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

   1 #!/bin/bash
   2 # * intro
   3 # Copyright (C) 2019 Ian Kelling
   4 # SPDX-License-Identifier: AGPL-3.0-or-later
   5
   6 # todo: handle errors like this:
   7 # Mar 02 12:44:26 kw systemd[1]: exim4.service: Found left-over process 68210 (exim4) in control group while starting unit. Ignoring.
   8 # Mar 02 12:44:26 kw systemd[1]: This usually indicates unclean termination of a previous run, or service implementation deficiencies.
   9
  10 #  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.
  11 #  todo: consider hardening cups listening on 0.0.0.0
  12 #  todo: stop/disable local apache, and rpc.mountd, and kdeconnect when not in use.
  13 #  todo: check that spamd and unbound only listen locally.
  14
  15 # todo:  hosts should only allow external mail that is authed and
  16 # destined for backup route. it is a minor issue since traffic is
  17 # limited to the wghole network.
  18
  19 # todo: emailing info@amnimal.ninja produces a bounce, user doesn't exist
  20 # instead of a simple rejection like it should.
  21
  22 # todo: run mailping test after running, or otherwise
  23 # clear out terminal alert
  24
  25 # todo: reinstall bk with bigger filesystem
  26
  27 # todo: on bk, dont send email if mailvpn is not up
  28
  29 # todo: mailtest-check should check on bk too
  30
  31 # todo: disable postgrey
  32
  33 # todo: in testforward-check, we should also look
  34
  35 # todo: test that bounces dont help create valid mailtest-check
  36
  37 # todo: move mail stuff in distro-end into this file
  38
  39 # todo: consider rotating dkim & publishing key so every past email I sent
  40 # isnt necessarily signed
  41
  42 # todo: consider how to get clamav out of Debian-exim group
  43 # so it cant read/write the whole mail spool, for better
  44 # security.
  45
  46 # todo: create a cronjob to update or warn on expiring dnssec keys
  47
  48 # todo: we should test failed mail daily or so
  49 # failed cronjob, failed sysd-log-once,
  50 # a local bounce from a cronjob, a local bounce
  51 # to a bad remote address, perhaps a local failure
  52 # when the sending daemon is down.
  53 # And send an alert email if no alerts have been sent
  54 # in 2 or 3 days or something. todo, test cron mail on li.
  55
  56 # todo: look at mailinabox extra dns records, note these changelogs:
  57 # - 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.
  58 # - 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.
  59 #
  60
  61 # todo: mailtest-check failure on remote hosts is not going to alert me.
  62 # sort that out.
  63 # todo: test mail failure as well as success.
  64 #
  65 # todo: validate that mailtest-check is doing dnsbl checks.
  66
  67 # background: I want to run exim in a network namespace so it can send
  68 # and receive through a vpn. This is needed so it can do ipv6, because
  69 # outside the namespace if we dont have ipv6, to send ipv6 through the
  70 # vpn, we have to send all our ipv6 through the vpn. I did this for a
  71 # long time, it was fine, but it causes various pains, like increased
  72 # latency, increased recaptcha because my ip is from a data center, just
  73 # various issues I dont want on all the time. The problem with the
  74 # namespace is that all kinds of programs want to invoke exim, but they
  75 # wont be in the namespace. I could replace exim with a wrapper that
  76 # jumps into the namespace, i tried that, it works fine.  One remaining
  77 # problem was that I would have needed to hook into exim upgrades to
  78 # move exim and replace it with my wrapper script. Also, my script to
  79 # join the namespace is not super reliable because it uses a pgrep.
  80 # Instead, I should have created a systemd service for a process that
  81 # will never die and just writes its pid somewhere convenient.
  82 # That implementation
  83 # is below here:
  84 #
  85 # sudoers:
  86 # user ALL=(ALL) /usr/sbin/exim4
  87 #
  88 # move exim4 to eximian, use this script for exim4:
  89 #
  90 # #!/bin/bash
  91 # if ip a show veth1-mail &>/dev/null; then
  92 #   /usr/sbin/eximian "$@"
  93 #   exit
  94 # fi
  95 # dosudo=false
  96 # if [[ $USER && $USER != root ]]; then
  97 #   dosudo=true
  98 # fi
  99 # pid=$(pgrep -f "/usr/sbin/openvpn .* --config /etc/openvpn/.*mail.conf")
 100 # if $dosudo; then
 101 #   sudo nsenter -t $pid -n -m sudo -u $USER /usr/sbin/eximian "$@"
 102 # else
 103 #   nsenter -t $pid -n -m /usr/sbin/eximian "$@"
 104 # fi
 105 # ## end script
 106 #
 107 # an alternate solution: there is a small setguid program for
 108 # network namespaces in my bookmarks.
 109 #
 110 # However, the solution I went with is: have 2 exim
 111 # configs. A nonstandard location for the daemon that runs
 112 # in the namespace. For all other invocations, it uses
 113 # the default config location, which is altered to be
 114 # in a smarthost config which sends mail to the deaemon.
 115 #
 116 # I have a bash function, enn to invoke exim like the daemon is running.
 117 # and mailbash to just enter its network namespace.
 118
 119 if [ -z "$BASH_VERSION" ]; then echo "error: shell is not bash" >&2; exit 1; fi
 120
 121 shopt -s nullglob
 122
 123 if [[ -s /usr/local/lib/err ]]; then
 124   source /usr/local/lib/err
 125 elif [[ -s /a/bin/errhandle/err ]]; then
 126   source /a/bin/errhandle/err
 127 else
 128   err "no err tracing script found"
 129 fi
 130 source /a/bin/distro-functions/src/identify-distros
 131 source /a/bin/distro-functions/src/package-manager-abstractions
 132
 133 # has nextcloud_admin_pass in it
 134 f=/p/c/machine_specific/$HOSTNAME/mail
 135 if [[ -e $f ]]; then
 136   # shellcheck source=/p/c/machine_specific/bk/mail
 137   source $f
 138 fi
 139
 140
 141 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
 142
 143 # note, this is hardcoded in /etc/exim4/conf.d/main/000_local
 144 u=$(id -nu 1000)
 145
 146
 147 usage() {
 148   cat <<EOF
 149 Usage: ${0##*/} anything_here_to_debug
 150 Setup exim4 & dovecot & related things
 151
 152 -h|--help  Print help and exit.
 153 EOF
 154   exit $1
 155 }
 156
 157 # debug output if we pass any arg
 158 if (( $# )); then
 159   set -x
 160 fi
 161
 162
 163 ####### instructions for icedove #####
 164 # Incoming mail server: mail.iankelling.org, port 143, username iank, connection security starttls, authentication method normal password,
 165 # then click advanced so it accepts it.
 166 # we could also just use 127.0.0.1 with no ssl
 167 #
 168 # hamburger -> preferences -> preferences -> advanced tab -> config editor button -> security.ssl.enable_ocsp_must_staple = false
 169 # background: dovecot does not yet have ocsp stapling support
 170 # reference: https://community.letsencrypt.org/t/simple-guide-using-lets-encrypt-ssl-certs-with-dovecot/2921
 171 #
 172 # for phone, k9mail, same thing but username alerts, pass in ivy-pass.
 173 # also, bk.b8.nz for secondary alerts, username is iank. same alerts pass.
 174 # fetching mail settings: folder poll frequency 10 minutes
 175 #######
 176
 177
 178 # * perstent password instructions
 179 # Note: for cert cron, we need to manually run first to accept known_hosts
 180
 181 # # exim passwords:
 182 # # for hosts which have all private files I just use the same user
 183 # # for other hosts, each one get\'s their own password.
 184 # # for generating secure pass, and storing for server too:
 185 # f=$(mktemp)
 186 # host=tp
 187 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$f
 188 # s sed -i "/^$host:/d" /p/c/filesystem/etc/exim4/passwd
 189 # echo "$host:$(mkpasswd -m sha-512 -s <$f)" >>/p/c/filesystem/etc/exim4/passwd
 190 # #reference: exim4_passwd_client(5)
 191 # dir=/p/c/machine_specific/$host/filesystem/etc/exim4
 192 # mkdir -p $dir
 193 # echo "mail.iankelling.org:$host:$(<$f)" > $dir/passwd.client
 194 # # then run this script
 195
 196 # # dovecot password, i just need 1 as I\'m the only user
 197 # mkdir /p/c/filesystem/etc/dovecot
 198 # echo "iank:$(doveadm pw -s SHA512-CRYPT)::::::" >>/p/c/filesystem/etc/dovecot/users
 199
 200 ####### end perstent password instructions ######
 201
 202
 203 # * dkim dns
 204 # # Remove 1 level of comments in this section, set the domain var
 205 # # for the domain you are setting up, then run this and copy dns settings
 206 # # into dns.
 207 # domain=iankelling.org
 208 # c /p/c/filesystem/etc/exim4
 209 # # this has several bugs addressed in comments, but it was helpful
 210 # # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
 211
 212 # openssl genrsa -out $domain-private.pem 2048
 213 # # Then, to get the public key strings to put in bind:
 214
 215 # # selector is needed for having multiple keys for one domain.
 216 # # I dun do that, so just use a static one: li
 217 # # Debadmin page does not have v=, fastmail does, and this
 218 # # says it\'s recommended in 3.6.1, default is DKIM1 anyways.
 219 # # https://www.ietf.org/rfc/rfc6376.txt
 220 # # Join and print all but first and last line.
 221 # # last line: swap hold & pattern, remove newlines, print.
 222 # # lines 2+: append to hold space
 223 # echo "bind txt record: remember to truncate $domain so its relative to the bind zone"
 224 # cat <<EOF
 225 # a._domainkey.$domain  TXT     (
 226 # "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')" )
 227 # EOF
 228 # # sed explanation: skip the first few lines, then put them into the hold space, then
 229 # # on the last line, back to the patern space, remove the newlines, then add a newline
 230 # # at the last char - 240, because bind txt records need strings <=255 chars,
 231 # # other dkim stuff at the begining is is 25 chars, and the pubkey is 393, so this
 232 # # leaves us a bit of extra room at the end and a bunch at the beginning.
 233
 234 # # selector was also put into /etc/exim4/conf.d/main/000_local,
 235
 236 # * dmarc dns
 237
 238 # # 2017-02 dmarc policies:
 239 # # host -t txt _dmarc.gmail.com
 240 # # yahoo: p=reject, hotmail: p=none, gmail: p=none, fastmail none for legacy reasons
 241 # # there were articles claiming gmail would be  changing
 242 # # to p=reject, in early 2017, which didn\'t happen. I see no sources on them. It\'s
 243 # # expected to cause problems
 244 # # with a few old mailing lists, copying theirs for now.
 245 #
 246 # echo "dmarc dns, name: _dmarc value: v=DMARC1; p=none; rua=mailto:mailauth-reports@$domain"
 247
 248 # * other dns
 249
 250 # # 2017-02 spf policies:
 251 # # host -t txt lists.fedoraproject.org
 252 # # google ~all, hotmail ~all, yahoo: ?all, fastmail ?all, outlook ~all
 253 # # i include fastmail\'s settings, per their instructions,
 254 # # and follow their policy. In mail in a box, or similar instructions,
 255 # # I\'ve seen recommended to not use a restrictive policy.
 256
 257 # # to check if dns has updated, you do
 258 # host -a mesmtp._domainkey.$domain
 259
 260 # # mx records,
 261 # # setting it to iankelling.org would work the same, but this
 262 # # is more flexible, I could change where mail.iankelling.org pointed.
 263 # cat <<'EOF'
 264 # mx records, 2 records each, for * and empty domain
 265 # pri 10 mail.iankelling.org
 266 # EOF
 267
 268 # # dnssec
 269 # from brc2, run dnsecgen then dsign, update named.local.conf, publish keys to registrar
 270
 271 # * functions & constants
 272
 273 pre="${0##*/}:"
 274 m() { printf "$pre %s\n"  "$*"; "$@"; }
 275 e() { printf "$pre %s\n"  "$*"; }
 276 err() { printf "$pre %s\n"  "$*" >&2; exit 1; }
 277
 278 reload=false
 279 # This file is so if we fail in the middle and rerun, we dont lose state
 280 if [[ -e /var/local/mail-setup-reload ]]; then
 281   reload=true
 282 fi
 283 i() { # install file
 284   local tmp tmpdir dest="$1"
 285   local base="${dest##*/}"
 286   local dir="${dest%/*}"
 287   if [[ $dir != "$base" ]]; then
 288     mkdir -p ${dest%/*}
 289   fi
 290   ir=false # i result
 291   tmpdir=$(mktemp -d)
 292   cat >$tmpdir/"$base"
 293   tmp=$(rsync -ic $tmpdir/"$base" "$dest")
 294   if [[ $tmp ]]; then
 295     printf "%s\n" "$tmp"
 296     ir=true
 297     if [[ $dest == /etc/systemd/system/* ]]; then
 298       touch /var/local/mail-setup-reload
 299       reload=true
 300     fi
 301   fi
 302   rm -rf $tmpdir
 303 }
 304 setini() {
 305   key="$1" value="$2" section="$3"
 306   file="/etc/radicale/config"
 307   sed -ri "/ *\[$section\]/,/^ *\[[^]]+\]/{/^\s*${key}[[:space:]=]/d};/ *\[$section\]/a $key = $value" "$file"
 308 }
 309 soff () {
 310   for service; do
 311     # ignore services that dont exist
 312     if systemctl cat $service &>/dev/null; then
 313       m systemctl disable --now $service
 314     fi
 315   done
 316 }
 317 sre() {
 318   for service; do
 319     m systemctl restart $service
 320     m systemctl enable $service;
 321   done
 322 }
 323 mailhost() {
 324   [[ $HOSTNAME == "$MAIL_HOST" ]]
 325 }
 326 e() { printf "%s\n" "$*"; }
 327 reifactive() {
 328   for service; do
 329     if systemctl is-active $service >/dev/null; then
 330       m systemctl restart $service
 331     fi
 332   done
 333 }
 334 stopifactive() {
 335   for service; do
 336     if systemctl is-active $service >/dev/null; then
 337       m systemctl stop $service
 338     fi
 339   done
 340 }
 341
 342 mxhost=mx.iankelling.org
 343 mxport=587
 344 forward=$u@$mxhost
 345
 346 # old setup. left as comment for example
 347 # mxhost=mail.messagingengine.com
 348 # mxport=587
 349 # forward=ian@iankelling.org
 350
 351 smarthost="$mxhost::$mxport"
 352 uhome=$(eval echo ~$u)
 353
 354 # Somehow on one machine, a file got written with 664 perms.
 355 # just being defensive here.
