private.pem} {/etc/exim4/${dkim_domain}-private.pem}}
1156
1157 # most of the ones that gmail seems to use.
1158 # Exim has horrible default of signing unincluded
1159 # list- headers since they got mentioned in an
1160 # rfc, but this messes up mailing lists, like gnu/debian which want to
1161 # keep your dkim signature intact but add list- headers.
1162 DKIM_SIGN_HEADERS = mime-version:in-reply-to:references:from:date:subject:to
1163
1164 domainlist local_hostnames = ! je.b8.nz : ! bk.b8.nz : *.b8.nz : b8.nz
1165
1166 hostlist iank_trusted = <; \
1167 # veth0
1168 10.173.8.1 ; \
1169 # li li_ip6
1170 72.14.176.105 ; 2600:3c00::f03c:91ff:fe6d:baf8 ; \
1171 # li_vpn_net li_vpn_net_ip6s
1172 10.8.0.0/24; 2600:3c00:e000:280::/64 ; 2600:3c00:e002:3800::/56 ;  \
1173 # bk bk_ip6
1174 85.119.83.50 ; 2001:ba8:1f1:f0c9::2 ; \
1175 # je je_ipv6
1176 85.119.82.128 ; 2001:ba8:1f1:f09d::2 ; \
1177 # fsf_mit_net fsf_mit_net_ip6 fsf_net fsf_net_ip6 fsf_office_net
1178 18.4.89.0/24 ; 2603:3005:71a:2e00::/64 ; 209.51.188.0/24 ; 2001:470:142::/48 ; 74.94.156.208/28
1179
1180
1181 # this is the default delay_warning_condition, plus matching on local_domains.
1182 # If I have some problem with my local system that causes delayed delivery,
1183 # I dont want to send warnings out to non-local domains.
1184 delay_warning_condition = ${if or {\
1185   { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} }\
1186   { match{$h_precedence:}{(?i)bulk|list|junk} }\
1187   { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} }\
1188   { match_domain{$domain}{+local_domains} }\
1189   } {no}{yes}}
1190 EOF
1191
1192 rm -fv /etc/exim4/rcpt_local_acl # old path
1193
1194 i /etc/exim4/conf.d/local_deny_exceptions_acl <<'EOF'
1195 # This acl already exists in rcpt, this just makes it more widespread.
1196 # See the comment there for its rationale. The reason it needs to be
1197 # more widespread is that I've turned on sender verification, but cron
1198 # emails can fail sender verification since I may be in a network that
1199 # doesn't have my local dns.
1200 accept
1201   authenticated = *
1202
1203 # i setup a local programs smtp to mail.iankelling.org, this
1204 # skips sender verification for it.
1205 accept
1206   hosts = 10.173.8.1
1207 EOF
1208
1209 rm -fv /etc/exim4/data_local_acl # old path
1210
1211 i /etc/exim4/conf.d/data_local_acl <<'EOF'
1212 # Except for the "condition =", this was
1213 # a comment in the check_data acl. The comment about this not
1214 # being suitable has been changed in newer exim versions. The only thing
1215 # related I found was to
1216 # add the condition =, cuz spamassassin has problems with big
1217 # messages and spammers don't bother with big messages,
1218 # but I've increased the size from 10k
1219 # suggested in official docs, and 100k in the wiki example because
1220 # those docs are rather old and I see a 110k spam message
1221 # pretty quickly looking through my spam folder.
1222
1223 warn
1224   !hosts = +iank_trusted
1225   remove_header = X-Spam_score: X-Spam_score_int : X-Spam_bar : X-Spam_report
1226
1227 warn
1228   !hosts = +iank_trusted
1229   # Smarthosts connect with residential ips and thus get flagged as spam if we do a spam check.
1230   !authenticated = plain_server:login_server
1231   condition = ${if < {$message_size}{5000K}}
1232   spam = Debian-exim:true
1233   add_header = X-Spam_score_int: $spam_score_int
1234   add_header = X-Spam_score: $spam_score
1235   add_header = X-Spam_bar: $spam_bar
1236   add_header = X-Spam_report: $spam_report
1237   add_header = X-Spam_action: $spam_action
1238
1239 warn
1240   !hosts = +iank_trusted
1241   !authenticated = plain_server:login_server
1242   condition = ${if def:malware_name}
1243   remove_header = Subject:
1244   add_header = Subject: [Clamav warning: $malware_name] $h_subject
1245   log_message = heuristic malware warning: $malware_name
1246
1247 #accept
1248 #  spf = pass:fail:softfail:none:neutral:permerror:temperror
1249 #  dmarc_status = reject:quarantine
1250 #  add_header = Reply-to: dmarctest@iankelling.org
1251
1252 EOF
1253
1254 i /etc/exim4/conf.d/router/900_exim4-config_local_user <<'EOF'
1255 ### router/900_exim4-config_local_user
1256 #################################
1257
1258 # This router matches local user mailboxes. If the router fails, the error
1259 # message is "Unknown user".
1260 local_user:
1261   debug_print = "R: local_user for $local_part@$domain"
1262   driver = accept
1263   domains = +local_domains
1264 # ian: default file except where mentioned.
1265 # ian: commented this. I get all local parts. for bk, an rcpt
1266 # check handles checking with dovecot, and the only router
1267 # after this is root.
1268 #  local_parts = ! root
1269   transport = LOCAL_DELIVERY
1270   cannot_route_message = Unknown user
1271 # ian: added for + addressing.
1272   local_part_suffix = +*
1273   local_part_suffix_optional
1274 EOF
1275 i /etc/exim4/conf.d/transport/30_exim4-config_dovecot_lmtp <<'EOF'
1276 dovecot_lmtp:
1277   driver = lmtp
1278   socket = /var/run/dovecot/lmtp
1279   #maximum number of deliveries per batch, default 1
1280   batch_max = 200
1281   envelope_to_add
1282 EOF
1283
1284 i /etc/exim4/conf.d/transport/30_remote_smtp_vpn <<'EOF'
1285 # same as debians 30_exim4-config_remote_smtp, but
1286 # with interface added at the end.
1287
1288 remote_smtp_vpn:
1289   debug_print = "T: remote_smtp_vpn for $local_part@$domain"
1290   driver = smtp
1291 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
1292   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
1293 .endif
1294 .ifdef REMOTE_SMTP_HOSTS_AVOID_TLS
1295   hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
1296 .endif
1297 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1298   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1299 .endif
1300 .ifdef REMOTE_SMTP_RETURN_PATH
1301   return_path = REMOTE_SMTP_RETURN_PATH
1302 .endif
1303 .ifdef REMOTE_SMTP_HELO_DATA
1304   helo_data=REMOTE_SMTP_HELO_DATA
1305 .endif
1306 .ifdef DKIM_DOMAIN
1307 dkim_domain = DKIM_DOMAIN
1308 .endif
1309 .ifdef DKIM_SELECTOR
1310 dkim_selector = DKIM_SELECTOR
1311 .endif
1312 .ifdef DKIM_PRIVATE_KEY
1313 dkim_private_key = DKIM_PRIVATE_KEY
1314 .endif
1315 .ifdef DKIM_CANON
1316 dkim_canon = DKIM_CANON
1317 .endif
1318 .ifdef DKIM_STRICT
1319 dkim_strict = DKIM_STRICT
1320 .endif
1321 .ifdef DKIM_SIGN_HEADERS
1322 dkim_sign_headers = DKIM_SIGN_HEADERS
1323 .endif
1324 .ifdef TLS_DH_MIN_BITS
1325 tls_dh_min_bits = TLS_DH_MIN_BITS
1326 .endif
1327 .ifdef REMOTE_SMTP_TLS_CERTIFICATE
1328 tls_certificate = REMOTE_SMTP_TLS_CERTIFICATE
1329 .endif
1330 .ifdef REMOTE_SMTP_PRIVATEKEY
1331 tls_privatekey = REMOTE_SMTP_PRIVATEKEY
1332 .endif
1333 .ifdef REMOTE_SMTP_HOSTS_REQUIRE_TLS
1334   hosts_require_tls = REMOTE_SMTP_HOSTS_REQUIRE_TLS
1335 .endif
1336 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1337   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1338 .endif
1339   interface = <; 10.8.0.4 ; 2600:3c00:e002:3800::4
1340 EOF
1341
1342 i /etc/exim4/conf.d/transport/30_smarthost_dkim <<'EOF'
1343 # ian: this is remote_smtp_smarthost plus the dkim parts from remote_smtp
1344
1345 smarthost_dkim:
1346   debug_print = "T: remote_smtp_smarthost for $local_part@$domain"
1347   driver = smtp
1348   multi_domain
1349 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
1350   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
1351 .endif
1352   hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \
1353         {\
1354         ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\
1355         }\
1356         {} \
1357       }
1358 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1359   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1360 .endif
1361 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1362   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1363 .endif
1364 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1365   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1366 .endif
1367 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1368   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
1369 .endif
1370 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1371   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1372 .endif
1373 .ifdef REMOTE_SMTP_RETURN_PATH
1374   return_path = REMOTE_SMTP_RETURN_PATH
1375 .endif
1376 .ifdef REMOTE_SMTP_HELO_DATA
1377   helo_data=REMOTE_SMTP_HELO_DATA
1378 .endif
1379 .ifdef TLS_DH_MIN_BITS
1380 tls_dh_min_bits = TLS_DH_MIN_BITS
1381 .endif
1382 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1383 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1384 .endif
1385 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1386 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1387 .endif
1388 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1389   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1390 .endif
1391 .ifdef DKIM_DOMAIN
1392 dkim_domain = DKIM_DOMAIN
1393 .endif
1394 .ifdef DKIM_SELECTOR
1395 dkim_selector = DKIM_SELECTOR
1396 .endif
1397 .ifdef DKIM_PRIVATE_KEY
1398 dkim_private_key = DKIM_PRIVATE_KEY
1399 .endif
1400 .ifdef DKIM_CANON
1401 dkim_canon = DKIM_CANON
1402 .endif
1403 .ifdef DKIM_STRICT
1404 dkim_strict = DKIM_STRICT
1405 .endif
1406 .ifdef DKIM_SIGN_HEADERS
1407 dkim_sign_headers = DKIM_SIGN_HEADERS
1408 .endif
1409 EOF
1410
1411
1412 cat >/etc/exim4/update-exim4.conf.conf  <<'EOF'
1413 # default stuff, i havent checked if its needed
1414 dc_minimaldns='false'
1415 dc_relay_nets=''
1416 CFILEMODE='644'
1417 dc_use_split_config='true'
1418 dc_mailname_in_oh='true'
1419 EOF
1420
1421
1422 # * radicale
1423 if mailhost; then
1424   if ! mountpoint /o; then
1425     echo "error /o is not a mountpoint" >&2
1426     exit 1
1427   fi
1428
1429   # davx/davdroid setup instructions at the bottom
1430
1431   # main docs:
1432   # http://radicale.org/user_documentation/
1433   # https://davdroid.bitfire.at/configuration/
1434
1435   # note on debugging: if radicale can't bind to the address,
1436   # in the log it just says "Starting Radicale". If you run
1437   # it in the foreground, it will give more info. Background
1438   # plus debug does not help.
1439   # sudo -u radicale radicale -D -f
1440
1441   # created password file with:
1442   # htpasswd -c /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1443   # chmod 640 /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1444   # # setup chgrp www-data in ./conflink
1445
1446   pi-nostart radicale
1447
1448   i /etc/systemd/system/radicale.service.d/override.conf <<EOF
1449 [Unit]
1450
1451 After=network.target network-online.target mailnn.service $vpnser
1452
1453 Wants=$vpnser
1454 JoinsNamespaceOf=mailnn.service
1455 StartLimitIntervalSec=0
1456
1457 [Service]
1458 PrivateNetwork=true
1459 BindPaths=$bindpaths
1460 Restart=always
1461 # time to sleep before restarting a service
1462 RestartSec=20
1463
1464 [Install]
1465 # for openvpn
1466 RequiredBy=$vpnser
1467 EOF
1468
1469
1470   # use persistent uid/gid
1471   IFS=:; read -r _ _ uid _ < <(getent passwd radicale ); unset IFS
1472   IFS=:; read -r _ _ gid _ < <(getent group radicale ); unset IFS
1473   if [[ $uid != 609 ]]; then
1474     m systemctl stop radicale ||:
1475     m usermod -u 609 radicale
1476     m groupmod -g 609 radicale
1477     m usermod -g 609 radicale
1478   fi
1479   m find /o/radicale  -xdev -exec chown -h 609 {} +
1480   m find /o/radicale -xdev -exec chgrp -h 609 {} +
1481
1482
1483   # I moved /var/lib/radicale after it's initialization.
1484   # I did a sudo -u radicale git init in the collections subfolder
1485   # after it gets created, per the git docs.
1486   m /a/exe/lnf -T /o/radicale /var/lib/radicale
1487
1488   # from https://www.williamjbowman.com/blog/2015/07/24/setting-up-webdav-caldav-and-carddav-servers/
1489
1490   # more config is for li in distro-end
1491
1492   # coment in this file says this is needed for it to run on startup
1493   sed -ri 's/^\s*#+\s*(ENABLE_RADICALE\s*=\s*yes\s*)/\1/' /etc/default/radicale
1494
1495   # comments say default is 0.0.0.0:5232
1496   m setini hosts 10.8.0.4:5232 server
1497   # https://radicale.org/2.1.html
1498   m setini type http_x_remote_user auth
1499
1500
1501   # disable power management feature, set to 240 min sync interval,
1502   # so it shouldn't be bad.
1503
1504   # davdroid from f-druid.
1505   # login with url and user name
1506   # url https://cal.iankelling.org/ian
1507   # username ian
1508   # pass, see password manager for radicale
1509   #
1510   # add account dialog:
1511   #
1512   # set account name as ian@iankelling.org, per help text below the
1513   # field.
1514   #
1515   # switch to groups are per-contact categories,
1516   # per https://davdroid.bitfire.at/configuration/radicale/
1517   #
1518   #
1519   # After setting up account, I added one address book, named
1520   # ianaddr. calender was already created, named ian. checked boxes under
1521   # both. synced.
1522   #
1523   # To restore from old phone to new phone, I wiped all data out, then copied over the newly created files. I think
1524   #
1525   # ignorable background info:
1526   #
1527   # opentasks uses the calendar file.
1528   #
1529   # The address book I created got a uuid as a name for the file. Note
1530   # the .props file says if it's a calendar or addressbook.
1531   #
1532   # When debugging, tailed /var/log/radicale/radicale.log and apache log,
1533   # both show the requests happening. Without creating the address book,
1534   # after creating a contact, a sync would delete it.
1535   #
1536   # Address books correspond to .props files in the radicale dir.
1537   #
1538   #  Some background is here,
1539   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1540   # which shows separate vcard option is from rfc 6350, the other is 2426,
1541   # radicale page says it implements the former not the latter,
1542   # which conflicts with the documentation of which to select, but whatever.
1543   # http://radicale.org/technical_choices/
1544   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1545   #
1546   # Note, url above says only cayanogenmod 13+ and omnirom can manage groups.
1547
1548   # Note, radicale had built-in git support to track changes, but they
1549   # removed it in 2.0.
1550
1551 fi
1552
1553 # * dovecot
1554
1555 # ** $MAIL_HOST|bk|je)
1556 case $HOSTNAME in
1557   $MAIL_HOST|bk|je)
1558     # based on a little google and package search, just the dovecot
1559     # packages we need instead of dovecot-common.
1560     #
1561     # dovecot-lmtpd is for exim to deliver to dovecot instead of maildir
1562     # directly.  The reason to do this is to use dovecot\'s sieve, which
1563     # can generally do more than exims filters (a few things less) and
1564     # sieve has the benefit of being supported in postfix and
1565     # proprietary/weird environments, so there is more examples on the
1566     # internet.
1567     pi-nostart dovecot-core dovecot-imapd dovecot-sieve dovecot-lmtpd dovecot-sqlite sqlite3
1568
1569     for f in /p/c{/machine_specific/$HOSTNAME,}/filesystem/etc/dovecot/users; do
1570       if [[ -e $f ]]; then
1571         m rsync -ahhi --chown=root:dovecot --chmod=0640 $f /etc/dovecot/
1572         break
1573       fi
1574     done
1575     for f in /p/c/subdir_files/sieve/*sieve /a/bin/ds/subdir_files/sieve/*sieve; do
1576       m sudo -u $u /a/exe/lnf -v -T $f $uhome/sieve/${f##*/}
1577     done
1578
1579     # https://wiki.dovecot.org/SSL/DovecotConfiguration
1580     i /etc/dovecot/dhparam <<'EOF'
1581 -----BEGIN DH PARAMETERS-----
1582 MIIBCAKCAQEAoleil6SBxGqQKk7j0y2vV3Oklv6XupZKn7PkPv485QuFeFagifeS
1583 A+Jz6Wquqk5zhGyCu63Hp4wzGs4TyQqoLjkaWL6Ra/Bw3g3ofPEzMGEsV1Qdqde4
1584 jorwiwtr2i9E6TXQp0noT/7VFeHulIkayTeW8JulINdMHs+oLylv16McGCIrxbkM
1585 8D1PuO0TP/CNDs2QbRvJ1RjY3CeGpxMhrSHVgBCUMwnA2cvz3bYjI7UMYMMDPNrE
1586 PLrwsYzXGGCdJsO2vsmmqqgLsZiapYJlUNjfiyWLt7E2H6WzkNB3VIhIPfLqFDPK
1587 xioE3sYKdjOt+p6mlg3l8+OLtODEFPHDqwIBAg==
1588 -----END DH PARAMETERS-----
1589 EOF
1590     {
1591
1592       if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
1593         cat <<'EOF'
1594 ssl_cert = </etc/exim4/fullchain.pem
1595 ssl_key = </etc/exim4/privkey.pem
1596 EOF
1597       else
1598         # We have a lets encrypt hooks that puts things here.
1599         # This is just for bk, which uses the vpn cert in exim
1600         # for sending mail, but the local hostname cert for
1601         # dovecot.
1602         cat <<'EOF'
1603 ssl_cert = </etc/exim4/exim.crt
1604 ssl_key = </etc/exim4/exim.key
1605 EOF
1606       fi
1607
1608       cat <<'EOF'
1609 # https://ssl-config.mozilla.org
1610 ssl = required
1611 # this is the same as the certbot list, in my cert cronjob, I check if that has changed upstream.
1612 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
1613 ssl_protocols = TLSv1.2
1614 ssl_prefer_server_ciphers = no
1615
1616 protocol lmtp {
1617 #per https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
1618 # default is just $mail_plugins
1619   mail_plugins = $mail_plugins sieve
1620 }
1621 EOF
1622       if dpkg --compare-versions $(dpkg-query -f='${Version}\n' --show dovecot-core) ge 1:2.3; then
1623         cat <<EOF
1624 ssl_dh = </etc/dovecot/dhparam
1625 EOF
1626       fi
1627     } >/etc/dovecot/local.conf
1628
1629     ;;&
1630
1631   # **  $MAIL_HOST)
1632   $MAIL_HOST)
1633     # If we changed 90-sieve.conf and removed the active part of the
1634     # sieve option, we wouldn\'t need this, but I\'d rather not modify a
1635     # default config if not needed. This won\'t work as a symlink in /a/c
1636     # unfortunately.
1637     m sudo -u $u /a/exe/lnf -T sieve/main.sieve $uhome/.dovecot.sieve
1638
1639     if [[ ! -e $uhome/sieve/personal.sieve ]]; then
1640       m touch $uhome/sieve/personal{,end}{,test}.sieve
1641     fi
1642
1643     rm -fv /etc/dovecot/conf.d/20-lmtp.conf # file from prev version
1644     cat >>/etc/dovecot/local.conf <<EOF
1645 # simple password file based login
1646 !include conf.d/auth-passwdfile.conf.ext
1647
1648 # ian: %u is used for alerts user vs iank
1649 mail_location = maildir:/m/%u:LAYOUT=fs:INBOX=/m/%u/INBOX
1650 mail_uid = $u
1651 mail_gid = $u
1652
1653 protocol lmtp {
1654 # For a normal setup with exim, we need something like this, which
1655 # removes the domain part
1656 #  auth_username_format = %Ln
1657 #
1658 #  or else # Exim says something like
1659 #  "LMTP error after RCPT ... 550 ... User doesn't exist someuser@somedomain"
1660 # Dovecot verbose log says something like
1661 # "auth-worker(9048): passwd(someuser@somedomain): unknown user"
1662 # reference: http://wiki.dovecot.org/LMTP/Exim
1663 #
1664 # However, I use this to direct all mail to the same inbox.
1665 # A normal way to do this, which I did at first is to have
1666 # a router in exim almost at the end, eg 950,
1667 #local_catchall:
1668 #  debug_print = "R: catchall for \$local_part@\$domain"
1669 #  driver = redirect
1670 #  domains = +local_domains
1671 #  data = $u
1672 # based on
1673 # http://blog.alteholz.eu/2015/04/exim4-and-catchall-email-address/
1674 # with superflous options removed.
1675 # However, this causes the envelope to be rewritten,
1676 # which makes filtering into mailboxes a little less robust or more complicated,
1677 # so I've done it this way instead. it also requires
1678 # modifying the local router in exim.
1679   auth_username_format = $u
1680 }
1681 EOF
1682     ;;&
1683   # **  bk|je)
1684   bk|je)
1685     chown -R mail.mail /m/md
1686
1687     f=/etc/dovecot/conf.d/10-auth.conf
1688     if [[ -e $f ]]; then
1689       mv $f $f-iank-disabled
1690     fi
1691
1692     cat >>/etc/dovecot/local.conf <<EOF
1693 !include /etc/dovecot/local.conf.ext
1694
1695 # for debugging info, uncomment these.
1696 # logs go to syslog and to /var/log/mail.log
1697 #auth_verbose=yes
1698 #mail_debug=yes
1699
1700
1701 protocol lmtp {
1702 # This downcases the localpart. default is case sensitive.
1703 # case sensitive local part will miss out on valid email when some person or system
1704 # mistakenly capitalizes things.