 356 umask 0022
 357
 358 source /a/bin/bash_unpublished/source-state
 359 if [[ ! $MAIL_HOST ]]; then
 360   err "\$MAIL_HOST not set"
 361 fi
 362
 363 bhost_t=false
 364 case $HOSTNAME in
 365   $MAIL_HOST) : ;;
 366   kd|frodo|x2|x3|kw|sy|bo)
 367     bhost_t=true
 368     ;;
 369 esac
 370
 371
 372 # * Install universal packages
 373
 374
 375 # installs epanicclean iptables-exim ip6tables-exim
 376 /a/bin/ds/install-my-scripts
 377
 378 if [[ $(debian-codename-compat) == bionic ]]; then
 379   cat >/etc/apt/preferences.d/spamassassin <<'EOF'
 380 Package: spamassassin sa-compile spamc
 381 Pin: release n=focal,o=Ubuntu
 382 Pin-Priority: 500
 383 EOF
 384 fi
 385
 386 # light version of exim does not have sasl auth support.
 387 pi-nostart exim4 exim4-daemon-heavy spamassassin openvpn unbound clamav-daemon wireguard
 388
 389 # note: pyzor debian readme says you need to run some initialization command
 390 # but its outdated.
 391 pi spf-tools-perl p0f postgrey pyzor razor jq moreutils certbot fail2ban
 392 # bad packages that sometimes get automatically installed
 393 pu openresolv resolvconf
 394
 395 soff openvpn
 396
 397
 398 if [[ $(debian-codename) == etiona ]]; then
 399   # ip6tables stopped loading on boot. openvpn has reduced capability set,
 400   # so running iptables as part of openvpn startup wont work. This should do it.
 401   pi iptables-persistent
 402   cat >/etc/iptables/rules.v6 <<'EOF'
 403 *mangle
 404 COMMIT
 405 *nat
 406 COMMIT
 407 EOF
 408   # load it now.
 409   m ip6tables -S >/dev/null
 410 fi
 411
 412 # our nostart pi fails to avoid enabling
 413
 414
 415 # * Mail clean cronjob
 416
 417 i /etc/systemd/system/mailclean.timer <<'EOF'
 418 [Unit]
 419 Description=Run mailclean daily
 420
 421 [Timer]
 422 OnCalendar=monthly
 423
 424 [Install]
 425 WantedBy=timers.target
 426 EOF
 427
 428 i /etc/systemd/system/mailclean.service <<EOF
 429 [Unit]
 430 Description=Delete and archive old mail files
 431 After=multi-user.target
 432
 433 [Service]
 434 User=$u
 435 Type=oneshot
 436 ExecStart=/usr/local/bin/sysd-mail-once mailclean /a/bin/distro-setup/mailclean
 437 EOF
 438
 439 # * postgrey
 440
 441
 442 i /etc/default/postgrey <<'EOF'
 443 POSTGREY_OPTS="--exim --unix=/var/run/postgrey/postgrey.sock --retry-window=4 --max-age=60"
 444 EOF
 445
 446 # * clamav
 447
 448 m usermod -a -G Debian-exim clamav
 449
 450 i /etc/systemd/system/clamav-daemon.service.d/fix.conf <<EOF
 451 [Service]
 452 ExecStartPre=-/bin/mkdir /var/run/clamav
 453 ExecStartPre=/bin/chown clamav /var/run/clamav
 454 EOF
 455
 456 # * mail vpn config
 457
 458 # old.
 459 #vpnser=mailvpn.service
 460 # todo: this hangs if it cant resolv the endpoint. we
 461 # want it to just retry in the background.
 462 vpnser=wg-quick@wgmail.service
 463
 464 case $HOSTNAME in
 465   $MAIL_HOST)
 466     rsync -aiSAX --chown=root:root --chmod=g-s /p/c/filesystem/etc/wireguard/ /etc/wireguard
 467     bindpaths="/etc/127.0.0.1-resolv:/run/systemd/resolve /etc/basic-nsswitch:/etc/resolved-nsswitch:norbind"
 468     ;;&
 469   bk)
 470     bindpaths="/etc/10.173.8.1-resolv:/etc/127.0.0.1-resolv"
 471     ;;&
 472   *)
 473     d=/p/c/machine_specific/$HOSTNAME/filesystem/etc/wireguard/
 474     if [[ -d $d ]]; then
 475       rsync -aiSAX --chown=root:root --chmod=g-s $d  /etc/wireguard
 476     fi
 477     ;;
 478 esac
 479
 480 case $HOSTNAME in
 481   li) : ;;
 482   *)
 483     i /etc/systemd/system/wg-quick@wgmail.service.d/override.conf <<EOF
 484 [Unit]
 485 Requires=mailnn.service
 486 After=network.target mailnn.service
 487 JoinsNamespaceOf=mailnn.service
 488 BindsTo=mailnn.service
 489 StartLimitIntervalSec=0
 490
 491 [Service]
 492 PrivateNetwork=true
 493 # i dont think we need any of these, but it doesnt hurt to stay consistent
 494 BindPaths=$bindpaths
 495
 496 Restart=on-failure
 497 RestartSec=20
 498 EOF
 499     ;;
 500 esac
 501
 502
 503 # https://selivan.github.io/2017/12/30/systemd-serice-always-restart.html
 504 i /etc/systemd/system/mailvpn.service <<EOF
 505 [Unit]
 506 Description=OpenVPN tunnel for mail
 507 After=syslog.target network-online.target mailnn.service
 508 Wants=network-online.target
 509 Documentation=man:openvpn(8)
 510 Documentation=https://community.openvpn.net/openvpn/wiki/Openvpn24ManPage
 511 Documentation=https://community.openvpn.net/openvpn/wiki/HOWTO
 512 # needed to continually restatr
 513 JoinsNamespaceOf=mailnn.service
 514 BindsTo=mailnn.service
 515 StartLimitIntervalSec=0
 516
 517 [Service]
 518 Type=notify
 519 RuntimeDirectory=openvpn-client
 520 RuntimeDirectoryMode=0710
 521 WorkingDirectory=/etc/openvpn/client
 522 ExecStart=/usr/sbin/openvpn --suppress-timestamps --nobind --config /etc/openvpn/client/mail.conf
 523 #CapabilityBoundingSet=CAP_IPC_LOCK CAP_NET_ADMIN CAP_NET_RAW CAP_SETGID CAP_SETUID CAP_SYS_CHROOT CAP_DAC_OVERRIDE
 524 LimitNPROC=10
 525 # DeviceAllow=/dev/null rw
 526 # DeviceAllow=/dev/net/tun rw
 527 PrivateNetwork=true
 528 # in the network namespace, we cant connect to systemd-resolved on 127.0.0.53,
 529 # because of
 530 # https://unix.stackexchange.com/questions/445782/how-to-allow-systemd-resolved-to-listen-to-an-interface-other-than-loopback
 531 # there is a workaround there, but i dont think its really worth it,
 532 # the mail server is fine with a static dns anyways.
 533 # This thread is also interesting,
 534 # https://github.com/slingamn/namespaced-openvpn/issues/7
 535 # todo: the iptables rule at the bottom could be useful to prevent
 536 # dns from leaking in my network namespaced vpn.
 537 # I also like the idea of patching systemd-resolved so it
 538 # will listen on other interfaces, but its not worth my time.
 539 BindPaths=$bindpaths
 540 Restart=always
 541 # time to sleep before restarting a service
 542 RestartSec=20
 543
 544 [Install]
 545 WantedBy=multi-user.target
 546 EOF
 547
 548 i /etc/systemd/system/mailnnroute.service <<'EOF'
 549 [Unit]
 550 Description=Network routing for mailnn
 551 After=syslog.target network-online.target mailnn.service
 552 Wants=network-online.target
 553 JoinsNamespaceOf=mailnn.service
 554 BindsTo=mailnn.service
 555 StartLimitIntervalSec=0
 556
 557 [Service]
 558 Type=simple
 559 RemainAfterExit=true
 560 PrivateNetwork=true
 561 ExecStart=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns -n 10.173.8 start mail
 562 ExecStop=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns stop mail
 563 Restart=always
 564 RestartSec=20
 565
 566
 567 [Install]
 568 WantedBy=multi-user.target
 569 EOF
 570
 571 #
 572 i /etc/systemd/system/mailnn.service <<'EOF'
 573 [Unit]
 574 Description=Network Namespace for mail vpn service that will live forever and cant fail
 575 After=syslog.target network-online.target
 576 Wants=network-online.target
 577
 578 [Service]
 579 Type=simple
 580 PrivateNetwork=true
 581 ExecStart=/bin/sleep infinity
 582
 583 [Install]
 584 WantedBy=multi-user.target
 585 EOF
 586
 587 i /etc/systemd/system/mailbindwatchdog.service <<EOF
 588 [Unit]
 589 Description=Watchdog to restart services relying on systemd-resolved dir
 590 After=syslog.target network-online.target
 591 Wants=network-online.target
 592 BindsTo=mailnn.service
 593
 594 [Service]
 595 Type=simple
 596 ExecStart=/usr/local/bin/mailbindwatchdog $vpnser ${nn_progs[@]} unbound.service radicale.service
 597 Restart=always
 598 # time to sleep before restarting a service
 599 RestartSec=10
 600
 601 [Install]
 602 WantedBy=multi-user.target
 603 EOF
 604
 605
 606
 607 # old service name
 608 rm -fv /etc/systemd/system/openvpn-client-mail@.service
 609
 610 # We use a local unbound because systemd-resolved wont accept our
 611 # request, it will only listen to 127.0.0.53 in the main network
 612 # namespace, and rejected feature requests to change that (although I
 613 # could change the code and recompile), but anyways, that could answer
 614 # with things specific to the lan that aren't applicable in this
 615 # namespace, and since unbound is a recursive resolver, it means we just
 616 # use our own ip against dnsbl rate limits.
 617 #
 618 # If we ever notice this change, chattr +i on it
 619 # trust-ad is used in t10+, glibc 2.31
 620
 621 i /etc/127.0.0.1-resolv/stub-resolv.conf <<'EOF'
 622 nameserver 127.0.0.1
 623 options edns0 trust-ad
 624 EOF
 625
 626 i /etc/127.0.0.53-resolv/stub-resolv.conf <<'EOF'
 627 nameserver 127.0.0.53
 628 options edns0 trust-ad
 629 EOF
 630
 631
 632 i /etc/10.173.8.1-resolv/stub-resolv.conf <<'EOF'
 633 nameserver 10.173.8.1
 634 options edns0 trust-ad
 635 EOF
 636
 637 # this is just a bug fix for trisquel.
 638 f=/etc/apparmor.d/usr.sbin.unbound
 639 line="/usr/sbin/unbound flags=(attach_disconnected) {"
 640 if ! grep -qFx "$line" $f; then
 641   badline="/usr/sbin/unbound {"
 642   if ! grep -qFx "$badline" $f; then
 643     err expected line in $f not found
 644   fi
 645   sed -i "s,^$badline$,$line," $f
 646   if systemctl is-active apparmor &>/dev/null; then
 647     m systemctl reload apparmor
 648   fi
 649 fi
 650
 651 # note: anything added to nn_progs needs corresponding rm
 652 # down below in the host switch
 653 nn_progs=(exim4)
 654 if mailhost; then
 655   # Note dovecots lmtp doesnt need to be in the same nn to accept delivery.
 656   # Its in the nn so remote clients can connect to it.
 657   nn_progs+=(spamassassin dovecot)
 658 fi
 659
 660 case $HOSTNAME in
 661   $MAIL_HOST)
 662     i /etc/systemd/system/unbound.service.d/nn.conf <<EOF
 663 [Unit]
 664 After=mailnn.service
 665 JoinsNamespaceOf=mailnn.service
 666 BindsTo=mailnn.service
 667 StartLimitIntervalSec=0
 668
 669 [Service]
 670 PrivateNetwork=true
 671 # note the nsswitch bind is actually not needed for bk, but
 672 # its the same file so it does no harm.
 673 BindPaths=$bindpaths
 674
 675 Restart=always
 676 RestartSec=20
 677 EOF
 678
 679     # sooo, there are a few ways to get traffic from the mail network
 680     # namespace to go over the wghole.
 681     #
 682     #1: unify the mail vpn and wghole
 683     # into 1 network.  this seems simple and logical, so I'm doing it.
 684     # One general downside is tying things together, if I need to mess
 685     # with one thing, it breaks the other. Oh well for now.
 686     #
 687     # 2. We can route 10.5.3.0/24 out of the mail nn and nat it into wghole.
 688     #
 689     # 3. We can setup the routing to happen on li, which seemed like I
 690     # just needed to add 10.8.0.4/24 to AllowedIPs in at least the
 691     # wghole clients, but I think that is kind of hacky and breaks ipv4
 692     # routing within the mailvpn, it happened to work just because exim
 693     # prefers ipv6 and that was also available in the mailvpn.
 694     #
 695     # 4. Put the hole interface into the mail network namespace. This
 696     # doesn't work if the mail vpn is wg.  For openvpn, it bypasses the
 697     # vpn routing and establishes a direct connection.  I only use the
 698     # hole vpn for randomish things, it should be fine to join the mail
 699     # nn for that. There should be some way to fix the routing issue
 700     # by doing manual routing, but that doesn't seem like a good use of time.
 701     # relevant:
 702     # https://www.wireguard.com/netns/#
 703     #
 704     # for wireguard debugging
 705     # echo module wireguard +p > /sys/kernel/debug/dynamic_debug/control
 706     # dmesg -w
 707
 708     ;;&
 709   $MAIL_HOST|bk)
 710     for unit in ${nn_progs[@]}; do
 711       i /etc/systemd/system/$unit.service.d/nn.conf <<EOF
 712 [Unit]
 713 # commented for old openvpn
 714 Requires=$vpnser
 715 After=network.target mailnn.service $vpnser
 716 JoinsNamespaceOf=mailnn.service
 717 BindsTo=mailnn.service
 718 StartLimitIntervalSec=0
 719
 720 [Service]
 721 PrivateNetwork=true
 722 # note the nsswitch bind is actually not needed for bk, but
 723 # its the same file so it does no harm.