1705   auth_username_format = %Lu
1706 }
1707
1708 # make 147 only listen on localhost, plan to use for nextcloud.
1709 # copied from mailinabox
1710 service imap-login {
1711   inet_listener imap {
1712     address = 127.0.0.1
1713   }
1714 }
1715 # https://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_dovecot_authenticator.html
1716 service auth {
1717   unix_listener auth-client {
1718     user = Debian-exim
1719     group = Debian-exim
1720   }
1721 }
1722
1723
1724 plugin {
1725   sieve_before = /etc/dovecot/sieve-spam.sieve
1726   # from mailinabox
1727   sieve = /m/sieve/%d/%n.sieve
1728   sieve_dir = /m/sieve/%d/%n
1729 }
1730
1731
1732 # all taken from mailinabox.
1733 mail_location = maildir:/m/md/%d/%n
1734 # meh, ok.
1735 mail_privileged_group = mail
1736 # By default Dovecot allows users to log in only with UID numbers 500 and above. mail is 8
1737 first_valid_uid = 1
1738
1739 # todo: test these changes in the universal config
1740 # mailboxes taken from mailinabox but removed
1741 # settings duplicate to defaults
1742 namespace inbox {
1743   mailbox INBOX {
1744     auto = subscribe
1745   }
1746   mailbox Spam {
1747     special_use = \Junk
1748     auto = subscribe
1749   }
1750   mailbox Drafts {
1751     auto = subscribe
1752   }
1753   mailbox Sent {
1754     auto = subscribe
1755   }
1756   mailbox Trash {
1757     auto = subscribe
1758   }
1759   mailbox Archive {
1760     special_use = \Archive
1761     auto = subscribe
1762   }
1763 }
1764 auth_mechanisms = plain login
1765 EOF
1766
1767     i /etc/dovecot/sieve-spam.sieve <<'EOF'
1768 require ["regex", "fileinto", "imap4flags"];
1769
1770 if allof (header :regex "X-Spam-Status" "^Yes") {
1771   fileinto "Spam";
1772   stop;
1773 }
1774 EOF
1775
1776     i /etc/dovecot/local.conf.ext <<'EOF'
1777 passdb {
1778   driver = sql
1779   args = /etc/dovecot/dovecot-sql.conf.ext
1780 }
1781 userdb {
1782   driver = sql
1783   args = /etc/dovecot/dovecot-sql.conf.ext
1784 }
1785
1786 EOF
1787
1788     i /etc/dovecot/dovecot-sql.conf.ext <<'EOF'
1789 # from mailinabox
1790 driver = sqlite
1791 # for je and bk, populated the testignore users for the relevant domains
1792 connect = /m/rc/users.sqlite
1793 default_pass_scheme = SHA512-CRYPT
1794 password_query = SELECT email as user, password FROM users WHERE email='%u';
1795 user_query = SELECT email AS user, "mail" as uid, "mail" as gid, "/m/md/%d/%n" as home FROM users WHERE email='%u';
1796 iterate_query = SELECT email AS user FROM users;
1797 EOF
1798     m chmod 0600 /etc/dovecot/dovecot-sql.conf.ext # per Dovecot instructions
1799
1800     # db needs to be in a www-data writable directory
1801     db=/m/rc/users.sqlite
1802     if [[ ! -s $db ]]; then
1803       m mkdir -p /m/rc
1804       m sqlite3 $db <<'EOF'
1805 CREATE TABLE users (
1806 id INTEGER PRIMARY KEY AUTOINCREMENT,
1807 email TEXT NOT NULL UNIQUE,
1808 password TEXT NOT NULL,
1809 extra,
1810 privileges TEXT NOT NULL DEFAULT '');
1811 EOF
1812     fi
1813     # users.sqlite is saved into /p/c/machine_specific, so update it there!.
1814     #
1815     # example of adding a user:
1816     # hash: doveadm pw -s SHA512-CRYPT -p passhere
1817     # sqlite3 /m/rc/users.sqlite <<'EOF'
1818     #insert into users (email, password) values ('testignore@bk.b8.nz', 'hash');
1819     #EOF
1820     # update users set password = 'hash' where email = 'testignore@bk.b8.nz';
1821
1822     # this should be at the end since it requires a valid dovecot config
1823     m sievec /etc/dovecot/sieve-spam.sieve
1824     ;;&
1825   # **  bk)
1826   bk)
1827     # roundcube uses this
1828     mkdir -p /m/sieve
1829     chown mail.mail /m/sieve
1830     m pi dovecot-managesieved
1831     ;;
1832 esac
1833
1834 # * thunderbird autoconfig setup
1835
1836 bkdomains=(expertpathologyreview.com amnimal.ninja)
1837 if [[ $HOSTNAME == bk ]]; then
1838   for domain in ${bkdomains[@]}; do
1839     m /a/exe/web-conf apache2 autoconfig.$domain
1840     dir=/var/www/autoconfig.$domain/html/mail
1841     m mkdir -p $dir
1842     # taken from mailinabox
1843     i $dir/config-v1.1.xml <<EOF
1844 <?xml version="1.0" encoding="UTF-8"?>
1845 <clientConfig version="1.1">
1846     <emailProvider id="$domain">
1847       <domain>$domain</domain>
1848
1849       <displayName>$domain Mail</displayName>
1850       <displayShortName>$domain</displayShortName>
1851
1852       <incomingServer type="imap">
1853          <hostname>mail2.iankelling.org</hostname>
1854          <port>993</port>
1855          <socketType>SSL</socketType>
1856          <username>%EMAILADDRESS%</username>
1857          <authentication>password-cleartext</authentication>
1858       </incomingServer>
1859
1860       <outgoingServer type="smtp">
1861          <hostname>mail2.iankelling.org</hostname>
1862          <port>587</port>
1863          <socketType>STARTTLS</socketType>
1864          <username>%EMAILADDRESS%</username>
1865          <authentication>password-cleartext</authentication>
1866          <addThisServer>true</addThisServer>
1867          <useGlobalPreferredServer>false</useGlobalPreferredServer>
1868       </outgoingServer>
1869
1870       <documentation url="https://$domain/">
1871          <descr lang="en">$domain website.</descr>
1872       </documentation>
1873     </emailProvider>
1874
1875     <webMail>
1876       <loginPage url="https://$domain/roundcube" />
1877       <loginPageInfo url="https://$domain/roundcube" >
1878         <username>%EMAILADDRESS%</username>
1879         <usernameField id="rcmloginuser" name="_user" />
1880         <passwordField id="rcmloginpwd" name="_pass" />
1881         <loginButton id="rcmloginsubmit" />
1882       </loginPageInfo>
1883     </webMail>
1884     <clientConfigUpdate url="https://autoconfig.$domain/mail/config-v1.1.xml" />
1885 </clientConfig>
1886 EOF
1887   done
1888 fi
1889
1890 # * roundcube setup
1891
1892 if [[ $HOSTNAME == bk ]]; then
1893
1894   # zip according to /installer
1895   # which requires adding a line to /usr/local/lib/roundcubemail/config/config.inc.php
1896   # $config['enable_installer'] = true;
1897   pi roundcube roundcube-sqlite3 php-zip apache2 php-fpm
1898
1899   ### begin composer install
1900   # https://getcomposer.org/doc/faqs/how-to-install-composer-programmatically.md
1901   # cd $(mktemp -d)
1902   # sum="$(wget -q -O - https://composer.github.io/installer.sig)"
1903   # m php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
1904   # if [[ $sum != $(php -r "echo hash_file('sha384', 'composer-setup.php');") ]]; then
1905   #   echo 'ERROR: Invalid composer installer checksum' >&2
1906   #   rm -fv composer-setup.php
1907   #   exit 1
1908   # fi
1909   # m php composer-setup.php --quiet
1910   # rm -fv composer-setup.php
1911   # m mv composer.phar /usr/local/bin
1912
1913   # the above method gets composer2, carddav plugin at least doesnt work with that
1914   # yet, it was just released 10-24-2020.
1915   m cd /usr/local/bin
1916   m wget -nv -N https://getcomposer.org/composer-1.phar
1917   chmod +x composer-1.phar
1918   ### end composer install
1919
1920   rcdirs=(/usr/local/lib/rcexpertpath /usr/local/lib/rcninja)
1921   ncdirs=(/var/www/ncninja)
1922   ncdirs=(/var/www/ncexpertpath /var/www/ncninja)
1923   # point debian cronjob to our local install, preventing daily cron error
1924
1925   # debian's cronjob will fail, remove both paths it uses just to be sure
1926   rm -fv /usr/share/roundcube/bin/cleandb.sh /etc/cron.d/roundcube-core
1927
1928   #### begin dl roundcube
1929   # note, im r2e subbed to https://github.com/roundcube/roundcubemail/releases.atom
1930   v=1.4.13; f=roundcubemail-$v-complete.tar.gz
1931   cd /root
1932   if [[ -e $f ]]; then
1933     timestamp=$(stat -c %Y $f)
1934   else
1935     timestamp=0
1936   fi
1937   m wget -nv -N https://github.com/roundcube/roundcubemail/releases/download/$v/$f
1938   new_timestamp=$(stat -c %Y $f)
1939   for rcdir in ${rcdirs[@]}; do
1940     if [[ $timestamp != "$new_timestamp" ||  ! -e "$rcdir/config/secret" ]]; then
1941       m tar -C /usr/local/lib --no-same-owner -zxf $f
1942       m rm -rf $rcdir
1943       m mv /usr/local/lib/roundcubemail-$v $rcdir
1944     fi
1945   done
1946   #### end dl roundcube
1947
1948   for ((i=0; i < ${#bkdomains[@]}; i++)); do
1949     domain=${bkdomains[i]}
1950     rcdir=${rcdirs[i]}
1951     rcbase=${rcdir##*/}
1952     ncdir=${ncdirs[i]}
1953
1954     # copied from debians cronjob
1955     i /etc/cron.d/$rcbase <<EOF
1956 #  Roundcube database cleaning: finally removes all records that are
1957 #  marked as deleted.
1958 0   5  *   *   *   www-data $rcdir/bin/cleandb.sh >/dev/null
1959 EOF
1960
1961     m /a/exe/web-conf - apache2 $domain <<EOF
1962 Alias /roundcube $rcdir
1963 ### begin roundcube settings
1964 # taken from /etc/apache2/conf-available/roundcube.conf version 1.4.8+dfsg.1-1~bpo10+1
1965 <Directory $rcdir/>
1966   Options +FollowSymLinks
1967   # This is needed to parse $rcdir/.htaccess.