 724 BindPaths=$bindpaths
 725
 726 Restart=always
 727 RestartSec=20
 728 EOF
 729     done
 730     ;;
 731   *)
 732     for unit in exim4 spamassassin dovecot unbound; do
 733       f=/etc/systemd/system/$unit.service.d/nn.conf
 734       if [[ -s $f ]]; then
 735         rm -fv $f
 736         reload=true
 737       fi
 738     done
 739     ;;
 740 esac
 741
 742 # * spamassassin config
 743 i /etc/sysctl.d/80-iank-mail.conf <<'EOF'
 744 # see exim spec
 745 net.netfilter.nf_conntrack_tcp_timeout_close_wait = 120
 746 EOF
 747 if $ir; then
 748   m sysctl -p
 749 fi
 750
 751 i /etc/spamassassin/mylocal.cf <<'EOF'
 752 # this is mylocal.cf because the normal local.cf has a bunch of upstream stuff i dont want to mess with
 753
 754 # /usr/share/doc/exim4-base/README.Debian.gz:
 755 #   SpamAssassin's default report should not be used in a add_header
 756 #   statement since it contains empty lines. (This triggers e.g. Amavis'
 757 #   warning "BAD HEADER SECTION, Improper folded header field made up
 758 #   entirely of whitespace".) This is a safe, terse alternative:
 759 clear_report_template
 760 report (_SCORE_ / _REQD_ requ) _TESTSSCORES(,)_ autolearn=_AUTOLEARN
 761 uridnsbl_skip_domain iankelling.org
 762 uridnsbl_skip_domain amnimal.ninja
 763 uridnsbl_skip_domain expertpathologyreview.com
 764 uridnsbl_skip_domain zroe.org
 765 EOF
 766
 767 # 2020-10-19 remove old file. remove this when all hosts updated
 768 rm -fv /etc/systemd/system/spamddnsfix.{timer,service}
 769
 770 i /etc/default/spamassassin <<'EOF'
 771 # defaults plus debugging flags for an issue im having
 772 OPTIONS="--create-prefs --max-children 5 --helper-home-dir"
 773 PIDFILE="/var/run/spamd.pid"
 774 # my additions
 775 NICE="--nicelevel 15"
 776 CRON=1
 777 EOF
 778 #####   end spamassassin config
 779
 780
 781 # * Update mail cert
 782 if [[ -e /p/c/filesystem ]]; then
 783   # note, man openvpn implies we could just call mail-route on vpn startup/shutdown with
 784   # systemd, buuut it can remake the tun device unexpectedly, i got this in the log
 785   # after my internet was down for a bit:
 786   # NOTE: Pulled options changed on restart, will need to close and reopen TUN/TAP device.
 787   m /a/exe/vpn-mk-client-cert -b mailclient -n mail li.iankelling.org
 788 fi
 789 case $HOSTNAME in
 790   bk)
 791     if [[ ! -e /etc/openvpn/client/mail.conf ]]; then
 792       echo "$0: error: first, on a system with /p/c/filesystem, run mail-setup, or the vpn-mk-client-cert line above this err" 2>&2
 793       exit 1
 794     fi
 795     ;;
 796 esac
 797
 798 m rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/mail-cert-cron /usr/local/bin
 799
 800 i /etc/systemd/system/mailcert.service <<'EOF'
 801 [Unit]
 802 Description=Mail cert rsync
 803 After=multi-user.target
 804
 805 [Service]
 806 Type=oneshot
 807 ExecStart=/usr/local/bin/sysd-mail-once mailcert /usr/local/bin/mail-cert-cron
 808 EOF
 809 i /etc/systemd/system/mailcert.timer <<'EOF'
 810 [Unit]
 811 Description=Run mail-cert once a day
 812
 813 [Timer]
 814 OnCalendar=daily
 815
 816 [Install]
 817 WantedBy=timers.target
 818 EOF
 819
 820
 821 wghost=${HOSTNAME}wg.b8.nz
 822 if $bhost_t && [[ ! -e /etc/exim4/certs/$wghost/privkey.pem ]]; then
 823   certbot -n --manual-public-ip-logging-ok --eff-email --agree-tos -m letsencrypt@iankelling.org \
 824           certonly --manual --preferred-challenges=dns \
 825           --manual-auth-hook /a/bin/ds/le-dns-challenge \
 826           --manual-cleanup-hook /a/bin/ds/le-dns-challenge-cleanup \
 827           --deploy-hook /a/bin/ds/le-exim-deploy -d $wghost
 828 fi
 829
 830 # * fail2ban
 831
 832 # todo: test that these configs actually work, eg run
 833 # s iptables-exim -S
 834 # and see someone is banned.
 835
 836 sed 's/^ *before *= *iptables-common.conf/before = iptables-common-exim.conf/' \
 837     /etc/fail2ban/action.d/iptables-multiport.conf| i /etc/fail2ban/action.d/iptables-exim.conf
 838 i /etc/fail2ban/action.d/iptables-common-exim.conf <<'EOF'
 839 # iank: same as iptables-common, except iptables is iptables-exim, ip6tables is ip6tables-exim
 840
 841 # Fail2Ban configuration file
 842 #
 843 # Author: Daniel Black
 844 #
 845 # This is a included configuration file and includes the definitions for the iptables
 846 # used in all iptables based actions by default.
 847 #
 848 # The user can override the defaults in iptables-common.local
 849 #
 850 # Modified: Alexander Koeppe <format_c@online.de>, Serg G. Brester <serg.brester@sebres.de>
 851 #       made config file IPv6 capable (see new section Init?family=inet6)
 852
 853 [INCLUDES]
 854
 855 after = iptables-blocktype.local
 856         iptables-common.local
 857 # iptables-blocktype.local is obsolete
 858
 859 [Definition]
 860
 861 # Option:  actionflush
 862 # Notes.:  command executed once to flush IPS, by shutdown (resp. by stop of the jail or this action)
 863 # Values:  CMD
 864 #
 865 actionflush = <iptables> -F f2b-<name>
 866
 867
 868 [Init]
 869
 870 # Option:  chain
 871 # Notes    specifies the iptables chain to which the Fail2Ban rules should be
 872 #          added
 873 # Values:  STRING  Default: INPUT
 874 chain = INPUT
 875
 876 # Default name of the chain
 877 #
 878 name = default
 879
 880 # Option:  port
 881 # Notes.:  specifies port to monitor
 882 # Values:  [ NUM | STRING ]  Default:
 883 #
 884 port = ssh
 885
 886 # Option:  protocol
 887 # Notes.:  internally used by config reader for interpolations.
 888 # Values:  [ tcp | udp | icmp | all ] Default: tcp
 889 #
 890 protocol = tcp
 891
 892 # Option:  blocktype
 893 # Note:    This is what the action does with rules. This can be any jump target
 894 #          as per the iptables man page (section 8). Common values are DROP
 895 #          REJECT, REJECT --reject-with icmp-port-unreachable
 896 # Values:  STRING
 897 blocktype = REJECT --reject-with icmp-port-unreachable
 898
 899 # Option:  returntype
 900 # Note:    This is the default rule on "actionstart". This should be RETURN
 901 #          in all (blocking) actions, except REJECT in allowing actions.
 902 # Values:  STRING
 903 returntype = RETURN
 904
 905 # Option:  lockingopt
 906 # Notes.:  Option was introduced to iptables to prevent multiple instances from
 907 #          running concurrently and causing irratic behavior.  -w was introduced
 908 #          in iptables 1.4.20, so might be absent on older systems
 909 #          See https://github.com/fail2ban/fail2ban/issues/1122
 910 # Values:  STRING
 911 lockingopt = -w
 912
 913 # Option:  iptables
 914 # Notes.:  Actual command to be executed, including common to all calls options
 915 # Values:  STRING
 916 iptables = /usr/local/bin/iptables-exim <lockingopt>
 917
 918
 919 [Init?family=inet6]
 920
 921 # Option:  blocktype (ipv6)
 922 # Note:    This is what the action does with rules. This can be any jump target
 923 #          as per the iptables man page (section 8). Common values are DROP
 924 #          REJECT, REJECT --reject-with icmp6-port-unreachable
 925 # Values:  STRING
 926 blocktype = REJECT --reject-with icmp6-port-unreachable
 927
 928 # Option:  iptables (ipv6)
 929 # Notes.:  Actual command to be executed, including common to all calls options
 930 # Values:  STRING
 931 iptables = /usr/local/bin/ip6tables-exim <lockingopt>
 932 EOF
 933
 934 i /etc/fail2ban/jail.d/exim.local <<'EOF'
 935 [exim]
 936 enabled  = true
 937 port     = 25,587
 938 filter   = exim
 939 banaction = iptables-exim
 940 EOF
 941 if $ir; then
 942   m systemctl restart fail2ban
 943 fi
 944
 945 # * common exim4 config
 946
 947
 948 ## old, not using forward files anymore
 949 rm -fv $uhome/.forward /root/.forward
 950
 951
 952 # Make all system users be aliases. preventative
 953 # prevents things like cron mail for user without alias
 954 awk 'BEGIN { FS = ":" } ; $6 !~ /^\/home/ || $7 ~ /\/nologin$/  { print $1 }' /etc/passwd| while read -r user; do
 955   if [[ ! $user ]]; then
 956     continue
 957   fi
 958   if ! grep -q "^$user:" /etc/aliases; then
 959     echo "$user: root" |m tee -a /etc/aliases
 960   fi
 961 done
 962
 963
 964 awk 'BEGIN { FS = ":" } ; $6 ~ /^\/home/ && $7 !~ /\/nologin$/ { print $1 }' /etc/passwd| while read -r user; do
 965   case $HOSTNAME in
 966     $MAIL_HOST)
 967       sed -i "/^user:/d" /etc/aliases
 968       ;;
 969     *)
 970       if ! grep -q "^$user:" /etc/aliases; then
 971         echo "$user: root" |m tee -a /etc/aliases
 972       fi
 973       ;;
 974   esac
 975 done
 976
 977 if ! grep -q "^ncsoft:" /etc/aliases; then
 978   echo "ncsoft: graceq2323@gmail.com" |m tee -a /etc/aliases
 979 fi
 980
 981
 982
 983 m gpasswd -a iank adm #needed for reading logs
 984
 985 ### make local bounces go to normal maildir
 986 # local mail that bounces goes to /Maildir or /root/Maildir
 987 dirs=(/m/md/bounces/{cur,tmp,new})
 988 m mkdir -p ${dirs[@]}
 989 m chown iank:iank /m /m/md
 990 m ln -sfT /m/md /m/iank
 991 m chmod 771 /m /m/md
 992 m chown -R $u:Debian-exim /m/md/bounces
 993 m chmod 775 ${dirs[@]}
 994 m usermod -a -G Debian-exim $u
 995 for d in /Maildir /root/Maildir; do
 996   if [[ ! -L $d ]]; then
 997     m rm -rf $d
 998   fi
 999   m ln -sf -T /m/md/bounces $d
1000 done
1001
1002 # dkim, client passwd file
1003 files=(/p/c/machine_specific/$HOSTNAME/filesystem/etc/exim4/*)
1004 f=/p/c/filesystem/etc/exim4/passwd.client
1005 if [[ -e $f ]]; then
1006   files+=($f)
1007 fi
1008 if (( ${#files[@]} )); then
1009   m rsync -ahhi --chown=root:Debian-exim --chmod=0640 \
1010     ${files[@]} /etc/exim4
1011 fi
1012
1013 # By default, only 10 days of logs are kept. increase that.
1014 # And dont compress, I look back at logs too often and
1015 # dont need the annoyance of decompressing them all the time.
1016 m sed -ri '/^\s*compress\s*$/d;s/^(\s*rotate\s).*/\11000/' /etc/logrotate.d/exim4-base
1017 files=(/var/log/exim4/*.gz)
1018 if (( ${#files[@]} )); then
1019   gunzip ${files[@]}
1020 fi
1021
1022 ## disabled. not using .forward files, but this is still interesting
1023 ## for reference.
1024 # ## https://blog.dhampir.no/content/make-exim4-on-debian-respect-forward-and-etcaliases-when-using-a-smarthost
1025 # # i only need .forwards, so just doing that one.
1026 # cd /etc/exim4/conf.d/router
1027 # b=userforward_higher_priority
1028 # # replace the router name so it is unique
1029 # sed -r s/^\\S+:/$b:/ 600_exim4-config_userforward >175_$b
1030 rm -fv /etc/exim4/conf.d/router/175_userforward_higher_priority
1031
1032 # todo, consider 'separate' in etc/exim4.conf, could it help on busy systems?
1033
1034 # alerts is basically the postmaster address
1035 m sed -i --follow-symlinks -f - /etc/aliases <<EOF
1036 \$a root: alerts@iankelling.org
1037 /^root:/d
1038 EOF
1039
1040 cat >/etc/exim4/conf.d/rewrite/34_iank_rewriting <<'EOF'
1041 ncsoft@zroe.org graceq2323@gmail.com hE
1042 EOF
1043
1044 # old name
1045 rm -fv /etc/exim4/conf.d/retry/37_retry
1046
1047 cat >/etc/exim4/conf.d/retry/17_retry <<'EOF'
1048 # Retry fast for my own domains
1049 iankelling.org * F,1d,10m;F,14d,1h
1050 amnimal.ninja * F,1d,10m;F,14d,1h
1051 expertpathologyreview.com * F,1d,10m;F,14d,1h
1052 je.b8.nz * F,1d,10m;F,14d,1h
1053 zroe.org * F,1d,10m;F,14d,1h
1054 eximbackup.b8.nz * F,1d,4m;F,14d,1h
1055 EOF
1056
1057
1058 rm -vf /etc/exim4/conf.d/main/000_localmacros # old filename
1059
1060 # separate file so without quoted EOF for convenience
1061 cat >/etc/exim4/conf.d/main/000_local2 <<EOF
1062 # normally empty, I set this so I can set the envelope address
1063 # when doing mail redelivery to invoke filters. Also allows
1064 # me exiqgrep and stuff.
1065 MAIN_TRUSTED_GROUPS = $u
1066 EOF
1067
1068 cat >/etc/exim4/conf.d/main/000_local <<'EOF'
1069 MAIN_TLS_ENABLE = true
1070
1071 # require tls connections for all smarthosts
1072 REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS = *
1073
1074 # debian exim config added this in 2016 or so?
1075 # it's part of the smtp spec, to limit lines to 998 chars
1076 # but a fair amount of legit mail does not adhere to it. I don't think
1077 # this should be default, like it says in
1078 # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=828801
1079 # todo: the bug for introducing this was about headers, but
1080 # the fix maybe is for all lines? one says gmail rejects, the
1081 # other says gmail does not reject. figure out and open a new bug.
1082 IGNORE_SMTP_LINE_LENGTH_LIMIT = true
1083
1084 # more verbose logs
1085 MAIN_LOG_SELECTOR = +all
1086
1087 # Based on spec, seems like a good idea to be nice.
1088 smtp_return_error_details = true
1089
1090 # default is 10. when exim has been down for a bit, fsf mailserver
1091 # will do a big send in one connection, then exim decides to put
1092 # the messages in the queue instead of delivering them, to avoid
1093 # spawning too many delivery processes. This is the same as the
1094 # fsfs value. And the corresponding one for how many messages
1095 # to send out in 1 connection remote_max_parallel = 256
1096 smtp_accept_queue_per_connection = 500
1097
1098
1099 DKIM_CANON = relaxed
1100 DKIM_SELECTOR = li
1101
1102 # from comments in
1103 # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
1104 # and its best for this to align https://tools.ietf.org/html/rfc7489#page-8
1105 # There could be some circumstance when the
1106 # from: isnt our domain, but the envelope sender is
1107 # and so still want to sign, but I cant think of any case.