1968   AllowOverride All
1969   Require all granted
1970 </Directory>
1971 # Protecting basic directories:
1972 <Directory $rcdir/config>
1973   Options -FollowSymLinks
1974   AllowOverride None
1975 </Directory>
1976 ### end roundcube settings
1977
1978
1979 ### begin nextcloud settings
1980 Alias /nextcloud "$ncdir/"
1981 <Directory $ncdir/>
1982   Require all granted
1983   AllowOverride All
1984   Options FollowSymLinks MultiViews
1985
1986   <IfModule mod_dav.c>
1987     Dav off
1988   </IfModule>
1989
1990 </Directory>
1991
1992 # based on install checker, links to
1993 # https://docs.nextcloud.com/server/19/admin_manual/issues/general_troubleshooting.html#service-discovery
1994 # their example was a bit wrong, I figured it out by adding
1995 # LogLevel warn rewrite:trace5
1996 # then watching the apache logs
1997
1998 RewriteEngine on
1999 RewriteRule ^/\.well-known/host-meta /nextcloud/public.php?service=host-meta [QSA,L]
2000 RewriteRule ^/\.well-known/host-meta\.json /nextcloud/public.php?service=host-meta-json [QSA,L]
2001 RewriteRule ^/\.well-known/webfinger /nextcloud/public.php?service=webfinger [QSA,L]
2002 RewriteRule ^/\.well-known/carddav /nextcloud/remote.php/dav/ [R=301,L]
2003 RewriteRule ^/\.well-known/caldav /nextcloud/remote.php/dav/ [R=301,L]
2004 ### end nextcloud settings
2005 EOF
2006     if [[ ! -e $rcdir/config/secret ]]; then
2007       base64 </dev/urandom | head -c24 >$rcdir/config/secret || [[ $? == 141 || ${PIPESTATUS[0]} == 32 ]]
2008     fi
2009     secret=$(cat $rcdir/config/secret)
2010
2011     rclogdir=/var/log/$rcbase
2012     rctmpdir=/var/tmp/$rcbase
2013     rcdb=/m/rc/$rcbase.sqlite
2014     # config from mailinabox
2015     i $rcdir/config/config.inc.php <<EOF
2016 <?php
2017 \$config = array();
2018 # debian creates this for us
2019 \$config['log_dir'] = '$rclogdir/';
2020 # debian also creates a temp dir, but it is under its install dir,
2021 # seems better to have our own.
2022 \$config['temp_dir'] = '$rctmpdir/';
2023 \$config['db_dsnw'] = 'sqlite:///$rcdb?mode=0640';
2024 \$config['default_host'] = 'ssl://localhost';
2025 \$config['default_port'] = 993;
2026 \$config['imap_conn_options'] = array(
2027   'ssl'         => array(
2028      'verify_peer'  => false,
2029      'verify_peer_name'  => false,
2030    ),
2031  );
2032 \$config['imap_timeout'] = 15;
2033 \$config['smtp_server'] = 'tls://127.0.0.1';
2034 \$config['smtp_conn_options'] = array(
2035   'ssl'         => array(
2036      'verify_peer'  => false,
2037      'verify_peer_name'  => false,
2038    ),
2039  );
2040 \$config['product_name'] = 'webmail';
2041 \$config['des_key'] = '$secret';
2042 \$config['plugins'] = array('archive', 'zipdownload', 'password', 'managesieve', 'jqueryui', 'carddav', 'html5_notifier');
2043 \$config['skin'] = 'elastic';
2044 \$config['login_autocomplete'] = 2;
2045 \$config['password_charset'] = 'UTF-8';
2046 \$config['junk_mbox'] = 'Spam';
2047 # disable builtin addressbook
2048 \$config['address_book_type'] = '';
2049 ?>
2050 EOF
2051
2052     m mkdir -p $rclogdir
2053     m chmod 750 $rclogdir
2054     m chown www-data:adm $rclogdir
2055     # note: subscribed to updates:
2056     # r2e add rcmcarddav https://github.com/blind-coder/rcmcarddav/commits/master.atom ian@iankelling.org
2057     # r2e add roundcube https://github.com/roundcube/roundcubemail/releases.atom ian@iankelling.org
2058     m mkdir -p $rctmpdir /m/rc
2059     m chown -R www-data.www-data $rctmpdir /m/rc
2060     m chmod 750 $rctmpdir
2061     # Ensure the log file monitored by fail2ban exists, or else fail2ban can't start.
2062     # todo: check for other mailinabox things
2063     m sudo -u www-data touch $rclogdir/errors.log
2064
2065     #### begin carddav install
2066     # This is the official roundcube carddav repo.
2067     # Install doc suggests downloading with composer, but that
2068     # didnt work, it said some ldap package for roundcube was missing,
2069     # but I dont want to download some extra ldap thing.
2070     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/INSTALL.md
2071     verf=$rcdir/plugins/carddav/myversion
2072     upgrade=false
2073     install=false
2074     v=4.0.0
2075     if [[ -e $verf ]]; then
2076       if [[ $(cat $verf) != "$v" ]]; then
2077         install=true
2078         upgrade=true
2079       fi
2080     else
2081       install=true
2082     fi
2083     if $install; then
2084       m rm -rf $rcdir/plugins/carddav
2085       tmpd=$(mktemp -d)
2086       m wget -nv -O $tmpd/t.tgz https://github.com/blind-coder/rcmcarddav/releases/download/v$v/carddav-v$v.tgz
2087       cd $rcdir/plugins
2088       tar xzf $tmpd/t.tgz
2089       rm -rf $tmpd
2090       m chown -R www-data:www-data $rcdir/plugins/carddav
2091       m cd $rcdir/plugins/carddav
2092       if $upgrade; then
2093         m sudo -u www-data composer-1.phar update --no-dev
2094       else
2095         m sudo -u www-data composer-1.phar install --no-dev
2096       fi
2097       m chown -R root:root $rcdir/plugins/carddav
2098       echo $v >$verf
2099     fi
2100
2101     # So, strangely, this worked in initial testing, but then
2102     # on first run it wouldn't show the existing contacts until
2103     # I went into the carddav settings and did "force immediate sync",
2104     # which seemed to fix things. Note, some of these settings
2105     # get initalized per/addressbook in the db, then need changing
2106     # there or through the settings menu.
2107
2108     # About categories, see https://www.davx5.com/tested-with/nextcloud
2109     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/GROUPS.md
2110     i $rcdir/plugins/carddav/config.inc.php <<EOF;
2111 <?php
2112 \$prefs['_GLOBAL']['hide_preferences'] = false;
2113 \$prefs['davserver'] = array(
2114 # name in the UI is kind of dumb. This is just something short that seems to fit ok.
2115   'name'         =>  'Main',
2116   'username'     =>  '%u', // login username
2117   'password'     =>  '%p', // login password
2118   'url'          =>  'https://$domain/nextcloud/remote.php/dav/addressbooks/users/%u/contacts',
2119   'active'       =>  true,
2120   'readonly'     =>  false,
2121   'refresh_time' => '00:10:00',
2122   'fixed'        =>  array('username','password'),
2123   'use_categories' => false,
2124   'hide'        =>  false,
2125 );
2126 ?>
2127 EOF
2128     #### end carddav install
2129
2130     cd $rcdir/plugins
2131     if [[ ! -d html5_notifier ]]; then
2132       m git clone https://github.com/stremlau/html5_notifier
2133     fi
2134     cd $rcdir/plugins/html5_notifier
2135     m git pull --rebase
2136
2137     # todo: try out roundcube plugins: thunderbird labels
2138
2139     # Password changing plugin settings
2140     cat $rcdir/plugins/password/config.inc.php.dist - >$rcdir/plugins/password/config.inc.php <<'EOF'
2141 # following are from mailinabox
2142 $config['password_minimum_length'] = 8;
2143 $config['password_db_dsn'] = 'sqlite:////m/rc/users.sqlite';
2144 $config['password_query'] = 'UPDATE users SET password=%D WHERE email=%u';
2145 $config['password_dovecotpw'] = '/usr/bin/doveadm pw';
2146 $config['password_dovecotpw_method'] = 'SHA512-CRYPT';
2147 $config['password_dovecotpw_with_method'] = true;
2148 EOF
2149     # so PHP can use doveadm, for the password changing plugin
2150     m usermod -a -G dovecot www-data
2151     m usermod -a -G mail $u
2152
2153     # so php can update passwords
2154     m chown www-data:dovecot /m/rc/users.sqlite
2155     m chmod 664 /m/rc/users.sqlite
2156
2157     # Run Roundcube database migration script (database is created if it does not exist)
2158     m $rcdir/bin/updatedb.sh --dir $rcdir/SQL --package roundcube
2159     m chown www-data:www-data $rcdb
2160     m chmod 664 $rcdb
2161   done # end loop over domains and rcdirs
2162
2163   ### begin php setup for rc ###
2164   # Enable PHP modules.
2165   m phpenmod -v php mcrypt imap
2166   # dpkg says this is required
2167   m a2enmod proxy_fcgi setenvif
2168   fpm=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* (php[^ ]*-fpm)( .*|$)/\1/p') # eg: php7.4-fpm
2169   phpver=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* php([^ ]*)-fpm( .*|$)/\1/p')
2170   m a2enconf $fpm
2171   # 3 useless guides on php fpm fcgi debian 10 later, i figure out from reading
2172   # /etc/apache2/conf-enabled/php7.3-fpm.conf
2173   m a2dismod php$phpver
2174   # according to /install, we should set date.timezone,
2175   # but that is dumb, the system already has the right zone in
2176   # $rclogdir/errors.log
2177   # todo: consider other settings in
2178   # /a/opt/mailinabox/setup/nextcloud.sh
2179   i /etc/php/$phpver/cli/conf.d/30-local.ini <<'EOF'
2180 apc.enable_cli = 1
2181 EOF
2182
2183   i /etc/php/$phpver/fpm/conf.d/30-local.ini <<'EOF'
2184 date.timezone = "America/New_York"
2185 # for nextcloud
2186 upload_max_filesize = 2000M
2187 post_max_size = 2000M
2188 # install checker, nextcloud/settings/admin/overview
2189 memory_limit = 512M
2190 EOF
2191   m systemctl restart $fpm
2192   # dunno if reload/restart is needed
2193   m systemctl reload apache2
2194   # note bk backups are defined in crontab outside this file
2195   ### end php setup for rc ###
2196
2197 fi # end roundcube setup
2198
2199 # * nextcloud setup
2200
2201 if [[ $HOSTNAME == bk ]]; then
2202   # from install checker, nextcloud/settings/admin/overview and
2203   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2204   # curl from the web installer requirement, but i switched to cli
2205   # it recommends php-file info, but that is part of php7.3-common, already got installed
2206   # with roundcube.
2207   m pi php-curl php-bz2 php-gmp php-bcmath php-imagick php-apcu
2208
2209   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2210   cat >/etc/php/$phpver/fpm/pool.d/localwww.conf <<'EOF'
2211 [www]
2212 clear_env = no
2213 EOF
2214
2215   for ((i=0; i < ${#bkdomains[@]}; i++)); do
2216     domain=${bkdomains[i]}
2217     ncdir=${ncdirs[i]}
2218     ncbase=${ncdir##*/}
2219     m cd /var/www
2220     if [[ ! -e $ncdir/index.php ]]; then
2221       # if we wanted to only install a specific version, use something like
2222       # file=latest-22.zip
2223       file=latest.zip
2224       m wget -nv -N https://download.nextcloud.com/server/releases/$file
2225       m rm -rf nextcloud
2226       m unzip -q $file
2227       m rm -f $file
2228       m chown -R www-data.www-data nextcloud
2229       m mv nextcloud $ncdir
2230       m cd $ncdir
2231       m sudo -u www-data php occ  maintenance:install --database sqlite --admin-user iank --admin-pass $nextcloud_admin_pass
2232     fi
2233     # note, strange this happend where updater did not increment the version var,
2234     # mine was stuck on 20. I manually updated it.