1108 DKIM_DOMAIN = ${lc:${domain:$rh_from:}}
1109 # The file is based on the outgoing domain-name in the from-header.
1110 # sign if key exists
1111 DKIM_PRIVATE_KEY = ${if exists{/etc/exim4/${dkim_domain}-private.pem} {/etc/exim4/${dkim_domain}-private.pem}}
1112
1113 # most of the ones that gmail seems to use.
1114 # Exim has horrible default of signing unincluded
1115 # list- headers since they got mentioned in an
1116 # rfc, but this messes up mailing lists, like gnu/debian which want to
1117 # keep your dkim signature intact but add list- headers.
1118 DKIM_SIGN_HEADERS = mime-version:in-reply-to:references:from:date:subject:to
1119
1120 domainlist local_hostnames = ! je.b8.nz : ! bk.b8.nz : *.b8.nz : b8.nz
1121
1122 hostlist iank_trusted = <; \\
1123 # veth0
1124 10.173.8.1 ; \\
1125 # li li_ip6
1126 72.14.176.105 ; 2600:3c00::f03c:91ff:fe6d:baf8 ; \\
1127 # li_vpn_net li_vpn_net_ip6s
1128 10.8.0.0/24; 2600:3c00:e000:280::/64 ; 2600:3c00:e002:3800::/56 ;  \\
1129 # bk bk_ip6
1130 85.119.83.50 ; 2001:ba8:1f1:f0c9::2 ; \\
1131 # je je_ipv6
1132 85.119.82.128 ; 2001:ba8:1f1:f09d::2 ; \\
1133 # fsf_mit_net fsf_mit_net_ip6 fsf_net fsf_net_ip6 fsf_office_net
1134 18.4.89.0/24 ; 2603:3005:71a:2e00::/64 ; 209.51.188.0/24 ; 2001:470:142::/48 ; 74.94.156.208/28
1135
1136
1137 # this is the default delay_warning_condition, plus matching on local_domains.
1138 # If I have some problem with my local system that causes delayed delivery,
1139 # I dont want to send warnings out to non-local domains.
1140 delay_warning_condition = ${if or {\
1141   { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} }\
1142   { match{$h_precedence:}{(?i)bulk|list|junk} }\
1143   { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} }\
1144   { match_domain{$domain}{+local_domains} }\
1145   } {no}{yes}}
1146
1147
1148 EOF
1149
1150 rm -fv /etc/exim4/rcpt_local_acl # old path
1151
1152 i /etc/exim4/conf.d/local_deny_exceptions_acl <<'EOF'
1153 # This acl already exists in rcpt, this just makes it more widespread.
1154 # See the comment there for its rationale. The reason it needs to be
1155 # more widespread is that I've turned on sender verification, but cron
1156 # emails can fail sender verification since I may be in a network that
1157 # doesn't have my local dns.
1158 accept
1159   authenticated = *
1160
1161 # i setup a local programs smtp to mail.iankelling.org, this
1162 # skips sender verification for it.
1163 accept
1164   hosts = 10.173.8.1
1165 EOF
1166
1167 rm -fv /etc/exim4/data_local_acl # old path
1168 i /etc/exim4/conf.d/data_local_acl <<'EOF'
1169 # Except for the "condition =", this was
1170 # a comment in the check_data acl. The comment about this not
1171 # being suitable has been changed in newer exim versions. The only thing
1172 # related I found was to
1173 # add the condition =, cuz spamassassin has problems with big
1174 # messages and spammers don't bother with big messages,
1175 # but I've increased the size from 10k
1176 # suggested in official docs, and 100k in the wiki example because
1177 # those docs are rather old and I see a 110k spam message
1178 # pretty quickly looking through my spam folder.
1179
1180 warn
1181   !hosts = +iank_trusted
1182   remove_header = X-Spam_score: X-Spam_score_int : X-Spam_bar : X-Spam_report
1183
1184 warn
1185   !hosts = +iank_trusted
1186   condition = ${if < {$message_size}{5000K}}
1187   spam = Debian-exim:true
1188   add_header = X-Spam_score_int: $spam_score_int
1189   add_header = X-Spam_score: $spam_score
1190   add_header = X-Spam_bar: $spam_bar
1191   add_header = X-Spam_report: $spam_report
1192   add_header = X-Spam_action: $spam_action
1193
1194 warn
1195   condition = ${if def:malware_name}
1196   remove_header = Subject:
1197   add_header = Subject: [Clamav warning: $malware_name] $h_subject
1198   log_message = heuristic malware warning: $malware_name
1199
1200 #accept
1201 #  spf = pass:fail:softfail:none:neutral:permerror:temperror
1202 #  dmarc_status = reject:quarantine
1203 #  add_header = Reply-to: dmarctest@iankelling.org
1204
1205 EOF
1206
1207 i /etc/exim4/conf.d/router/900_exim4-config_local_user <<'EOF'
1208 ### router/900_exim4-config_local_user
1209 #################################
1210
1211 # This router matches local user mailboxes. If the router fails, the error
1212 # message is "Unknown user".
1213 local_user:
1214   debug_print = "R: local_user for $local_part@$domain"
1215   driver = accept
1216   domains = +local_domains
1217 # ian: default file except where mentioned.
1218 # ian: commented this. I get all local parts. for bk, an rcpt
1219 # check handles checking with dovecot, and the only router
1220 # after this is root.
1221 #  local_parts = ! root
1222   transport = LOCAL_DELIVERY
1223   cannot_route_message = Unknown user
1224 # ian: added for + addressing.
1225   local_part_suffix = +*
1226   local_part_suffix_optional
1227 EOF
1228 i /etc/exim4/conf.d/transport/30_exim4-config_dovecot_lmtp <<'EOF'
1229 dovecot_lmtp:
1230   driver = lmtp
1231   socket = /var/run/dovecot/lmtp
1232   #maximum number of deliveries per batch, default 1
1233   batch_max = 200
1234   envelope_to_add
1235 EOF
1236
1237 i /etc/exim4/conf.d/transport/30_remote_smtp_vpn <<'EOF'
1238 # same as debians 30_exim4-config_remote_smtp, but
1239 # with interface added at the end.
1240
1241 remote_smtp_vpn:
1242   debug_print = "T: remote_smtp_vpn for $local_part@$domain"
1243   driver = smtp
1244 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
1245   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
1246 .endif
1247 .ifdef REMOTE_SMTP_HOSTS_AVOID_TLS
1248   hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
1249 .endif
1250 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1251   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1252 .endif
1253 .ifdef REMOTE_SMTP_RETURN_PATH
1254   return_path = REMOTE_SMTP_RETURN_PATH
1255 .endif
1256 .ifdef REMOTE_SMTP_HELO_DATA
1257   helo_data=REMOTE_SMTP_HELO_DATA
1258 .endif
1259 .ifdef DKIM_DOMAIN
1260 dkim_domain = DKIM_DOMAIN
1261 .endif
1262 .ifdef DKIM_SELECTOR
1263 dkim_selector = DKIM_SELECTOR
1264 .endif
1265 .ifdef DKIM_PRIVATE_KEY
1266 dkim_private_key = DKIM_PRIVATE_KEY
1267 .endif
1268 .ifdef DKIM_CANON
1269 dkim_canon = DKIM_CANON
1270 .endif
1271 .ifdef DKIM_STRICT
1272 dkim_strict = DKIM_STRICT
1273 .endif
1274 .ifdef DKIM_SIGN_HEADERS
1275 dkim_sign_headers = DKIM_SIGN_HEADERS
1276 .endif
1277 .ifdef TLS_DH_MIN_BITS
1278 tls_dh_min_bits = TLS_DH_MIN_BITS
1279 .endif
1280 .ifdef REMOTE_SMTP_TLS_CERTIFICATE
1281 tls_certificate = REMOTE_SMTP_TLS_CERTIFICATE
1282 .endif
1283 .ifdef REMOTE_SMTP_PRIVATEKEY
1284 tls_privatekey = REMOTE_SMTP_PRIVATEKEY
1285 .endif
1286 .ifdef REMOTE_SMTP_HOSTS_REQUIRE_TLS
1287   hosts_require_tls = REMOTE_SMTP_HOSTS_REQUIRE_TLS
1288 .endif
1289 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1290   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1291 .endif
1292   interface = <; 10.8.0.4 ; 2600:3c00:e002:3800::4
1293 EOF
1294
1295 i /etc/exim4/conf.d/transport/30_smarthost_dkim <<'EOF'
1296 # ian: this is remote_smtp_smarthost plus the dkim parts from remote_smtp
1297
1298 smarthost_dkim:
1299   debug_print = "T: remote_smtp_smarthost for $local_part@$domain"
1300   driver = smtp
1301   multi_domain
1302 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
1303   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
1304 .endif
1305   hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \
1306         {\
1307         ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\
1308         }\
1309         {} \
1310       }
1311 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1312   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1313 .endif
1314 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1315   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1316 .endif
1317 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1318   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1319 .endif
1320 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1321   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
1322 .endif
1323 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1324   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1325 .endif
1326 .ifdef REMOTE_SMTP_RETURN_PATH
1327   return_path = REMOTE_SMTP_RETURN_PATH
1328 .endif
1329 .ifdef REMOTE_SMTP_HELO_DATA
1330   helo_data=REMOTE_SMTP_HELO_DATA
1331 .endif
1332 .ifdef TLS_DH_MIN_BITS
1333 tls_dh_min_bits = TLS_DH_MIN_BITS
1334 .endif
1335 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1336 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1337 .endif
1338 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1339 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1340 .endif
1341 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1342   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1343 .endif
1344 .ifdef DKIM_DOMAIN
1345 dkim_domain = DKIM_DOMAIN
1346 .endif
1347 .ifdef DKIM_SELECTOR
1348 dkim_selector = DKIM_SELECTOR
1349 .endif
1350 .ifdef DKIM_PRIVATE_KEY
1351 dkim_private_key = DKIM_PRIVATE_KEY
1352 .endif
1353 .ifdef DKIM_CANON
1354 dkim_canon = DKIM_CANON
1355 .endif
1356 .ifdef DKIM_STRICT
1357 dkim_strict = DKIM_STRICT
1358 .endif
1359 .ifdef DKIM_SIGN_HEADERS
1360 dkim_sign_headers = DKIM_SIGN_HEADERS
1361 .endif
1362 EOF
1363
1364
1365 cat >/etc/exim4/update-exim4.conf.conf  <<'EOF'
1366 # default stuff, i havent checked if its needed
1367 dc_minimaldns='false'
1368 dc_relay_nets=''
1369 CFILEMODE='644'
1370 dc_use_split_config='true'
1371 dc_mailname_in_oh='true'
1372 EOF
1373
1374
1375 # * radicale
1376 if mailhost; then
1377   if ! mountpoint /o; then
1378     echo "error /o is not a mountpoint" >&2
1379     exit 1
1380   fi
1381
1382   # davx/davdroid setup instructions at the bottom
1383
1384   # main docs:
1385   # http://radicale.org/user_documentation/
1386   # https://davdroid.bitfire.at/configuration/
1387
1388   # note on debugging: if radicale can't bind to the address,
1389   # in the log it just says "Starting Radicale". If you run
1390   # it in the foreground, it will give more info. Background
1391   # plus debug does not help.
1392   # sudo -u radicale radicale -D -f
1393
1394   # created password file with:
1395   # htpasswd -c /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1396   # chmod 640 /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1397   # # setup chgrp www-data in ./conflink
1398
1399   pi-nostart radicale
1400
1401   i /etc/systemd/system/radicale.service.d/override.conf <<EOF
1402 [Unit]
1403 # this unit is configured to start and stop whenever
1404 # $vpnser does
1405
1406 After=network.target network-online.target mailnn.service $vpnser
1407 BindsTo=$vpnser
1408
1409 Wants=network-online.target
1410 JoinsNamespaceOf=mailnn.service
1411 StartLimitIntervalSec=0
1412
1413 [Service]
1414 PrivateNetwork=true
1415 BindPaths=$bindpaths
1416 Restart=always
1417 # time to sleep before restarting a service
1418 RestartSec=20
1419
1420 [Install]
1421 # for openvpn
1422 RequiredBy=$vpnser
1423 EOF
1424
1425
1426   # use persistent uid/gid
1427   IFS=:; read -r _ _ uid _ < <(getent passwd radicale ); unset IFS
1428   IFS=:; read -r _ _ gid _ < <(getent group radicale ); unset IFS
1429   if [[ $uid != 609 ]]; then
1430     m systemctl stop radicale ||:
1431     m usermod -u 609 radicale
1432     m groupmod -g 609 radicale
1433     m usermod -g 609 radicale
1434   fi
1435   m find /o/radicale  -xdev -exec chown -h 609 {} +
1436   m find /o/radicale -xdev -exec chgrp -h 609 {} +
1437
1438
1439   # I moved /var/lib/radicale after it's initialization.
1440   # I did a sudo -u radicale git init in the collections subfolder
1441   # after it gets created, per the git docs.
1442   m /a/exe/lnf -T /o/radicale /var/lib/radicale
1443
1444   # from https://www.williamjbowman.com/blog/2015/07/24/setting-up-webdav-caldav-and-carddav-servers/
1445
1446   # more config is for li in distro-end
1447
1448   # coment in this file says this is needed for it to run on startup
1449   sed -ri 's/^\s*#+\s*(ENABLE_RADICALE\s*=\s*yes\s*)/\1/' /etc/default/radicale
1450
1451   # comments say default is 0.0.0.0:5232
1452   m setini hosts 10.8.0.4:5232 server
1453   # https://radicale.org/2.1.html
1454   m setini type http_x_remote_user auth
1455
1456
1457   # disable power management feature, set to 240 min sync interval,
1458   # so it shouldn't be bad.
1459
1460   # davdroid from f-druid.
1461   # login with url and user name
1462   # url https://cal.iankelling.org/ian
1463   # username ian
1464   # pass, see password manager for radicale
1465   #
1466   # add account dialog:
1467   #
1468   # set account name as ian@iankelling.org, per help text below the
1469   # field.
1470   #
1471   # switch to groups are per-contact categories,
1472   # per https://davdroid.bitfire.at/configuration/radicale/
1473   #
1474   #
1475   # After setting up account, I added one address book, named
1476   # ianaddr. calender was already created, named ian. checked boxes under
1477   # both. synced.
1478   #
1479   # To restore from old phone to new phone, I wiped all data out, then copied over the newly created files. I think
1480   #
1481   # ignorable background info:
1482   #
1483   # opentasks uses the calendar file.
1484   #
1485   # The address book I created got a uuid as a name for the file. Note
1486   # the .props file says if it's a calendar or addressbook.
1487   #
1488   # When debugging, tailed /var/log/radicale/radicale.log and apache log,
1489   # both show the requests happening. Without creating the address book,
1490   # after creating a contact, a sync would delete it.
1491   #
1492   # Address books correspond to .props files in the radicale dir.