2235     m cd $ncdir/config
2236     if [[ ! -e config.php-orig ]]; then
2237       m cp -a config.php config.php-orig
2238     fi
2239     cat config.php-orig - >tmp.php <<EOF
2240 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/email_configuration.html
2241 \$CONFIG["mail_smtpmode"] = "sendmail";
2242 \$CONFIG["mail_smtphost"] = "127.0.0.1";
2243 \$CONFIG["mail_smtpport"] = 25;
2244 \$CONFIG["mail_smtptimeout"] = 10;
2245 \$CONFIG["mail_smtpsecure"] = "";
2246 \$CONFIG["mail_smtpauth"] = false;
2247 \$CONFIG["mail_smtpauthtype"] = "LOGIN";
2248 \$CONFIG["mail_smtpname"] = "";
2249 \$CONFIG["mail_smtppassword"] = "";
2250 \$CONFIG["mail_domain"] = "$domain";
2251
2252 # https://github.com/nextcloud/user_external#readme
2253 # plus mailinabox example
2254 #\$CONFIG['user_backends'] = array(array('class' => 'OC_User_IMAP','arguments' => array('127.0.0.1', 143, null),),);
2255
2256
2257 # based on installer check
2258 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/caching_configuration.html
2259 \$CONFIG['memcache.local'] = '\OC\Memcache\APCu';
2260
2261 \$CONFIG['overwrite.cli.url'] = 'https://$domain/nextcloud';
2262 \$CONFIG['htaccess.RewriteBase'] = '/nextcloud';
2263 \$CONFIG['trusted_domains'] = array (
2264         0 => '$domain',
2265     );
2266 #\$CONFIG[''] = '';
2267 fwrite(STDOUT, "<?php\n\\\$CONFIG = ");
2268 var_export(\$CONFIG);
2269 fwrite(STDOUT, ";\n");
2270 EOF
2271     m php tmp.php >config.php
2272     m rm -f tmp.php
2273     m sudo -u www-data php $ncdir/occ maintenance:update:htaccess
2274     list=$(sudo -u www-data php $ncdir/occ --output=json_pretty app:list)
2275     # user_external not compaible with nc 23
2276     for app in contacts calendar; do
2277       if [[ $(printf "%s\n" "$list"| jq ".enabled.$app") == null ]]; then
2278         m sudo -u www-data php $ncdir/occ app:install $app
2279       fi
2280     done
2281     i /etc/systemd/system/$ncbase.service <<EOF
2282 [Unit]
2283 Description=ncup $ncbase
2284 After=multi-user.target
2285
2286 [Service]
2287 Type=oneshot
2288 ExecStart=/usr/local/bin/ncup $ncbase
2289 User=www-data
2290 IOSchedulingClass=idle
2291 CPUSchedulingPolicy=idle
2292 EOF
2293     i /etc/systemd/system/$ncbase.timer <<EOF
2294 [Unit]
2295 Description=ncup $ncbase timer
2296
2297 [Timer]
2298 OnCalendar=Daily
2299
2300 [Install]
2301 WantedBy=timers.target
2302 EOF
2303     systemctl enable --now $ncbase.timer
2304     i /usr/local/bin/ncup <<'EOFOUTER'
2305 #!/bin/bash
2306 if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
2307 shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
2308 set -eE -o pipefail
2309 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR
2310
2311 ncbase=$1
2312 if ! php /var/www/$ncbase/updater/updater.phar -n; then
2313   echo failed nextcloud update for $ncbase >&2
2314   /sbin/exim -t <<EOF
2315 To: alerts@iankelling.org
2316 From: root@$(hostname -f)
2317 Subject: failed nextcloud update for $ncbase
2318
2319 For logs, run: jr -u $ncbase
2320 EOF
2321 fi
2322 EOFOUTER
2323     chmod +x /usr/local/bin/ncup
2324
2325     mkdir -p /var/www/cron-errors
2326     chown www-data.www-data /var/www/cron-errors
2327     i /etc/cron.d/$ncbase <<EOF
2328 PATH=/usr/sbin:/sbin:/usr/bin:/bin:/usr/local/bin
2329 SHELL=/bin/bash
2330 # https://docs.nextcloud.com/server/20/admin_manual/configuration_server/background_jobs_configuration.html
2331 */5  *  *  *  * www-data php -f $ncdir/cron.php --define apc.enable_cli=1 |& log-once nccron
2332 EOF
2333
2334   done
2335 fi
2336
2337
2338 # * exim host conditional config
2339
2340 # ** exim certs
2341
2342 all_dirs=(/p/c/filesystem)
2343 for x in /p/c/machine_specific/*.hosts /a/bin/ds/machine_specific/*.hosts; do
2344   if grep -qxF $HOSTNAME $x; then all_dirs+=( ${x%.hosts} ); fi
2345 done
2346 files=()
2347 for d in ${all_dirs[@]}; do
2348   f=$d/etc/exim4/passwd
2349   if [[ -e $f  ]]; then
2350     files+=($f)
2351   fi
2352   tmp=($d/etc/exim4/*.pem)
2353   if (( ${#tmp[@]} )); then
2354     files+=(${tmp[@]})
2355   fi
2356 done
2357
2358 if (( ${#files[@]} )); then
2359   sudo rsync -ahhi --chown=root:Debian-exim --chmod=0640 ${files[@]} /etc/exim4/
2360 fi
2361
2362
2363 # ** exim: auth
2364
2365 case $HOSTNAME in
2366   bk|je)
2367     # avoid accepting mail for invalid users
2368     # https://wiki.dovecot.org/LMTP/Exim
2369     cat >>/etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2370 deny
2371   message = invalid recipient
2372   domains = +local_domains
2373   !verify = recipient/callout=no_cache
2374 EOF
2375     i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2376 dovecot_plain:
2377   driver = dovecot
2378   public_name = PLAIN
2379   server_socket = /var/run/dovecot/auth-client
2380   server_set_id = $auth1
2381 EOF
2382     ;;
2383 esac
2384 if $bhost_t; then
2385   i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2386 # from 30_exim4-config_examples
2387 plain_server:
2388 driver = plaintext
2389 public_name = PLAIN
2390 server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
2391 server_set_id = $auth2
2392 server_prompts = :
2393 .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
2394 server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
2395 .endif
2396 EOF
2397 fi
2398
2399 # ** exim: main daemon use non-default config file
2400 case $HOSTNAME in
2401   bk|$MAIL_HOST)
2402     # to see the default comments in /etc/default/exim4:
2403     # s update-exim4defaults --force --init
2404     # which will overwrite any existing file
2405     i /etc/default/exim4 <<'EOF'
2406 QUEUERUNNER='combined'
2407 QUEUEINTERVAL='30m'
2408 COMMONOPTIONS='-C /etc/exim4/my.conf'
2409 UPEX4OPTS='-o /etc/exim4/my.conf'
2410 # i use epanic-clean for alerting if there are bad paniclog entries
2411 E4BCD_WATCH_PANICLOG='no'
2412 EOF
2413     chown Debian-exim:Debian-exim /usr/sbin/exim4
2414     # needs guid set in order to become Debian-exim
2415     chmod g+s,u+s /usr/sbin/exim4
2416     i /etc/exim4/trusted_configs <<'EOF'
2417 /etc/exim4/my.conf
2418 EOF
2419     ;;
2420   *)
2421     # default file
2422     i /etc/default/exim4 <<'EOF'
2423 QUEUERUNNER='combined'
2424 QUEUEINTERVAL='30m'
2425 EOF
2426     ;;
2427 esac
2428
2429 # ** exim non-root
2430
2431 case $HOSTNAME in
2432   bk|je|li)
2433     # no reason to expect it to ever be there.
2434     rm -fv /etc/systemd/system/exim4.service.d/nonroot.conf
2435     ;;
2436   *)
2437     dirs=()
2438     for d in /a /d /m /media /mnt /nocow /o /p /q; do
2439       if [[ -d $d ]]; then
2440         dirs+=($d)
2441       fi
2442     done
2443     i /etc/systemd/system/exim4.service.d/nonroot.conf <<EOF
2444 [Service]
2445 # see 56.2 Root privilege in exim spec
2446 AmbientCapabilities=CAP_NET_BIND_SERVICE
2447 # https://www.redhat.com/sysadmin/mastering-systemd
2448 # things that seem good and reasonabl.e
2449 PrivateTmp=yes
2450 ProtectHome=yes
2451 # note, in t10 systemd, if one of these is an sshfs mountpoint,
2452 # this whole setting doesnt work. tried it with a newer systemd 250 though
2453 # an nspawn, and it worked there.
2454 InaccessiblePaths=${dirs[@]}
2455 NoNewPrivileges=yes
2456 ProtectSystem=yes
2457
2458 # when we get newer systemd
2459 #ProtectDevices=yes
2460 EOF
2461     i /etc/exim4/conf.d/main/000_local-noroot <<'EOF'
2462 # see 56.2 Root privilege in exim spec
2463 deliver_drop_privilege = true
2464 EOF
2465     files=(
2466       300_exim4-config_real_local
2467       600_exim4-config_userforward
2468       700_exim4-config_procmail
2469       800_exim4-config_maildrop
2470       mmm_mail4root
2471     )
2472     for f in ${files[@]}; do
2473       echo "# iank: removed due to running nonroot"|i /etc/exim4/conf.d/router/$f
2474     done
2475     ;;
2476 esac
2477
2478 case $HOSTNAME in
2479
2480   # ** $MAIL_HOST|bk|je)
2481   $MAIL_HOST|bk|je)
2482
2483     echo|i /etc/exim4/conf.d/router/870_backup_local
2484
2485     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2486 # note: some things we don't set that are here by default because they are unused.
2487 dc_local_interfaces=''
2488 dc_eximconfig_configtype='internet'
2489 dc_localdelivery='dovecot_lmtp'
2490 EOF
2491     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2492 # recommended if dns is expected to work
2493 CHECK_RCPT_VERIFY_SENDER = true
2494 # default config comment says: If you enable this, you might reject legitimate mail,
2495 # but eggs has had this a long time, so that seems unlikely.
2496 CHECK_RCPT_SPF = true
2497 CHECK_RCPT_REVERSE_DNS = true
2498 CHECK_MAIL_HELO_ISSUED = true
2499
2500 # enable 587 in addition to the default 25, so that
2501 # i can send mail where port 25 is firewalled by isp
2502 daemon_smtp_ports = 25 : 587
2503 # default of 25, can get stuck when catching up on mail
2504 smtp_accept_max = 400
2505 smtp_accept_reserve = 100
2506 smtp_reserve_hosts = +iank_trusted
2507
2508 # options exim has to avoid having to alter the default config files
2509 CHECK_RCPT_LOCAL_ACL_FILE = /etc/exim4/conf.d/rcpt_local_acl
2510 CHECK_DATA_LOCAL_ACL_FILE = /etc/exim4/conf.d/data_local_acl
2511 LOCAL_DENY_EXCEPTIONS_LOCAL_ACL_FILE = /etc/exim4/conf.d/local_deny_exceptions_acl
2512 # testing dmarc
2513 #dmarc_tld_file = /etc/public_suffix_list.dat
2514 EOF
2515     ;;&
2516
2517   # ** $MAIL_HOST|bk)
2518   $MAIL_HOST|bk)
2519
2520     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2521 # je.b8.nz will run out of memory with freshclam
2522 av_scanner = clamd:/var/run/clamav/clamd.ctl
2523 EOF
2524
2525     cat >> /etc/exim4/conf.d/data_local_acl <<'EOF'
2526 deny
2527   malware = */defer_ok
2528   !condition = ${if match {$malware_name}{\N^Heuristic\N}}
2529   message = This message was detected as possible malware ($malware_name).