1493   #
1494   #  Some background is here,
1495   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1496   # which shows separate vcard option is from rfc 6350, the other is 2426,
1497   # radicale page says it implements the former not the latter,
1498   # which conflicts with the documentation of which to select, but whatever.
1499   # http://radicale.org/technical_choices/
1500   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1501   #
1502   # Note, url above says only cayanogenmod 13+ and omnirom can manage groups.
1503
1504   # Note, radicale had built-in git support to track changes, but they
1505   # removed it in 2.0.
1506
1507 fi
1508
1509 # * dovecot
1510
1511 # ** $MAIL_HOST|bk|je)
1512 case $HOSTNAME in
1513   $MAIL_HOST|bk|je)
1514     # based on a little google and package search, just the dovecot
1515     # packages we need instead of dovecot-common.
1516     #
1517     # dovecot-lmtpd is for exim to deliver to dovecot instead of maildir
1518     # directly.  The reason to do this is to use dovecot\'s sieve, which
1519     # can generally do more than exims filters (a few things less) and
1520     # sieve has the benefit of being supported in postfix and
1521     # proprietary/weird environments, so there is more examples on the
1522     # internet.
1523     pi dovecot-core dovecot-imapd dovecot-sieve dovecot-lmtpd dovecot-sqlite sqlite3
1524
1525     for f in /p/c{/machine_specific/$HOSTNAME,}/filesystem/etc/dovecot/users; do
1526       if [[ -e $f ]]; then
1527         m rsync -ahhi --chown=root:dovecot --chmod=0640 $f /etc/dovecot/
1528         break
1529       fi
1530     done
1531     for f in /p/c/subdir_files/sieve/*sieve /a/bin/ds/subdir_files/sieve/*sieve; do
1532       m sudo -u $u /a/exe/lnf -v -T $f $uhome/sieve/${f##*/}
1533     done
1534
1535     # https://wiki.dovecot.org/SSL/DovecotConfiguration
1536     i /etc/dovecot/dhparam <<'EOF'
1537 -----BEGIN DH PARAMETERS-----
1538 MIIBCAKCAQEAoleil6SBxGqQKk7j0y2vV3Oklv6XupZKn7PkPv485QuFeFagifeS
1539 A+Jz6Wquqk5zhGyCu63Hp4wzGs4TyQqoLjkaWL6Ra/Bw3g3ofPEzMGEsV1Qdqde4
1540 jorwiwtr2i9E6TXQp0noT/7VFeHulIkayTeW8JulINdMHs+oLylv16McGCIrxbkM
1541 8D1PuO0TP/CNDs2QbRvJ1RjY3CeGpxMhrSHVgBCUMwnA2cvz3bYjI7UMYMMDPNrE
1542 PLrwsYzXGGCdJsO2vsmmqqgLsZiapYJlUNjfiyWLt7E2H6WzkNB3VIhIPfLqFDPK
1543 xioE3sYKdjOt+p6mlg3l8+OLtODEFPHDqwIBAg==
1544 -----END DH PARAMETERS-----
1545 EOF
1546     {
1547       if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
1548         cat <<'EOF'
1549 ssl_cert = </etc/exim4/fullchain.pem
1550 ssl_key = </etc/exim4/privkey.pem
1551 EOF
1552       else
1553         cat <<'EOF'
1554 ssl_cert = </etc/exim4/exim.crt
1555 ssl_key = </etc/exim4/exim.key
1556 EOF
1557       fi
1558       cat <<'EOF'
1559 # https://ssl-config.mozilla.org
1560 ssl = required
1561 # this is the same as the certbot list, in my cert cronjob, I check if that has changed upstream.
1562 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
1563 ssl_protocols = TLSv1.2
1564 ssl_prefer_server_ciphers = no
1565
1566 protocol lmtp {
1567 #per https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
1568 # default is just $mail_plugins
1569   mail_plugins = $mail_plugins sieve
1570 }
1571 EOF
1572       if dpkg --compare-versions $(dpkg-query -f='${Version}\n' --show dovecot-core) ge 1:2.3; then
1573         cat <<EOF
1574 ssl_dh = </etc/dovecot/dhparam
1575 EOF
1576       fi
1577     } >/etc/dovecot/local.conf
1578
1579     ;;&
1580
1581   # **  $MAIL_HOST)
1582   $MAIL_HOST)
1583     # If we changed 90-sieve.conf and removed the active part of the
1584     # sieve option, we wouldn\'t need this, but I\'d rather not modify a
1585     # default config if not needed. This won\'t work as a symlink in /a/c
1586     # unfortunately.
1587     m sudo -u $u /a/exe/lnf -T sieve/main.sieve $uhome/.dovecot.sieve
1588
1589     if [[ ! -e $uhome/sieve/personal.sieve ]]; then
1590       m touch $uhome/sieve/personal{,end}{,test}.sieve
1591     fi
1592
1593     rm -fv /etc/dovecot/conf.d/20-lmtp.conf # file from prev version
1594     cat >>/etc/dovecot/local.conf <<EOF
1595 # simple password file based login
1596 !include conf.d/auth-passwdfile.conf.ext
1597
1598 # ian: %u is used for alerts user vs iank
1599 mail_location = maildir:/m/%u:LAYOUT=fs:INBOX=/m/%u/INBOX
1600 mail_uid = $u
1601 mail_gid = $u
1602
1603 protocol lmtp {
1604 # For a normal setup with exim, we need something like this, which
1605 # removes the domain part
1606 #  auth_username_format = %Ln
1607 #
1608 #  or else # Exim says something like
1609 #  "LMTP error after RCPT ... 550 ... User doesn't exist someuser@somedomain"
1610 # Dovecot verbose log says something like
1611 # "auth-worker(9048): passwd(someuser@somedomain): unknown user"
1612 # reference: http://wiki.dovecot.org/LMTP/Exim
1613 #
1614 # However, I use this to direct all mail to the same inbox.
1615 # A normal way to do this, which I did at first is to have
1616 # a router in exim almost at the end, eg 950,
1617 #local_catchall:
1618 #  debug_print = "R: catchall for \$local_part@\$domain"
1619 #  driver = redirect
1620 #  domains = +local_domains
1621 #  data = $u
1622 # based on
1623 # http://blog.alteholz.eu/2015/04/exim4-and-catchall-email-address/
1624 # with superflous options removed.
1625 # However, this causes the envelope to be rewritten,
1626 # which makes filtering into mailboxes a little less robust or more complicated,
1627 # so I've done it this way instead. it also requires
1628 # modifying the local router in exim.
1629   auth_username_format = $u
1630 }
1631 EOF
1632     ;;&
1633   # **  bk|je)
1634   bk|je)
1635     chown -R mail.mail /m/md
1636
1637     f=/etc/dovecot/conf.d/10-auth.conf
1638     if [[ -e $f ]]; then
1639       mv $f $f-iank-disabled
1640     fi
1641
1642     cat >>/etc/dovecot/local.conf <<EOF
1643 !include /etc/dovecot/local.conf.ext
1644
1645 # for debugging info, uncomment these.
1646 # logs go to syslog and to /var/log/mail.log
1647 #auth_verbose=yes
1648 #mail_debug=yes
1649
1650
1651 protocol lmtp {
1652 # This downcases the localpart. default is case sensitive.
1653 # case sensitive local part will miss out on valid email when some person or system
1654 # mistakenly capitalizes things.
1655   auth_username_format = %Lu
1656 }
1657
1658 # make 147 only listen on localhost, plan to use for nextcloud.
1659 # copied from mailinabox
1660 service imap-login {
1661   inet_listener imap {
1662     address = 127.0.0.1
1663   }
1664 }
1665 # https://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_dovecot_authenticator.html
1666 service auth {
1667   unix_listener auth-client {
1668     user = Debian-exim
1669     group = Debian-exim
1670   }
1671 }
1672
1673
1674 plugin {
1675   sieve_before = /etc/dovecot/sieve-spam.sieve
1676   # from mailinabox
1677   sieve = /m/sieve/%d/%n.sieve
1678   sieve_dir = /m/sieve/%d/%n
1679 }
1680
1681
1682 # all taken from mailinabox.
1683 mail_location = maildir:/m/md/%d/%n
1684 # meh, ok.
1685 mail_privileged_group = mail
1686 # By default Dovecot allows users to log in only with UID numbers 500 and above. mail is 8
1687 first_valid_uid = 1
1688
1689 # todo: test these changes in the universal config
1690 # mailboxes taken from mailinabox but removed
1691 # settings duplicate to defaults
1692 namespace inbox {
1693   mailbox INBOX {
1694     auto = subscribe
1695   }
1696   mailbox Spam {
1697     special_use = \Junk
1698     auto = subscribe
1699   }
1700   mailbox Drafts {
1701     auto = subscribe
1702   }
1703   mailbox Sent {
1704     auto = subscribe
1705   }
1706   mailbox Trash {
1707     auto = subscribe
1708   }
1709   mailbox Archive {
1710     special_use = \Archive
1711     auto = subscribe
1712   }
1713 }
1714 auth_mechanisms = plain login
1715 EOF
1716
1717     i /etc/dovecot/sieve-spam.sieve <<'EOF'
1718 require ["regex", "fileinto", "imap4flags"];
1719
1720 if allof (header :regex "X-Spam-Status" "^Yes") {
1721   fileinto "Spam";
1722   stop;
1723 }
1724 EOF
1725
1726     i /etc/dovecot/local.conf.ext <<'EOF'
1727 passdb {
1728   driver = sql
1729   args = /etc/dovecot/dovecot-sql.conf.ext
1730 }
1731 userdb {
1732   driver = sql
1733   args = /etc/dovecot/dovecot-sql.conf.ext
1734 }
1735
1736 EOF
1737
1738     i /etc/dovecot/dovecot-sql.conf.ext <<'EOF'
1739 # from mailinabox
1740 driver = sqlite
1741 connect = /m/rc/users.sqlite
1742 default_pass_scheme = SHA512-CRYPT
1743 password_query = SELECT email as user, password FROM users WHERE email='%u';
1744 user_query = SELECT email AS user, "mail" as uid, "mail" as gid, "/m/md/%d/%n" as home FROM users WHERE email='%u';
1745 iterate_query = SELECT email AS user FROM users;
1746 EOF
1747     m chmod 0600 /etc/dovecot/dovecot-sql.conf.ext # per Dovecot instructions
1748
1749     # db needs to be in a www-data writable directory
1750     db=/m/rc/users.sqlite
1751     if [[ ! -s $db ]]; then
1752       m mkdir -p /m/rc
1753       m sqlite3 $db <<'EOF'
1754 CREATE TABLE users (
1755 id INTEGER PRIMARY KEY AUTOINCREMENT,
1756 email TEXT NOT NULL UNIQUE,
1757 password TEXT NOT NULL,
1758 extra,
1759 privileges TEXT NOT NULL DEFAULT '');
1760 EOF
1761     fi
1762     # example of adding a user:
1763     # hash: doveadm pw -s SHA512-CRYPT -p passhere
1764     # sqlite3 /m/rc/users.sqlite <<'EOF'
1765     #insert into users (email, password) values ('testignore@bk.b8.nz', 'hash');
1766     #EOF
1767     # update users set password = 'hash' where email = 'testignore@bk.b8.nz';
1768
1769     # this should be at the end since it requires a valid dovecot config
1770     m sievec /etc/dovecot/sieve-spam.sieve
1771     ;;&
1772   # **  bk)
1773   bk)
1774     # roundcube uses this
1775     mkdir -p /m/sieve
1776     chown mail.mail /m/sieve
1777     m pi dovecot-managesieved
1778     ;;
1779 esac
1780
1781 # * thunderbird autoconfig setup
1782
1783 bkdomains=(expertpathologyreview.com amnimal.ninja)
1784 if [[ $HOSTNAME == bk ]]; then
1785   for domain in ${bkdomains[@]}; do
1786     m /a/exe/web-conf apache2 autoconfig.$domain
1787     dir=/var/www/autoconfig.$domain/html/mail
1788     m mkdir -p $dir
1789     # taken from mailinabox
1790     i $dir/config-v1.1.xml <<EOF
1791 <?xml version="1.0" encoding="UTF-8"?>
1792 <clientConfig version="1.1">
1793     <emailProvider id="$domain">
1794       <domain>$domain</domain>
1795
1796       <displayName>$domain Mail</displayName>
1797       <displayShortName>$domain</displayShortName>
1798
1799       <incomingServer type="imap">
1800          <hostname>mail2.iankelling.org</hostname>
1801          <port>993</port>
1802          <socketType>SSL</socketType>
1803          <username>%EMAILADDRESS%</username>
1804          <authentication>password-cleartext</authentication>
1805       </incomingServer>
1806
1807       <outgoingServer type="smtp">
1808          <hostname>mail2.iankelling.org</hostname>
1809          <port>587</port>
1810          <socketType>STARTTLS</socketType>
1811          <username>%EMAILADDRESS%</username>
1812          <authentication>password-cleartext</authentication>
1813          <addThisServer>true</addThisServer>
1814          <useGlobalPreferredServer>false</useGlobalPreferredServer>
1815       </outgoingServer>
1816
1817       <documentation url="https://$domain/">
1818          <descr lang="en">$domain website.</descr>
1819       </documentation>
1820     </emailProvider>
1821
1822     <webMail>
1823       <loginPage url="https://$domain/roundcube" />
1824       <loginPageInfo url="https://$domain/roundcube" >
1825         <username>%EMAILADDRESS%</username>
1826         <usernameField id="rcmloginuser" name="_user" />
1827         <passwordField id="rcmloginpwd" name="_pass" />
1828         <loginButton id="rcmloginsubmit" />
1829       </loginPageInfo>
1830     </webMail>
1831     <clientConfigUpdate url="https://autoconfig.$domain/mail/config-v1.1.xml" />
1832 </clientConfig>
1833 EOF
1834   done
1835 fi
1836
1837 # * roundcube setup
1838
1839 if [[ $HOSTNAME == bk ]]; then
1840
1841   # zip according to /installer
1842   # which requires adding a line to /usr/local/lib/roundcubemail/config/config.inc.php
1843   # $config['enable_installer'] = true;
1844   pi roundcube roundcube-sqlite3 php-zip apache2 php-fpm
1845
1846   ### begin composer install
1847   # https://getcomposer.org/doc/faqs/how-to-install-composer-programmatically.md
1848   # cd $(mktemp -d)
1849   # sum="$(wget -q -O - https://composer.github.io/installer.sig)"
1850   # m php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
1851   # if [[ $sum != $(php -r "echo hash_file('sha384', 'composer-setup.php');") ]]; then
1852   #   echo 'ERROR: Invalid composer installer checksum' >&2
1853   #   rm -fv composer-setup.php
1854   #   exit 1
1855   # fi
1856   # m php composer-setup.php --quiet
1857   # rm -fv composer-setup.php
1858   # m mv composer.phar /usr/local/bin
1859
1860   # the above method gets composer2, carddav plugin at least doesnt work with that
1861   # yet, it was just released 10-24-2020.
1862   m cd /usr/local/bin
1863   m wget -nv -N https://getcomposer.org/composer-1.phar
1864   chmod +x composer-1.phar
1865   ### end composer install
1866
1867   rcdirs=(/usr/local/lib/rcexpertpath /usr/local/lib/rcninja)
1868   ncdirs=(/var/www/ncexpertpath /var/www/ncninja)
1869   # point debian cronjob to our local install, preventing daily cron error
1870
1871   # debian's cronjob will fail, remove both paths it uses just to be sure
1872   rm -fv /usr/share/roundcube/bin/cleandb.sh /etc/cron.d/roundcube-core
1873
1874   #### begin dl roundcube
1875   # note, im r2e subbed to https://github.com/roundcube/roundcubemail/releases.atom
1876   v=1.4.13; f=roundcubemail-$v-complete.tar.gz
1877   cd /a/opt
1878   if [[ -e $f ]]; then
1879     timestamp=$(stat -c %Y $f)
1880   else
1881     timestamp=0
1882   fi
1883   m wget -nv -N https://github.com/roundcube/roundcubemail/releases/download/$v/$f
1884   new_timestamp=$(stat -c %Y $f)
1885   for rcdir in ${rcdirs[@]}; do
1886     if [[ $timestamp != "$new_timestamp" ||  ! -e "$rcdir/config/secret" ]]; then
1887       m tar -C /usr/local/lib --no-same-owner -zxf $f
1888       m rm -rf $rcdir
1889       m mv /usr/local/lib/roundcubemail-$v $rcdir
1890     fi
1891   done
1892   #### end dl roundcube
1893
1894   for ((i=0; i < ${#bkdomains[@]}; i++)); do
1895     domain=${bkdomains[i]}
1896     rcdir=${rcdirs[i]}
1897     rcbase=${rcdir##*/}
1898     ncdir=${ncdirs[i]}
1899
1900     # copied from debians cronjob
1901     i /etc/cron.d/$rcbase <<EOF
1902 #  Roundcube database cleaning: finally removes all records that are
1903 #  marked as deleted.
1904 0   5  *   *   *   www-data $rcdir/bin/cleandb.sh >/dev/null
1905 EOF
1906
1907     m /a/exe/web-conf - apache2 $domain <<EOF
1908 Alias /roundcube $rcdir
1909 ### begin roundcube settings
1910 # taken from /etc/apache2/conf-available/roundcube.conf version 1.4.8+dfsg.1-1~bpo10+1
1911 <Directory $rcdir/>
1912   Options +FollowSymLinks
1913   # This is needed to parse $rcdir/.htaccess.
1914   AllowOverride All
1915   Require all granted
1916 </Directory>
1917 # Protecting basic directories:
1918 <Directory $rcdir/config>
1919   Options -FollowSymLinks
1920   AllowOverride None
1921 </Directory>
1922 ### end roundcube settings
1923
1924
1925 ### begin nextcloud settings
1926 Alias /nextcloud "$ncdir/"
1927 <Directory $ncdir/>
1928   Require all granted
1929   AllowOverride All
1930   Options FollowSymLinks MultiViews
1931
1932   <IfModule mod_dav.c>
1933     Dav off
1934   </IfModule>
1935
1936 </Directory>
1937
1938 # based on install checker, links to
1939 # https://docs.nextcloud.com/server/19/admin_manual/issues/general_troubleshooting.html#service-discovery
1940 # their example was a bit wrong, I figured it out by adding
1941 # LogLevel warn rewrite:trace5
1942 # then watching the apache logs
1943
1944 RewriteEngine on
1945 RewriteRule ^/\.well-known/host-meta /nextcloud/public.php?service=host-meta [QSA,L]
1946 RewriteRule ^/\.well-known/host-meta\.json /nextcloud/public.php?service=host-meta-json [QSA,L]
1947 RewriteRule ^/\.well-known/webfinger /nextcloud/public.php?service=webfinger [QSA,L]
1948 RewriteRule ^/\.well-known/carddav /nextcloud/remote.php/dav/ [R=301,L]
1949 RewriteRule ^/\.well-known/caldav /nextcloud/remote.php/dav/ [R=301,L]
1950 ### end nextcloud settings
1951 EOF
1952     if [[ ! -e $rcdir/config/secret ]]; then
1953       base64 </dev/urandom | head -c24 >$rcdir/config/secret || [[ $? == 141 || ${PIPESTATUS[0]} == 32 ]]
1954     fi
1955     secret=$(cat $rcdir/config/secret)
1956
1957     rclogdir=/var/log/$rcbase
1958     rctmpdir=/var/tmp/$rcbase
1959     rcdb=/m/rc/$rcbase.sqlite
1960     # config from mailinabox
1961     i $rcdir/config/config.inc.php <<EOF
1962 <?php
1963 \$config = array();
1964 # debian creates this for us
1965 \$config['log_dir'] = '$rclogdir/';
1966 # debian also creates a temp dir, but it is under its install dir,
1967 # seems better to have our own.
1968 \$config['temp_dir'] = '$rctmpdir/';
1969 \$config['db_dsnw'] = 'sqlite:///$rcdb?mode=0640';
1970 \$config['default_host'] = 'ssl://localhost';
1971 \$config['default_port'] = 993;
1972 \$config['imap_conn_options'] = array(
1973   'ssl'         => array(
1974      'verify_peer'  => false,
1975      'verify_peer_name'  => false,
1976    ),
1977  );
1978 \$config['imap_timeout'] = 15;
1979 \$config['smtp_server'] = 'tls://127.0.0.1';
1980 \$config['smtp_conn_options'] = array(
1981   'ssl'         => array(
1982      'verify_peer'  => false,
1983      'verify_peer_name'  => false,
1984    ),
1985  );
1986 \$config['product_name'] = 'webmail';
1987 \$config['des_key'] = '$secret';
1988 \$config['plugins'] = array('archive', 'zipdownload', 'password', 'managesieve', 'jqueryui', 'carddav', 'html5_notifier');
1989 \$config['skin'] = 'elastic';
1990 \$config['login_autocomplete'] = 2;
1991 \$config['password_charset'] = 'UTF-8';
1992 \$config['junk_mbox'] = 'Spam';
1993 # disable builtin addressbook
1994 \$config['address_book_type'] = '';
1995 ?>
1996 EOF
1997
1998     m mkdir -p $rclogdir
1999     m chmod 750 $rclogdir
2000     m chown www-data:adm $rclogdir
2001     # note: subscribed to updates:
2002     # r2e add rcmcarddav https://github.com/blind-coder/rcmcarddav/commits/master.atom ian@iankelling.org
2003     # r2e add roundcube https://github.com/roundcube/roundcubemail/releases.atom ian@iankelling.org
2004     m mkdir -p $rctmpdir /m/rc
2005     m chown -R www-data.www-data $rctmpdir /m/rc
2006     m chmod 750 $rctmpdir
2007     # Ensure the log file monitored by fail2ban exists, or else fail2ban can't start.
2008     # todo: check for other mailinabox things
2009     m sudo -u www-data touch $rclogdir/errors.log
2010
2011     #### begin carddav install
2012     # This is the official roundcube carddav repo.
2013     # Install doc suggests downloading with composer, but that
2014     # didnt work, it said some ldap package for roundcube was missing,
2015     # but I dont want to download some extra ldap thing.
2016     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/INSTALL.md
2017     verf=$rcdir/plugins/carddav/myversion
2018     upgrade=false
2019     install=false
2020     v=4.0.0
2021     if [[ -e $verf ]]; then
2022       if [[ $(cat $verf) != "$v" ]]; then
2023         install=true
2024         upgrade=true
2025       fi
2026     else
2027       install=true
2028     fi
2029     if $install; then
2030       m rm -rf $rcdir/plugins/carddav
2031       tmpd=$(mktemp -d)
2032       m wget -nv -O $tmpd/t.tgz https://github.com/blind-coder/rcmcarddav/releases/download/v$v/carddav-v$v.tgz
2033       cd $rcdir/plugins
2034       tar xzf $tmpd/t.tgz
2035       rm -rf $tmpd
2036       m chown -R www-data:www-data $rcdir/plugins/carddav
2037       m cd $rcdir/plugins/carddav
2038       if $upgrade; then
2039         m sudo -u www-data composer-1.phar update --no-dev
2040       else
2041         m sudo -u www-data composer-1.phar install --no-dev
2042       fi
2043       m chown -R root:root $rcdir/plugins/carddav
2044       echo $v >$verf
2045     fi
2046
2047     # So, strangely, this worked in initial testing, but then
2048     # on first run it wouldn't show the existing contacts until
2049     # I went into the carddav settings and did "force immediate sync",
2050     # which seemed to fix things. Note, some of these settings
2051     # get initalized per/addressbook in the db, then need changing
2052     # there or through the settings menu.
2053
2054     # About categories, see https://www.davx5.com/tested-with/nextcloud
2055     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/GROUPS.md
2056     i $rcdir/plugins/carddav/config.inc.php <<EOF;
2057 <?php
2058 \$prefs['_GLOBAL']['hide_preferences'] = false;
2059 \$prefs['davserver'] = array(
2060 # name in the UI is kind of dumb. This is just something short that seems to fit ok.
2061   'name'         =>  'Main',
2062   'username'     =>  '%u', // login username
2063   'password'     =>  '%p', // login password
2064   'url'          =>  'https://$domain/nextcloud/remote.php/dav/addressbooks/users/%u/contacts',
2065   'active'       =>  true,
2066   'readonly'     =>  false,
2067   'refresh_time' => '00:10:00',
2068   'fixed'        =>  array('username','password'),
2069   'use_categories' => false,
2070   'hide'        =>  false,
2071 );
2072 ?>
2073 EOF
2074     #### end carddav install
2075
2076     cd $rcdir/plugins
2077     if [[ ! -d html5_notifier ]]; then
2078       m git clone https://github.com/stremlau/html5_notifier
2079     fi
2080     cd $rcdir/plugins/html5_notifier
2081     m git pull --rebase
2082
2083     # todo: try out roundcube plugins: thunderbird labels
2084
2085     # Password changing plugin settings
2086     cat $rcdir/plugins/password/config.inc.php.dist - >$rcdir/plugins/password/config.inc.php <<'EOF'
2087 # following are from mailinabox
2088 $config['password_minimum_length'] = 8;
2089 $config['password_db_dsn'] = 'sqlite:////m/rc/users.sqlite';
2090 $config['password_query'] = 'UPDATE users SET password=%D WHERE email=%u';
2091 $config['password_dovecotpw'] = '/usr/bin/doveadm pw';
2092 $config['password_dovecotpw_method'] = 'SHA512-CRYPT';
2093 $config['password_dovecotpw_with_method'] = true;
2094 EOF
2095     # so PHP can use doveadm, for the password changing plugin
2096     m usermod -a -G dovecot www-data
2097     m usermod -a -G mail $u
2098
2099     # so php can update passwords
2100     m chown www-data:dovecot /m/rc/users.sqlite
2101     m chmod 664 /m/rc/users.sqlite
2102
2103     # Run Roundcube database migration script (database is created if it does not exist)
2104     m $rcdir/bin/updatedb.sh --dir $rcdir/SQL --package roundcube
2105     m chown www-data:www-data $rcdb
2106     m chmod 664 $rcdb
2107   done # end loop over domains and rcdirs
2108
2109   ### begin php setup for rc ###
2110   # Enable PHP modules.
2111   m phpenmod -v php mcrypt imap
2112   # dpkg says this is required
2113   m a2enmod proxy_fcgi setenvif
2114   fpm=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* (php[^ ]*-fpm)( .*|$)/\1/p') # eg: php7.4-fpm
2115   phpver=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* php([^ ]*)-fpm( .*|$)/\1/p')
2116   m a2enconf $fpm
2117   # 3 useless guides on php fpm fcgi debian 10 later, i figure out from reading
2118   # /etc/apache2/conf-enabled/php7.3-fpm.conf
2119   m a2dismod php$phpver
2120   # according to /install, we should set date.timezone,
2121   # but that is dumb, the system already has the right zone in
2122   # $rclogdir/errors.log
2123   # todo: consider other settings in
2124   # /a/opt/mailinabox/setup/nextcloud.sh
2125   i /etc/php/$phpver/cli/conf.d/30-local.ini <<'EOF'
2126 apc.enable_cli = 1
2127 EOF
2128
2129   i /etc/php/$phpver/fpm/conf.d/30-local.ini <<'EOF'
2130 date.timezone = "America/New_York"
2131 # for nextcloud
2132 upload_max_filesize = 2000M
2133 post_max_size = 2000M
2134 # install checker, nextcloud/settings/admin/overview
2135 memory_limit = 512M
2136 EOF
2137   m systemctl restart $fpm
2138   # dunno if reload/restart is needed
2139   m systemctl reload apache2
2140   # note bk backups are defined in crontab outside this file
2141   ### end php setup for rc ###
2142
2143 fi # end roundcube setup
2144
2145 # * nextcloud setup
2146
2147 if [[ $HOSTNAME == bk ]]; then
2148   # from install checker, nextcloud/settings/admin/overview and
2149   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2150   # curl from the web installer requirement, but i switched to cli
2151   # it recommends php-file info, but that is part of php7.3-common, already got installed
2152   # with roundcube.
2153   m pi php-curl php-bz2 php-gmp php-bcmath php-imagick php-apcu
2154
2155   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2156   cat >/etc/php/$phpver/fpm/pool.d/localwww.conf <<'EOF'
2157 [www]
2158 clear_env = no
2159 EOF
2160
2161   for ((i=0; i < ${#bkdomains[@]}; i++)); do
2162     domain=${bkdomains[i]}
2163     ncdir=${ncdirs[i]}
2164     ncbase=${ncdir##*/}
2165     m cd /var/www
2166     if [[ ! -e $ncdir/index.php ]]; then
2167       # if we wanted to only install a specific version, use something like
2168       # file=latest-22.zip
2169       file=latest.zip
2170       m wget -nv -N https://download.nextcloud.com/server/releases/$file
2171       m rm -rf nextcloud
2172       m unzip -q $file
2173       m rm -f $file
2174       m chown -R www-data.www-data nextcloud
2175       m mv nextcloud $ncdir
2176       m cd $ncdir
2177       m sudo -u www-data php occ  maintenance:install --database sqlite --admin-user iank --admin-pass $nextcloud_admin_pass
2178     fi
2179     # note, strange this happend where updater did not increment the version var,
2180     # mine was stuck on 20. I manually updated it.