2530 EOF
2531
2532     cat >/etc/exim4/conf.d/main/000_local-nn <<EOF
2533 # MAIN_HARDCODE_PRIMARY_HOSTNAME might mess up the
2534 # smarthost config type, not sure.
2535 # failing message on mail-tester.com:
2536 # We check if there is a server (A Record) behind your hostname kd.
2537 # You may want to publish a DNS record (A type) for the hostname kd or use a different hostname in your mail software
2538 # https://serverfault.com/questions/46545/how-do-i-change-exim4s-primary-hostname-on-a-debian-box
2539 # and this one seemed appropriate from grepping config.
2540 # I originally set this to li.iankelling.org, but then ended up with errors when li tried to send
2541 # mail to kd, so this should basically be a name that no host has as their
2542 # canonical hostname since the actual host sits behind a nat and changes.
2543 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail.iankelling.org
2544 # I used this to avoid sender verification, didnt work but it still
2545 # makes sense based on the spec.
2546 hosts_treat_as_local = defaultnn.b8.nz
2547
2548 # Outside nn, we get the default cert location from a debian macro,
2549 # and the cert file is put in place by a certbot hook.
2550 MAIN_TLS_CERTIFICATE = /etc/exim4/fullchain.pem
2551 MAIN_TLS_PRIVATEKEY = /etc/exim4/privkey.pem
2552 EOF
2553
2554     i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost <<'EOF'
2555 gnusmarthost:
2556   debug_print = "R: smarthost for $local_part@$domain"
2557   driver = manualroute
2558   domains = ! +local_domains
2559 # send most mail through eggs, helps fsfs sender reputation.
2560 # uncomment and optionally move to 188 file to send through my own servers again
2561   senders = *@gnu.org
2562   transport = smarthost_dkim
2563   route_list = * fencepost.gnu.org::587 byname
2564   host_find_failed = ignore
2565   same_domain_copy_routing = yes
2566   no_more
2567 EOF
2568
2569     /a/exe/cedit defaultnn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2570 10.173.8.1 defaultnn.b8.nz
2571 EOF
2572     ;;&
2573   # ** $MAIL_HOST)
2574   $MAIL_HOST)
2575
2576     i /etc/exim4/conf.d/router/195_dnslookup_vpn <<'EOF'
2577 # copied from /etc/exim4/conf.d/router/200_exim4-config_primary, but
2578 # use vpn transport. lower priority so it overrides the default route.
2579 # Use this in case our vpn fails, we dont send anything without it.
2580 .ifdef DCconfig_internet
2581 dnslookup_vpn:
2582   debug_print = "R: dnslookup for $local_part@$domain"
2583   driver = dnslookup
2584   domains = ! +local_domains
2585   transport = remote_smtp_vpn
2586   same_domain_copy_routing = yes
2587   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
2588   no_more
2589 .endif
2590 EOF
2591
2592
2593     # note on backups: I used to do an automatic sshfs and restricted
2594     # permissions to a specific directory on the remote server, /bu/mnt,
2595     # which required using a dedicated user, but realized smtp will be
2596     # more reliable and less fuss. If I ever need that again, see the
2597     # history of this file, and bum in brc2.
2598
2599     i /etc/exim4/conf.d/router/890_backup_copy <<EOF
2600 ### router/900_exim4-config_local_user
2601 #################################
2602
2603 # todo, it would be nice to save sent email too,
2604 # but its not so important, they still exist in my head
2605
2606 backup_redir:
2607 driver = redirect
2608 domains = +local_domains
2609 # b is just an arbirary short string
2610 data = b@eximbackup.b8.nz
2611 # note, to test this, i could temporarily allow testignore.
2612 # alerts avoids potential mail loop. root is already
2613 # redirected earlier, so that is just being overly cautious.
2614 local_parts = ! root : ! testignore : ! alerts
2615 unseen = true
2616
2617 backup_copy:
2618 driver = manualroute
2619 domains = eximbackup.b8.nz
2620 transport = backup_remote
2621 ignore_target_hosts = ${HOSTNAME}wg.b8.nz
2622 # note changes here also require change in passwd.client
2623 route_list = * eximbackup.b8.nz
2624 same_domain_copy_routing = yes
2625 errors_to = alerts@iankelling.org
2626 no_more
2627 EOF
2628
2629
2630     i /etc/exim4/conf.d/transport/30_backup_remote <<'EOF'
2631 backup_remote:
2632   driver = smtp
2633   multi_domain
2634 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
2635   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
2636 .endif
2637   hosts_require_auth = *
2638   hosts_try_auth = *
2639   envelope_to_add
2640   # manual return path because we want it to be the envelope sender
2641   # we got not the one we are using in this smtp transport
2642   headers_add = "Return-path: $sender_address"
2643 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2644   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2645 .endif
2646 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2647   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2648 .endif
2649 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2650   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2651 .endif
2652 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
2653   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
2654 .endif
2655 .ifdef REMOTE_SMTP_HEADERS_REWRITE
2656   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
2657 .endif
2658 .ifdef REMOTE_SMTP_HELO_DATA
2659   helo_data=REMOTE_SMTP_HELO_DATA
2660 .endif
2661 .ifdef TLS_DH_MIN_BITS
2662 tls_dh_min_bits = TLS_DH_MIN_BITS
2663 .endif
2664 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2665 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2666 .endif
2667 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2668 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2669 .endif
2670 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2671   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2672 .endif
2673 EOF
2674
2675
2676     # this avoids some error. i cant remember what. todo:
2677     # test it out and document why/if its needed.
2678     #     i /etc/exim4/host_local_deny_exceptions <<'EOF'
2679     # mail.fsf.org
2680     # *.posteo.de
2681     # EOF
2682
2683     # cron email from smarthost hosts will automatically be to
2684     # USER@FQDN. I redirect that to alerts@, on the smarthosts, but in
2685     # case that doesn't work, we still want to accept that mail, but not
2686     # from any host except the smarthosts. local_hostnames and this rule
2687     # is for that purpose.
2688     i /etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2689 deny
2690   !authenticated = *
2691   domains = +local_hostnames
2692   message = no relay
2693 EOF
2694     echo|i /etc/exim4/conf.d/router/880_universal_forward
2695
2696
2697     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2698 MAILDIR_HOME_MAILDIR_LOCATION = /m/md/Sent
2699 EOF
2700
2701     # for iank@fsf.org, i have mail.fsf.org forward it to fsf@iankelling.org.
2702     # and also have mail.iankelling.org whitelisted as a relay domain.
2703     # I could avoid that if I changed this to submit to 587 with a
2704     # password like a standard mua.
2705     i /etc/exim4/conf.d/router/188_exim4-config_smarthost <<'EOF'
2706 # ian: save a copy of sent mail. i thought of other ways to
2707 # do this, for example, to only save sent mail that is not sent
2708 # from my mail client which saves a copy by default, but in the
2709 # end, it seems simplest to turn that off. We want to save
2710 # external mail sent by smarthosts.
2711 sentarchive:
2712   driver = redirect
2713   domains = ! +local_domains
2714   condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
2715   data    = vojdedIdNejyebni@b8.nz
2716   unseen
2717
2718 # ian: copied from /etc/exim4/conf.d/router/200_exim4-config_primary, and added senders = and
2719 # replaced DCsmarthost with hostname
2720 fsfsmarthost:
2721   debug_print = "R: smarthost for $local_part@$domain"
2722   driver = manualroute
2723   domains = ! +local_domains
2724   senders = *@fsf.org
2725   transport = remote_smtp_smarthost
2726   route_list = * mail.fsf.org::587 byname
2727   host_find_failed = ignore
2728   same_domain_copy_routing = yes
2729   no_more
2730
2731 posteosmarthost:
2732   debug_print = "R: smarthost for $local_part@$domain"
2733   driver = manualroute
2734   domains = ! +local_domains
2735   senders = *@posteo.net
2736   transport = remote_smtp_smarthost
2737   route_list = * posteo.de::587 byname
2738   host_find_failed = ignore
2739   same_domain_copy_routing = yes
2740   no_more
2741 EOF
2742
2743     # Greping /etc/exim4, unqualified mails this would end up as
2744     # a return path, so it should go somewhere we will see.
2745     # The debconf output about mailname is as follows:
2746     # The 'mail name' is the domain name used to 'qualify' mail addresses without a domain
2747     # name.
2748     # This name will also be used by other programs. It should be the single, fully
2749     # qualified domain name (FQDN).
2750     # Thus, if a mail address on the local host is foo@example.org, the correct value for
2751     # this option would be example.org.
2752     # This name won\'t appear on From: lines of outgoing messages if rewriting is enabled.
2753     echo iankelling.org > /etc/mailname
2754
2755
2756     # mail.iankelling.org so local imap clients can connect with tls and
2757     # when they happen to not be local.
2758     # todo: this should be 10.8.0.4
2759
2760     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2761 # note: i put nn.b8.nz into bind for good measure
2762 10.173.8.2 nn.b8.nz mx.iankelling.org
2763 EOF
2764
2765     # note: systemd-resolved will consult /etc/hosts, dnsmasq wont. this assumes
2766     # weve configured this file in dnsmasq if we are using it.
2767     /a/exe/cedit mail /etc/dnsmasq-servers.conf <<'EOF' || [[ $? == 1 ]]
2768 server=/mx.iankelling.org/127.0.1.1
2769 EOF
2770     # I used to use debconf-set-selections + dpkg-reconfigure,
2771     # which then updates this file
2772     # but the process is slower than updating it directly and then I want to set other things in
2773     # update-exim4.conf.conf, so there's no point.
2774     # The file is documented in man update-exim4.conf,
2775     # except the man page is not perfect, read the bash script to be sure about things.
2776
2777     # The debconf questions output is additional documentation that is not
2778     # easily accessible, but super long, along with the initial default comment in this
2779     # file, so I've saved that into ./mail-notes.conf.
2780     #
2781     # # TODO: remove mx.iankelling.org once systems get updated mail-setup from jan 2022
2782     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2783 # man page: is used to build the local_domains list, together with "localhost"
2784 # this is duplicated in a later router.