2181     m cd $ncdir/config
2182     if [[ ! -e config.php-orig ]]; then
2183       m cp -a config.php config.php-orig
2184     fi
2185     cat config.php-orig - >tmp.php <<EOF
2186 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/email_configuration.html
2187 \$CONFIG["mail_smtpmode"] = "sendmail";
2188 \$CONFIG["mail_smtphost"] = "127.0.0.1";
2189 \$CONFIG["mail_smtpport"] = 25;
2190 \$CONFIG["mail_smtptimeout"] = 10;
2191 \$CONFIG["mail_smtpsecure"] = "";
2192 \$CONFIG["mail_smtpauth"] = false;
2193 \$CONFIG["mail_smtpauthtype"] = "LOGIN";
2194 \$CONFIG["mail_smtpname"] = "";
2195 \$CONFIG["mail_smtppassword"] = "";
2196 \$CONFIG["mail_domain"] = "$domain";
2197
2198 # https://github.com/nextcloud/user_external#readme
2199 # plus mailinabox example
2200 #\$CONFIG['user_backends'] = array(array('class' => 'OC_User_IMAP','arguments' => array('127.0.0.1', 143, null),),);
2201
2202
2203 # based on installer check
2204 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/caching_configuration.html
2205 \$CONFIG['memcache.local'] = '\OC\Memcache\APCu';
2206
2207 \$CONFIG['overwrite.cli.url'] = 'https://$domain/nextcloud';
2208 \$CONFIG['htaccess.RewriteBase'] = '/nextcloud';
2209 \$CONFIG['trusted_domains'] = array (
2210         0 => '$domain',
2211     );
2212 #\$CONFIG[''] = '';
2213 fwrite(STDOUT, "<?php\n\\\$CONFIG = ");
2214 var_export(\$CONFIG);
2215 fwrite(STDOUT, ";\n");
2216 EOF
2217     m php tmp.php >config.php
2218     m rm tmp.php
2219     m sudo -u www-data php $ncdir/occ maintenance:update:htaccess
2220     list=$(sudo -u www-data php $ncdir/occ --output=json_pretty app:list)
2221     # user_external not compaible with nc 23
2222     for app in contacts calendar; do
2223       if [[ $(printf "%s\n" "$list"| jq ".enabled.$app") == null ]]; then
2224         m sudo -u www-data php $ncdir/occ app:install $app
2225       fi
2226     done
2227     i /etc/systemd/system/$ncbase.service <<EOF
2228 [Unit]
2229 Description=ncup $ncbase
2230 After=multi-user.target
2231
2232 [Service]
2233 Type=oneshot
2234 ExecStart=/usr/local/bin/ncup $ncbase
2235 User=www-data
2236 IOSchedulingClass=idle
2237 CPUSchedulingPolicy=idle
2238 EOF
2239     i /etc/systemd/system/$ncbase.timer <<EOF
2240 [Unit]
2241 Description=ncup $ncbase timer
2242
2243 [Timer]
2244 OnCalendar=Daily
2245
2246 [Install]
2247 WantedBy=timers.target
2248 EOF
2249     systemctl enable --now $ncbase.timer
2250     i /usr/local/bin/ncup <<'EOFOUTER'
2251 #!/bin/bash
2252 if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
2253 shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
2254 set -eE -o pipefail
2255 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR
2256
2257 ncbase=$1
2258 if ! php /var/www/$ncbase/updater/updater.phar -n; then
2259   echo failed nextcloud update for $ncbase >&2
2260   /sbin/exim -t <<EOF
2261 To: alerts@iankelling.org
2262 From: root@$(hostname -f)
2263 Subject: failed nextcloud update for $ncbase
2264
2265 For logs, run: jr -u $ncbase
2266 EOF
2267 fi
2268 EOFOUTER
2269
2270     mkdir -p /var/www/cron-errors
2271     chown www-data.www-data /var/www/cron-errors
2272     i /etc/cron.d/$ncbase <<EOF
2273 PATH=/sbin:/usr/sbin:/usr/bin:/bin:/usr/local/bin
2274 SHELL=/bin/bash
2275 # https://docs.nextcloud.com/server/20/admin_manual/configuration_server/background_jobs_configuration.html
2276 */5  *  *  *  * www-data php -f $ncdir/cron.php --define apc.enable_cli=1 |& log-once nccron
2277 EOF
2278
2279   done
2280 fi
2281
2282
2283 # * exim host conditional config
2284
2285 # ** exim certs
2286
2287 all_dirs=(/p/c/filesystem)
2288 for x in /p/c/machine_specific/*.hosts /a/bin/ds/machine_specific/*.hosts; do
2289   if grep -qxF $HOSTNAME $x; then all_dirs+=( ${x%.hosts} ); fi
2290 done
2291 files=()
2292 for d in ${all_dirs[@]}; do
2293   f=$d/etc/exim4/passwd
2294   if [[ -e $f  ]]; then
2295     files+=($f)
2296   fi
2297   tmp=($d/etc/exim4/*.pem)
2298   if (( ${#tmp[@]} )); then
2299     files+=(${tmp[@]})
2300   fi
2301 done
2302
2303 if (( ${#files[@]} )); then
2304   sudo rsync -ahhi --chown=root:Debian-exim --chmod=0640 ${files[@]} /etc/exim4/
2305 fi
2306
2307
2308 # ** exim: auth
2309
2310 case $HOSTNAME in
2311   bk|je)
2312     # avoid accepting mail for invalid users
2313     # https://wiki.dovecot.org/LMTP/Exim
2314     cat >>/etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2315 deny
2316   message = invalid recipient
2317   domains = +local_domains
2318   !verify = recipient/callout=no_cache
2319 EOF
2320     i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2321 dovecot_plain:
2322   driver = dovecot
2323   public_name = PLAIN
2324   server_socket = /var/run/dovecot/auth-client
2325   server_set_id = $auth1
2326 EOF
2327     ;;
2328 esac
2329 if $bhost_t; then
2330   i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2331 # from 30_exim4-config_examples
2332 plain_server:
2333 driver = plaintext
2334 public_name = PLAIN
2335 server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
2336 server_set_id = $auth2
2337 server_prompts = :
2338 .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
2339 server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
2340 .endif
2341 EOF
2342 fi
2343
2344 # ** exim: main daemon use non-default config file
2345 case $HOSTNAME in
2346   bk|$MAIL_HOST)
2347     # to see the default comments in /etc/default/exim4:
2348     # s update-exim4defaults --force --init
2349     # which will overwrite any existing file
2350     i /etc/default/exim4 <<'EOF'
2351 QUEUERUNNER='combined'
2352 QUEUEINTERVAL='30m'
2353 COMMONOPTIONS='-C /etc/exim4/my.conf'
2354 UPEX4OPTS='-o /etc/exim4/my.conf'
2355 #E4BCD_PANICLOG_NOISE='exim user lost privilege for using -C option'
2356 EOF
2357     chown Debian-exim:Debian-exim /usr/sbin/exim4
2358     # needs guid set in order to become Debian-exim
2359     chmod g+s,u+s /usr/sbin/exim4
2360     i /etc/exim4/trusted_configs <<'EOF'
2361 /etc/exim4/my.conf
2362 EOF
2363     ;;
2364   *)
2365     # default file
2366     i /etc/default/exim4 <<'EOF'
2367 QUEUERUNNER='combined'
2368 QUEUEINTERVAL='30m'
2369 EOF
2370     ;;
2371 esac
2372
2373 # ** exim non-root
2374
2375 case $HOSTNAME in
2376   bk|je|li)
2377     # no reason to expect it to ever be there.
2378     rm -fv /etc/systemd/system/exim4.service.d/nonroot.conf
2379     ;;
2380   *)
2381     dirs=()
2382     for d in /d /m /media /mnt /nocow /o /p /q; do
2383       if [[ -d $d ]]; then
2384         dirs+=($d)
2385       fi
2386     done
2387     i /etc/systemd/system/exim4.service.d/nonroot.conf <<EOF
2388 [Service]
2389 # see 56.2 Root privilege in exim spec
2390 AmbientCapabilities=CAP_NET_BIND_SERVICE
2391 # https://www.redhat.com/sysadmin/mastering-systemd
2392 # things that seem good and reasonabl.e
2393 PrivateTmp=yes
2394 ProtectHome=yes
2395 # note, in t10 systemd, if one of these is an sshfs mountpoint,
2396 # this whole setting doesnt work. tried it with a newer systemd 250 though
2397 # an nspawn, and it worked there.
2398 InaccessiblePaths=${dirs[@]}
2399 NoNewPrivileges=yes
2400 ProtectSystem=yes
2401
2402 # when we get newer systemd
2403 #ProtectDevices=yes
2404 EOF
2405     i /etc/exim4/conf.d/main/000_local-noroot <<'EOF'
2406 # see 56.2 Root privilege in exim spec
2407 deliver_drop_privilege = true
2408 EOF
2409     files=(
2410       300_exim4-config_real_local
2411       600_exim4-config_userforward
2412       700_exim4-config_procmail
2413       800_exim4-config_maildrop
2414       mmm_mail4root
2415     )
2416     for f in ${files[@]}; do
2417       echo "# iank: removed due to running nonroot"|i /etc/exim4/conf.d/router/$f
2418     done
2419     ;;
2420 esac
2421
2422 case $HOSTNAME in
2423
2424   # ** $MAIL_HOST|bk|je)
2425   $MAIL_HOST|bk|je)
2426
2427     echo|i /etc/exim4/conf.d/router/870_backup_local
2428
2429     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2430 # note: some things we don't set that are here by default because they are unused.
2431 dc_local_interfaces=''
2432 dc_eximconfig_configtype='internet'
2433 dc_localdelivery='dovecot_lmtp'
2434 EOF
2435     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2436 # recommended if dns is expected to work
2437 CHECK_RCPT_VERIFY_SENDER = true
2438 # default config comment says: If you enable this, you might reject legitimate mail,
2439 # but eggs has had this a long time, so that seems unlikely.
2440 CHECK_RCPT_SPF = true
2441 CHECK_RCPT_REVERSE_DNS = true
2442 CHECK_MAIL_HELO_ISSUED = true
2443
2444 # enable 587 in addition to the default 25, so that
2445 # i can send mail where port 25 is firewalled by isp
2446 daemon_smtp_ports = 25 : 587
2447 # default of 25, can get stuck when catching up on mail
2448 smtp_accept_max = 400
2449 smtp_accept_reserve = 100
2450 smtp_reserve_hosts = +iank_trusted
2451
2452 # options exim has to avoid having to alter the default config files
2453 CHECK_RCPT_LOCAL_ACL_FILE = /etc/exim4/conf.d/rcpt_local_acl
2454 CHECK_DATA_LOCAL_ACL_FILE = /etc/exim4/conf.d/data_local_acl
2455 LOCAL_DENY_EXCEPTIONS_LOCAL_ACL_FILE = /etc/exim4/conf.d/local_deny_exceptions_acl
2456 # testing dmarc
2457 #dmarc_tld_file = /etc/public_suffix_list.dat
2458 EOF
2459     ;;&
2460
2461   # ** $MAIL_HOST|bk)
2462   $MAIL_HOST|bk)
2463
2464     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2465 # je.b8.nz will run out of memory with freshclam
2466 av_scanner = clamd:/var/run/clamav/clamd.ctl
2467 EOF
2468
2469     cat >> /etc/exim4/conf.d/data_local_acl <<'EOF'
2470 deny
2471   malware = */defer_ok
2472   !condition = ${if match {$malware_name}{\N^Heuristic\N}}
2473   message = This message was detected as possible malware ($malware_name).
2474 EOF
2475
2476     cat >/etc/exim4/conf.d/main/000_local-nn <<EOF
2477 # MAIN_HARDCODE_PRIMARY_HOSTNAME might mess up the
2478 # smarthost config type, not sure.
2479 # failing message on mail-tester.com:
2480 # We check if there is a server (A Record) behind your hostname kd.
2481 # You may want to publish a DNS record (A type) for the hostname kd or use a different hostname in your mail software
2482 # https://serverfault.com/questions/46545/how-do-i-change-exim4s-primary-hostname-on-a-debian-box
2483 # and this one seemed appropriate from grepping config.
2484 # I originally set this to li.iankelling.org, but then ended up with errors when li tried to send
2485 # mail to kd, so this should basically be a name that no host has as their
2486 # canonical hostname since the actual host sits behind a nat and changes.
2487 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail.iankelling.org
2488 # I used this to avoid sender verification, didnt work but it still
2489 # makes sense based on the spec.
2490 hosts_treat_as_local = defaultnn.b8.nz
2491
2492 # Outside nn, we get the default cert location from a debian macro,
2493 # and the cert file is put in place by a certbot hook.
2494 MAIN_TLS_CERTIFICATE = /etc/exim4/fullchain.pem
2495 MAIN_TLS_PRIVATEKEY = /etc/exim4/privkey.pem
2496 EOF
2497
2498     i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost <<'EOF'
2499 gnusmarthost:
2500   debug_print = "R: smarthost for $local_part@$domain"
2501   driver = manualroute
2502   domains = ! +local_domains
2503 # send most mail through eggs, helps fsfs sender reputation.
2504 # uncomment and optionally move to 188 file to send through my own servers again
2505   senders = *@gnu.org
2506   transport = smarthost_dkim
2507   route_list = * fencepost.gnu.org::587 byname
2508   host_find_failed = ignore
2509   same_domain_copy_routing = yes
2510   no_more
2511 EOF
2512
2513     /a/exe/cedit defaultnn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2514 10.173.8.1 defaultnn.b8.nz
2515 EOF
2516     ;;&
2517   # ** $MAIL_HOST)
2518   $MAIL_HOST)
2519
2520     i /etc/exim4/conf.d/router/195_dnslookup_vpn <<'EOF'
2521 # copied from /etc/exim4/conf.d/router/200_exim4-config_primary, but
2522 # use vpn transport. lower priority so it overrides the default route.
2523 # Use this in case our vpn fails, we dont send anything without it.
2524 .ifdef DCconfig_internet
2525 dnslookup_vpn:
2526   debug_print = "R: dnslookup for $local_part@$domain"
2527   driver = dnslookup
2528   domains = ! +local_domains
2529   transport = remote_smtp_vpn
2530   same_domain_copy_routing = yes
2531   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
2532   no_more
2533 .endif
2534 EOF
2535
2536
2537     # note on backups: I used to do an automatic sshfs and restricted
2538     # permissions to a specific directory on the remote server, /bu/mnt,
2539     # which required using a dedicated user, but realized smtp will be
2540     # more reliable and less fuss. If I ever need that again, see the
2541     # history of this file, and bum in brc2.
2542
2543     i /etc/exim4/conf.d/router/890_backup_copy <<EOF
2544 ### router/900_exim4-config_local_user
2545 #################################
2546
2547 # todo, it would be nice to save sent email too,
2548 # but its not so important, they still exist in my head
2549
2550 backup_redir:
2551 driver = redirect
2552 domains = +local_domains
2553 # b is just an arbirary short string
2554 data = b@eximbackup.b8.nz
2555 # note, to test this, i could temporarily allow testignore.