2785 dc_other_hostnames='iankelling.org;zroe.org;r2e.iankelling.org;mx.iankelling.org;!je.b8.nz;!bk.b8.nz;*.b8.nz;b8.nz'
2786 EOF
2787
2788
2789     # dmarc. not used currently
2790     f=/etc/cron.daily/refresh-dmarc-tld-file
2791     cat >$f <<'EOF'
2792 #!/bin/bash
2793 cd /etc
2794 wget -q -N https://publicsuffix.org/list/public_suffix_list.dat
2795 EOF
2796     m chmod 755 $f
2797
2798     ;;
2799   # ** bk
2800   ## we use this host to monitor MAIL_HOST and host a mail server for someone
2801   bk)
2802
2803     echo|i /etc/exim4/conf.d/rcpt_local_acl
2804     echo|i /etc/exim4/conf.d/router/880_universal_forward
2805
2806     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2807 10.173.8.2 nn.b8.nz
2808 EOF
2809
2810     sed -r -f - /etc/init.d/exim4  <<'EOF' | i /etc/init.d/exim4in
2811 s,/etc/default/exim4,/etc/default/exim4in,g
2812 s,/run/exim4/exim.pid,/run/exim4/eximin.pid,g
2813 s,(^[ #]*Provides:).*,\1 exim4in,
2814 s,(^[ #]*NAME=).*,\1"exim4in",
2815 EOF
2816     chmod +x /etc/init.d/exim4in
2817     i /etc/systemd/system/exim4in.service.d/alwaysrestart.conf <<'EOF'
2818 [Unit]
2819 # needed to continually restart
2820 StartLimitIntervalSec=0
2821
2822 [Service]
2823 Restart=always
2824 # time to sleep before restarting a service
2825 RestartSec=20
2826 EOF
2827
2828     i /etc/default/exim4in <<'EOF'
2829 # defaults but no queue runner and alternate config dir
2830 QUEUERUNNER='no'
2831 COMMONOPTIONS='-oP /run/exim4/eximin.pid'
2832 UPEX4OPTS='-d /etc/myexim4'
2833 EOF
2834
2835     echo bk.b8.nz > /etc/mailname
2836     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2837 # man page: is used to build the local_domains list, together with "localhost"
2838 dc_other_hostnames='amnimal.ninja;expertpathologyreview.com;bk.b8.nz'
2839 EOF
2840
2841     ;;
2842   # ** je
2843   je)
2844     echo je.b8.nz > /etc/mailname
2845     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2846 dc_other_hostnames='je.b8.nz'
2847 EOF
2848     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2849     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2850     echo|i /etc/exim4/conf.d/rcpt_local_acl
2851     echo|i /etc/exim4/conf.d/router/880_universal_forward
2852     ;;
2853   # ** not MAIL_HOST|bk|je
2854   *)
2855     # this one should be removed for all non mail hosts, but
2856     # bk and je never become mail_host
2857     echo|i /etc/exim4/conf.d/router/195_dnslookup_vpn
2858
2859     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2860     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2861     echo|i /etc/exim4/conf.d/rcpt_local_acl
2862     echo|i /etc/exim4/conf.d/router/890_backup_copy
2863     echo|i /etc/exim4/conf.d/main/000_local-nn
2864
2865
2866     if $bhost_t; then
2867       cat >>/etc/exim4/conf.d/main/000_local <<EOF
2868 MAIN_TLS_CERTIFICATE = /etc/exim4/certs/$wghost/fullchain.pem
2869 MAIN_TLS_PRIVATEKEY = /etc/exim4/certs/$wghost/privkey.pem
2870 # so we can maintiain the originals of the backups.
2871 # we wouldnt want this if we were dealing with any other
2872 # local deliveries, but we sent all others to the smarthost
2873 # which then strips the headers.
2874 envelope_to_remove = false
2875 return_path_remove = false
2876 EOF
2877     fi
2878
2879     # catches things like cronjob email
2880     i /etc/exim4/conf.d/router/880_universal_forward <<'EOF'
2881 universal_forward:
2882   driver = redirect
2883   domains = +local_domains
2884   data = alerts@iankelling.org
2885 EOF
2886
2887
2888     for unit in ${nn_progs[@]}; do
2889       f=/etc/systemd/system/$unit.service.d/nn.conf
2890       rm -fv $f
2891     done
2892
2893     # dont i dont care if defaultnn section gets left, it wont
2894     # get used.
2895     echo | /a/exe/cedit nn /etc/hosts || [[ $? == 1 ]]
2896     echo | /a/exe/cedit mail /etc/dnsmasq-servers.conf || [[ $? == 1 ]]
2897
2898
2899     if $bhost_t; then
2900       install -d /bu
2901       install -d -g Debian-exim -o Debian-exim -m 771 /bu/md
2902       if [[ -e /bu/md/cur && $(stat -c %u /bu/md/cur) == 1000 ]]; then
2903         chown -R Debian-exim:Debian-exim /bu/md
2904       fi
2905       i /etc/exim4/conf.d/transport/30_backup_maildir <<EOF
2906 # modified debian maildir transport
2907 backup_maildir:
2908   driver = appendfile
2909   directory = /bu/md
2910   delivery_date_add
2911   # note, no return path or envelope added
2912   maildir_format
2913   directory_mode = 0700
2914   mode = 0644
2915   mode_fail_narrower = false
2916 EOF
2917
2918       i /etc/exim4/conf.d/router/870_backup_local <<'EOF'
2919 ### router/900_exim4-config_local_user
2920 #################################
2921
2922 backup_local:
2923   debug_print = "R: local_user for $local_part@$domain"
2924   driver = accept
2925   domains = eximbackup.b8.nz
2926   transport = backup_maildir
2927 EOF
2928
2929       # Bind to wghole to receive mailbackup.
2930       wgholeip=$(sed -rn 's/^ *Address *= *([^/]+).*/\1/p' /etc/wireguard/wghole.conf)
2931       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2932 dc_other_hostnames='eximbackup.b8.nz'
2933 dc_local_interfaces='127.0.0.1;::1;$wgholeip'
2934 EOF
2935
2936       # wghole & thus exim will fail to start without internet connectivity.
2937       i /etc/systemd/system/exim4.service.d/backup.conf <<'EOF'
2938 [Unit]
2939 StartLimitIntervalSec=0
2940
2941 [Service]
2942 Restart=always
2943 RestartSec=20
2944 EOF
2945
2946     else
2947       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2948 # Note: If theres like a temporary problem where mail gets sent to
2949 # one of these hosts, if exim isnt listening, it will be a temporary error
2950 # instead of a permanent 5xx.
2951 dc_local_interfaces='127.0.0.1;::1'
2952 EOF
2953       rm -fv /etc/systemd/system/exim4.service.d/backup.conf
2954     fi
2955     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2956 dc_eximconfig_configtype='smarthost'
2957 dc_smarthost='$smarthost'
2958 EOF
2959
2960     hostname -f |i /etc/mailname
2961     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2962 # The manpage incorrectly states this will do header rewriting, but
2963 # that only happens if we have dc_hide_mailname is set.
2964 dc_readhost='iankelling.org'
2965 # Only used in case of bounces.
2966 dc_localdelivery='maildir_home'
2967 EOF
2968     ;;
2969 esac
2970
2971
2972
2973
2974 # ** $MAILHOST|bk, things that belong at the end
2975 case $HOSTNAME in
2976   $MAIL_HOST|bk)
2977     # config for the non-nn exim
2978     m rsync -ra --delete /etc/exim4/ /etc/myexim4
2979     cat >>/etc/myexim4/conf.d/main/000_local-nn <<'EOF'
2980 # this makes it easier to see which exim is doing what
2981 log_file_path = /var/log/exim4/my%s
2982 EOF
2983
2984     cat >/etc/logrotate.d/myexim <<'EOF'
2985 /var/log/exim4/mymain /var/log/exim4/myreject {
2986         daily
2987         missingok
2988         rotate 1000
2989         delaycompress
2990         notifempty
2991         nocreate
2992 }
2993 /var/log/exim4/mypanic {
2994         size 10M
2995         missingok
2996         rotate 10
2997         compress
2998         delaycompress
2999         notifempty
3000         nocreate
3001 }
3002 EOF
3003
3004     # If we ever wanted to have a separate spool,
3005     # we could do it like this.
3006     #     cat >>/etc/exim4/conf.d/main/000_local-nn <<'EOF'
3007     # spool_directory = /var/spool/myexim4
3008     # EOF
3009     cat >>/etc/myexim4/update-exim4.conf.conf <<'EOF'
3010 dc_eximconfig_configtype='smarthost'
3011 dc_smarthost='nn.b8.nz'
3012 EOF
3013     ;;&
3014   bk)
3015
3016     # config for the non-nn exim
3017     cat >/etc/myexim4/conf.d/main/000_local-nn <<'EOF'
3018 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail2.iankelling.org
3019 EOF
3020     ;;
3021   $MAIL_HOST)
3022     # for bk, we have a exim4in.service that will do this for us.
3023     m update-exim4.conf -d /etc/myexim4
3024     ;;
3025 esac
3026
3027 # * spool dir setup
3028
3029 # ** bind mount setup
3030 # put spool dir in directory that spans multiple distros.
3031 # based on http://www.postfix.org/qmgr.8.html and my notes in gnus
3032 #
3033 dir=/nocow/exim4
3034 sdir=/var/spool/exim4
3035 # we only do this if our system has $dir
3036
3037 # this used to do a symlink, but, in the boot logs, /nocow would get mounted succesfully,
3038 # about 2 seconds later, exim starts, and immediately puts into paniclog:
3039 # honVi-0000u3-82 Failed to create directory "/var/spool/exim4/input": No such file or directory
3040 # so, im trying a bind mount to get rid of that.
3041 if [[ -e /nocow ]]; then
3042   if ! grep -Fx "/nocow/exim4  /var/spool/exim4  none  bind  0 0" /etc/fstab; then
3043     echo "/nocow/exim4  /var/spool/exim4  none  bind  0 0" >>/etc/fstab
3044   fi
3045   i /etc/systemd/system/exim4.service.d/override.conf <<'EOF'
3046 [Unit]
3047 # without local-fs on exim, we get these kind of errors in paniclog on shutdown:
3048 # Failed to create spool file /var/spool/exim4//input//1jCLxz-0008V4-V9-D: Permission denied
3049 After=local-fs.target
3050
3051 [Service]
3052 ExecStartPre=/usr/local/bin/exim-nn-iptables
3053 EOF
3054   if ! mountpoint -q $sdir; then
3055     stopifactive exim4 exim4in
3056     if [[ -L $sdir ]]; then
3057       m rm $sdir
3058     fi
3059     if [[ ! -e $dir && -d $sdir ]]; then
3060       m mv $sdir $dir
3061     fi
3062     if [[ ! -d $sdir ]]; then
3063       m mkdir $sdir
3064       m chmod 000 $sdir # only want it to be used when its mounted
3065     fi
3066     m mount $sdir
3067   fi
3068 fi
3069
3070
3071
3072 # ** exim/spool uid setup
3073 # i have the spool directory be common to distro multi-boot, so
3074 # we need the uid to be the same. 608 cuz it's kind of in the middle
3075 # of the free system uids.
3076 IFS=:; read -r _ _ uid _ < <(getent passwd Debian-exim ||:) ||:; unset IFS
3077 IFS=:; read -r _ _ gid _ < <(getent group Debian-exim ||:) ||:; unset IFS
3078 if [[ ! $uid ]]; then
3079   # from /var/lib/dpkg/info/exim4-base.postinst, plus uid and gid options
3080   m adduser --uid 608 --system --group --quiet --home /var/spool/exim4 \
3081     --no-create-home --disabled-login --force-badname Debian-exim
3082 elif [[ $uid != 608 ]]; then
3083   stopifactive exim4 exim4in
3084   m usermod -u 608 Debian-exim
3085   m groupmod -g 608 Debian-exim
3086   m usermod -g 608 Debian-exim
3087   m find / /nocow -xdev -path ./var/tmp -prune -o -uid $uid -execdir chown -h 608 {} +
3088   m find / /nocow -xdev -path ./var/tmp -prune -o -gid $gid -execdir chgrp -h 608 {} +
3089 fi
3090
3091 # * start / stop services
3092
3093 reifactive dnsmasq nscd
3094
3095 if $reload; then
3096   m systemctl daemon-reload
3097 fi
3098
3099 sysd-prom-fail-install epanicclean
3100 m systemctl --now enable epanicclean
3101
3102 case $HOSTNAME in
3103   je)
3104     /a/exe/web-conf apache2 je.b8.nz
3105     ;;
3106   bk)
3107     /a/exe/web-conf apache2 mail2.iankelling.org
3108     ;;
3109 esac
3110
3111 m /a/bin/ds/mail-cert-cron -1
3112 sre mailcert.timer
3113
3114 case $HOSTNAME in
3115   $MAIL_HOST|bk)
3116     m systemctl --now enable mailnn mailnnroute
3117     ;;&
3118   $MAIL_HOST)
3119     # we use dns to start wg
3120     if $reload; then
3121       sre unbound
3122     else
3123       m systemctl --now enable unbound
3124     fi
3125     ;;&
3126   $MAIL_HOST|bk)
3127     # If these have changes, id rather manually restart it, id rather
3128     # not restart and cause temporary errors
3129     if $reload; then
3130       sre $vpnser
3131     else
3132       m systemctl --now enable $vpnser
3133     fi
3134     if ! systemctl is-active clamav-daemon >/dev/null; then
3135       m systemctl --now enable clamav-daemon
3136       out=$(rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/filesystem/etc/systemd/system/epanicclean.service /etc/systemd/system)
3137       if [[ $out ]]; then
3138         reload=true
3139       fi
3140
3141       # note, this will cause paniclog entries because it takes like 45
3142       # seconds for clamav to start, i use ./epanic-clean to remove
3143       # them.
3144     fi
3145     ;;&
3146   $MAIL_HOST|bk|je)
3147     # start spamassassin/dovecot before exim.
3148     sre dovecot spamassassin
3149     # need to wait a bit before restarting exim, else I
3150     # get a paniclog entry like: spam acl condition: all spamd servers failed
3151     sleep 3
3152     m systemctl --now enable mailclean.timer
3153     ;;&
3154   $MAIL_HOST)
3155     # < 2.1 (eg: in t9), uses a different data format which required manual
3156     # migration. dont start if we are running an old version.
3157     if dpkg --compare-versions $(dpkg -s radicale | awk '$1 == "Version:" { print $2 }') ge 2.1; then
3158       m systemctl --now enable radicale
3159     fi
3160     ;;&
3161 esac
3162
3163 # last use of $reload happens in previous block
3164 rm -f /var/local/mail-setup-reload
3165
3166
3167 case $HOSTNAME in
3168   $MAIL_HOST|bk|je|li)
3169     # on li, these are never started, except $vpnser
3170     :
3171     ;;
3172   *)
3173     soff radicale mailclean.timer dovecot spamassassin $vpnser mailnn clamav-daemon
3174     ;;
3175 esac
3176
3177 sre exim4
3178
3179 case $HOSTNAME in
3180   $MAIL_HOST)
3181     m systemctl --now enable mailbindwatchdog
3182     ;;
3183   *)
3184     soff mailbindwatchdog
3185     ;;
3186 esac
3187
3188
3189 case $HOSTNAME in
3190   bk) sre exim4in ;;
3191 esac
3192
3193 # * mail monitoring / testing
3194
3195 # note, to test clamav, send an email with body that only contains
3196 # https://en.wikipedia.org/wiki/EICAR_test_file
3197 # which set malware_name to Eicar-Signature
3198 case $HOSTNAME in
3199   $MAIL_HOST|bk|je)
3200     # note: cronjob "ian" also does some important monitoring
3201     # todo: this will sometimes cause an alert because mailtest-check will run
3202     # before we have setup network namespace and spamassassin
3203     i /etc/cron.d/mailtest <<EOF
3204 SHELL=/bin/bash
3205 PATH=/usr/bin:/bin:/usr/local/bin
3206 MAILTO=daylert@iankelling.org
3207 */5  * * * *   $u send-test-forward |& log-once send-test-forward
3208 */10 * * * *   root chmod -R g+rw /m/md/bounces |& log-once -1 bounces-chmod
3209 # if a bounce happened yesterday, dont let it slip through the cracks
3210 8   1 * * *   root export MAILTO=alerts@iankelling.org; [[ -s /var/log/exim4/mainlog.1 ]] && awk '\$5 == "**"' /var/log/exim4/mainlog.1
3211 EOF
3212
3213
3214     m sudo rsync -ahhi --chown=root:root --chmod=0755 \
3215       /b/ds/mailtest-check /b/ds/check-remote-mailqs /usr/local/bin/
3216     i /etc/systemd/system/mailtest-check.service <<'EOF'
3217 [Unit]
3218 Description=mailtest-check
3219 After=local-fs.target
3220 StartLimitIntervalSec=0
3221
3222 [Service]
3223 Type=simple
3224 ExecStart=/usr/local/bin/mailtest-check slow
3225 Restart=always
3226 RestartSec=60
3227
3228 [Install]
3229 WantedBy=graphical.target
3230 EOF
3231     sysd-prom-fail-install mailtest-check
3232     sre mailtest-check
3233     ;;&
3234   $MAIL_HOST)
3235     test_froms=(ian@iankelling.org z@zroe.org iank@gnu.org)
3236     test_tos=(testignore@expertpathologyreview.com testignore@je.b8.nz testignore@amnimal.ninja jtuttle@gnu.org)
3237
3238     cat >>/etc/cron.d/mailtest <<EOF
3239 0   13 * * *  root echo "1pm alert. You are not in the matrix."
3240 2   * * * *   root check-remote-mailqs |& log-once check-remote-mailqs
3241 EOF
3242     ;;&
3243   bk)
3244     test_froms=(testignore@amnimal.ninja testignore@expertpathologyreview.com)
3245     test_tos=(testignore@iankelling.org testignore@je.b8.nz)
3246     # We dont need to send from different addresses to the same
3247     # address. this breaks down our nice elegant logic of building up
3248     # froms and tos , so I just handle expertpath in a special case
3249     # below and set the to: to be testignore@zroe.org.  If we did sent
3250     # that way, it would also mess up our mailtest-check logic that
3251     # finds which messages to check.
3252     # for example: from testignore@amnimal.ninja to: testignore@iankelling.org testignore@zroe.org
3253     # that would become 2 messages and we'd only check 1.
3254     ;;&
3255   je)
3256     test_froms=(testignore@je.b8.nz)
3257     test_tos=(testignore@iankelling.org testignore@zroe.org testignore@expertpathologyreview.com testignore@amnimal.ninja)
3258     ;;&
3259   $MAIL_HOST|bk|je)
3260
3261     # Dont put these test messages into the sent folder or else it will
3262     # overwhelm it, plus i dont want to save a copy at all.
3263     rm -f /etc/exim4/ignore-sent
3264     for t in ${test_tos[@]}; do
3265       echo $t >> /etc/exim4/ignore-sent
3266     done
3267
3268     cat >/usr/local/bin/send-test-forward <<'EOF'
3269 #!/bin/bash
3270 # we remove from the queue older than 4.3 minutes since we send every 5 minutes.
3271 olds=(
3272 $(/usr/sbin/exiqgrep -o 260 -i -r '^(testignore@(iankelling\.org|zroe\.org|expertpathologyreview\.com|amnimal\.ninja|je\.b8\.nz)|jtuttle@gnu\.org)$')
3273 )
3274 if (( ${#olds[@]} )); then
3275   /usr/sbin/exim -Mrm "${olds[@]}" >/dev/null
3276 fi
3277 EOF
3278     for test_from in ${test_froms[@]}; do
3279
3280       test_to=${test_tos[0]}
3281       for t in ${test_tos[@]:1}; do
3282         test_to+=", $t"
3283       done
3284       case $test_from in
3285         testignore@expertpathologyreview.com)
3286           test_to=testignore@zroe.org
3287           ;;
3288       esac
3289
3290       cat >>/usr/local/bin/send-test-forward <<EOFOUTER
3291 /usr/sbin/exim -f $test_from -t <<EOF
3292 From: $test_from
3293 To: $test_to
3294 Subject: test \$(date +%Y-%m-%dT%H:%M:%S%z) \$EPOCHSECONDS
3295
3296 /usr/local/bin/send-test-forward
3297 EOF
3298 EOFOUTER
3299     done
3300     m chmod +x /usr/local/bin/send-test-forward
3301     ;;
3302   *)
3303     soff mailtest-check.service
3304     rm -fv /etc/cron.d/mailtest /var/lib/prometheus/node-exporter/mailtest-check.prom*
3305     ;;
3306 esac
3307
3308
3309
3310 # * misc
3311 m sudo -u $u mkdir -p /home/$u/.cache
3312 set -- /m/mucache /home/$u/.cache/mu /m/.mu /home/$u/.mu
3313 while (($#)); do
3314   target=$1
3315   f=$2
3316   shift 2
3317   if [[ ! -L $f ]]; then
3318     if [[ -e $f ]]; then
3319       rm -rf $f
3320     fi
3321     m sudo -u $u ln -sf -T $target $f
3322   fi
3323 done
3324
3325
3326 # /etc/alias setup is debian specific, and exim postinst script sets up
3327 # an /etc/alias from root to the postmaster, based on the question
3328 # exim4-config exim4/dc_postmaster, as long as there exists an entry for
3329 # root, or there was no preexisting aliases file. postfix won\'t set up
3330 # a root to $postmaster alias if it\'s already installed. Easiest to
3331 # just set it ourselves.
3332
3333 # debconf question for postmaster:
3334 # Mail for the 'postmaster', 'root', and other system accounts needs to be redirected
3335 # to the user account of the actual system administrator.
3336 # If this value is left empty, such mail will be saved in /var/mail/mail, which is not
3337 # recommended.
3338 # Note that postmaster\'s mail should be read on the system to which it is directed,
3339 # rather than being forwarded elsewhere, so (at least one of) the users listed here
3340 # should not redirect their mail off this machine. A 'real-' prefix can be used to
3341 # force local delivery.
3342 # Multiple user names need to be separated by spaces.
3343 # Root and postmaster mail recipient:
3344
3345 m exit 0
3346 :
3347
3348 # Local Variables:
3349 # eval: (outline-minor-mode)
3350 # outline-regexp: "\\( *\\)# [*]\\{1,8\\} "
3351 # End:
3352 # this is combined with defining outline-level in init.el