2556 # alerts avoids potential mail loop. root is already
2557 # redirected earlier, so that is just being overly cautious.
2558 local_parts = ! root : ! testignore : ! alerts
2559 unseen = true
2560
2561 backup_copy:
2562 driver = manualroute
2563 domains = eximbackup.b8.nz
2564 transport = backup_remote
2565 ignore_target_hosts = ${HOSTNAME}wg.b8.nz
2566 # note changes here also require change in passwd.client
2567 route_list = * eximbackup.b8.nz
2568 same_domain_copy_routing = yes
2569 errors_to = alerts@iankelling.org
2570 no_more
2571 EOF
2572
2573
2574     i /etc/exim4/conf.d/transport/30_backup_remote <<'EOF'
2575 backup_remote:
2576   driver = smtp
2577   multi_domain
2578 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
2579   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
2580 .endif
2581   hosts_require_auth = *
2582   hosts_try_auth = *
2583   envelope_to_add
2584   # manual return path because we want it to be the envelope sender
2585   # we got not the one we are using in this smtp transport
2586   headers_add = "Return-path: $sender_address"
2587 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2588   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2589 .endif
2590 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2591   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2592 .endif
2593 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2594   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2595 .endif
2596 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
2597   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
2598 .endif
2599 .ifdef REMOTE_SMTP_HEADERS_REWRITE
2600   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
2601 .endif
2602 .ifdef REMOTE_SMTP_HELO_DATA
2603   helo_data=REMOTE_SMTP_HELO_DATA
2604 .endif
2605 .ifdef TLS_DH_MIN_BITS
2606 tls_dh_min_bits = TLS_DH_MIN_BITS
2607 .endif
2608 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2609 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2610 .endif
2611 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2612 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2613 .endif
2614 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2615   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2616 .endif
2617 EOF
2618
2619
2620     # this avoids some error. i cant remember what. todo:
2621     # test it out and document why/if its needed.
2622     #     i /etc/exim4/host_local_deny_exceptions <<'EOF'
2623     # mail.fsf.org
2624     # *.posteo.de
2625     # EOF
2626
2627     # cron email from smarthost hosts will automatically be to
2628     # USER@FQDN. I redirect that to alerts@, on the smarthosts, but in
2629     # case that doesn't work, we still want to accept that mail, but not
2630     # from any host except the smarthosts. local_hostnames and this rule
2631     # is for that purpose.
2632     i /etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2633 deny
2634   !authenticated = *
2635   domains = +local_hostnames
2636   message = no relay
2637 EOF
2638     echo|i /etc/exim4/conf.d/router/880_universal_forward
2639
2640     # for iank@fsf.org, i have mail.fsf.org forward it to fsf@iankelling.org.
2641     # and also have mail.iankelling.org whitelisted as a relay domain.
2642     # I could avoid that if I changed this to submit to 587 with a
2643     # password like a standard mua.
2644     i /etc/exim4/conf.d/router/188_exim4-config_smarthost <<'EOF'
2645 # ian: copied from /etc/exim4/conf.d/router/200_exim4-config_primary, and added senders = and
2646 # replaced DCsmarthost with hostname
2647 fsfsmarthost:
2648   debug_print = "R: smarthost for $local_part@$domain"
2649   driver = manualroute
2650   domains = ! +local_domains
2651   senders = *@fsf.org
2652   transport = remote_smtp_smarthost
2653   route_list = * mail.fsf.org::587 byname
2654   host_find_failed = ignore
2655   same_domain_copy_routing = yes
2656   no_more
2657
2658 posteosmarthost:
2659   debug_print = "R: smarthost for $local_part@$domain"
2660   driver = manualroute
2661   domains = ! +local_domains
2662   senders = *@posteo.net
2663   transport = remote_smtp_smarthost
2664   route_list = * posteo.de::587 byname
2665   host_find_failed = ignore
2666   same_domain_copy_routing = yes
2667   no_more
2668
2669 EOF
2670
2671     # Greping /etc/exim4, unqualified mails this would end up as
2672     # a return path, so it should go somewhere we will see.
2673     # The debconf output about mailname is as follows:
2674     # The 'mail name' is the domain name used to 'qualify' mail addresses without a domain
2675     # name.
2676     # This name will also be used by other programs. It should be the single, fully
2677     # qualified domain name (FQDN).
2678     # Thus, if a mail address on the local host is foo@example.org, the correct value for
2679     # this option would be example.org.
2680     # This name won\'t appear on From: lines of outgoing messages if rewriting is enabled.
2681     echo iankelling.org > /etc/mailname
2682
2683
2684     # mail.iankelling.org so local imap clients can connect with tls and
2685     # when they happen to not be local.
2686     # todo: this should be 10.8.0.4
2687
2688     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2689 # note: i put nn.b8.nz into bind for good measure
2690 10.173.8.2 nn.b8.nz mx.iankelling.org
2691 EOF
2692
2693     # note: systemd-resolved will consult /etc/hosts, dnsmasq wont. this assumes
2694     # weve configured this file in dnsmasq if we are using it.
2695     /a/exe/cedit mail /etc/dnsmasq-servers.conf <<'EOF' || [[ $? == 1 ]]
2696 server=/mx.iankelling.org/127.0.1.1
2697 EOF
2698     # I used to use debconf-set-selections + dpkg-reconfigure,
2699     # which then updates this file
2700     # but the process is slower than updating it directly and then I want to set other things in
2701     # update-exim4.conf.conf, so there's no point.
2702     # The file is documented in man update-exim4.conf,
2703     # except the man page is not perfect, read the bash script to be sure about things.
2704
2705     # The debconf questions output is additional documentation that is not
2706     # easily accessible, but super long, along with the initial default comment in this
2707     # file, so I've saved that into ./mail-notes.conf.
2708     #
2709     # # TODO: remove mx.iankelling.org once systems get updated mail-setup from jan 2022
2710     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2711 # man page: is used to build the local_domains list, together with "localhost"
2712 # this is duplicated in a later router.
2713 dc_other_hostnames='iankelling.org;zroe.org;r2e.iankelling.org;mx.iankelling.org;!je.b8.nz;!bk.b8.nz;*.b8.nz;b8.nz'
2714 EOF
2715
2716
2717     # dmarc. not used currently
2718     f=/etc/cron.daily/refresh-dmarc-tld-file
2719     cat >$f <<'EOF'
2720 #!/bin/bash
2721 cd /etc
2722 wget -q -N https://publicsuffix.org/list/public_suffix_list.dat
2723 EOF
2724     m chmod 755 $f
2725
2726     ;;
2727   # ** bk
2728   ## we use this host to monitor MAIL_HOST and host a mail server for someone
2729   bk)
2730
2731     echo|i /etc/exim4/conf.d/rcpt_local_acl
2732     echo|i /etc/exim4/conf.d/router/880_universal_forward
2733
2734     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2735 10.173.8.2 nn.b8.nz
2736 EOF
2737
2738     sed -r -f - /etc/init.d/exim4  <<'EOF' | i /etc/init.d/exim4in
2739 s,/etc/default/exim4,/etc/default/exim4in,g
2740 s,/run/exim4/exim.pid,/run/exim4/eximin.pid,g
2741 s,(^[ #]*Provides:).*,\1 exim4in,
2742 s,(^[ #]*NAME=).*,\1"exim4in",
2743 EOF
2744     chmod +x /etc/init.d/exim4in
2745     i /etc/systemd/system/exim4in.service.d/alwaysrestart.conf <<'EOF'
2746 [Unit]
2747 # needed to continually restart
2748 StartLimitIntervalSec=0
2749
2750 [Service]
2751 Restart=always
2752 # time to sleep before restarting a service
2753 RestartSec=20
2754 EOF
2755
2756     i /etc/default/exim4in <<'EOF'
2757 # defaults but no queue runner and alternate config dir
2758 QUEUERUNNER='no'
2759 COMMONOPTIONS='-oP /run/exim4/eximin.pid'
2760 UPEX4OPTS='-d /etc/myexim4'
2761 EOF
2762
2763     echo bk.b8.nz > /etc/mailname
2764     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2765 # man page: is used to build the local_domains list, together with "localhost"
2766 dc_other_hostnames='amnimal.ninja;expertpathologyreview.com;bk.b8.nz'
2767 EOF
2768
2769     ;;
2770   # ** je
2771   je)
2772     echo je.b8.nz > /etc/mailname
2773     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2774 dc_other_hostnames='je.b8.nz'
2775 EOF
2776     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2777     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2778     echo|i /etc/exim4/conf.d/rcpt_local_acl
2779     echo|i /etc/exim4/conf.d/router/880_universal_forward
2780     ;;
2781   # ** not MAIL_HOST|bk|je
2782   *)
2783     # this one should be removed for all non mail hosts, but
2784     # bk and je never become mail_host
2785     echo|i /etc/exim4/conf.d/router/195_dnslookup_vpn
2786
2787     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2788     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2789     echo|i /etc/exim4/conf.d/rcpt_local_acl
2790     echo|i /etc/exim4/conf.d/router/890_backup_copy
2791     echo|i /etc/exim4/conf.d/main/000_local-nn
2792
2793
2794     if $bhost_t; then
2795       cat >>/etc/exim4/conf.d/main/000_local <<EOF
2796 MAIN_TLS_CERTIFICATE = /etc/exim4/certs/$wghost/fullchain.pem
2797 MAIN_TLS_PRIVATEKEY = /etc/exim4/certs/$wghost/privkey.pem
2798 # so we can maintiain the originals of the backups.
2799 # we wouldnt want this if we were dealing with any other
2800 # local deliveries, but we sent all others to the smarthost
2801 # which then strips the headers.
2802 envelope_to_remove = false
2803 return_path_remove = false
2804 EOF
2805     fi
2806
2807     # catches things like cronjob email
2808     i /etc/exim4/conf.d/router/880_universal_forward <<'EOF'
2809 universal_forward:
2810   driver = redirect
2811   domains = +local_domains
2812   data = alerts@iankelling.org
2813 EOF
2814
2815
2816     for unit in ${nn_progs[@]}; do
2817       f=/etc/systemd/system/$unit.service.d/nn.conf
2818       rm -fv $f
2819     done
2820
2821     # dont i dont care if defaultnn section gets left, it wont
2822     # get used.
2823     echo | /a/exe/cedit nn /etc/hosts || [[ $? == 1 ]]
2824     echo | /a/exe/cedit mail /etc/dnsmasq-servers.conf || [[ $? == 1 ]]
2825
2826
2827     if $bhost_t; then
2828       install -d /bu
2829       install -d -g Debian-exim -o Debian-exim -m 771 /bu/md
2830       if [[ -e /bu/md/cur && $(stat -c %u /bu/md/cur) == 1000 ]]; then
2831         chown -R Debian-exim:Debian-exim /bu/md
2832       fi
2833       i /etc/exim4/conf.d/transport/30_backup_maildir <<EOF
2834 # modified debian maildir transport
2835 backup_maildir:
2836   driver = appendfile
2837   directory = /bu/md
2838   delivery_date_add
2839   # note, no return path or envelope added
2840   maildir_format
2841   directory_mode = 0700
2842   mode = 0644
2843   mode_fail_narrower = false
2844 EOF
2845
2846       i /etc/exim4/conf.d/router/870_backup_local <<'EOF'
2847 ### router/900_exim4-config_local_user
2848 #################################
2849
2850 backup_local:
2851   debug_print = "R: local_user for $local_part@$domain"
2852   driver = accept
2853   domains = eximbackup.b8.nz
2854   transport = backup_maildir
2855 EOF
2856
2857       # Bind to wghole to receive mailbackup.
2858       wgholeip=$(sed -rn 's/^ *Address *= *([^/]+).*/\1/p' /etc/wireguard/wghole.conf)
2859       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2860 dc_other_hostnames='eximbackup.b8.nz'
2861 dc_local_interfaces='127.0.0.1;::1;$wgholeip'
2862 EOF
2863
2864       # wghole & thus exim will fail to start without internet connectivity.
2865       i /etc/systemd/system/exim4.service.d/backup.conf <<'EOF'
2866 [Unit]
2867 StartLimitIntervalSec=0
2868
2869 [Service]
2870 Restart=always
2871 RestartSec=20
2872 EOF
2873
2874     else
2875       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2876 # Note: If theres like a temporary problem where mail gets sent to
2877 # one of these hosts, if exim isnt listening, it will be a temporary error
2878 # instead of a permanent 5xx.
2879 dc_local_interfaces='127.0.0.1;::1'
2880 EOF
2881       rm -fv /etc/systemd/system/exim4.service.d/backup.conf
2882     fi
2883     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2884 dc_eximconfig_configtype='smarthost'
2885 dc_smarthost='$smarthost'
2886 EOF
2887
2888     hostname -f |i /etc/mailname
2889     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2890 # The manpage incorrectly states this will do header rewriting, but
2891 # that only happens if we have dc_hide_mailname is set.
2892 dc_readhost='iankelling.org'
2893 # Only used in case of bounces.
2894 dc_localdelivery='maildir_home'
2895 EOF
2896     ;;
2897 esac
2898
2899
2900
2901
2902 # ** $MAILHOST|bk, things that belong at the end
2903 case $HOSTNAME in
2904   $MAIL_HOST|bk)
2905     # config for the non-nn exim
2906     m rsync -ra --delete /etc/exim4/ /etc/myexim4
2907     # If we ever wanted to have a separate spool,
2908     # we could do it like this.
2909     #     cat >>/etc/exim4/conf.d/main/000_local-nn <<'EOF'
2910     # spool_directory = /var/spool/myexim4
2911     # EOF
2912     cat >>/etc/myexim4/update-exim4.conf.conf <<'EOF'
2913 dc_eximconfig_configtype='smarthost'
2914 dc_smarthost='nn.b8.nz'
2915 EOF
2916     ;;&
2917   bk)
2918
2919     # config for the non-nn exim
2920     cat >/etc/myexim4/conf.d/main/000_local-nn <<'EOF'
2921 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail2.iankelling.org
2922 EOF
2923     ;;
2924   $MAIL_HOST)
2925     # for bk, we have a exim4in.service that will do this for us.
2926     m update-exim4.conf -d /etc/myexim4
2927     ;;
2928 esac
2929
2930 # * spool dir setup
2931
2932 # ** bind mount setup
2933 # put spool dir in directory that spans multiple distros.
2934 # based on http://www.postfix.org/qmgr.8.html and my notes in gnus
2935 #
2936 dir=/nocow/exim4
2937 sdir=/var/spool/exim4
2938 # we only do this if our system has $dir
2939
2940 # this used to do a symlink, but, in the boot logs, /nocow would get mounted succesfully,
2941 # about 2 seconds later, exim starts, and immediately puts into paniclog:
2942 # honVi-0000u3-82 Failed to create directory "/var/spool/exim4/input": No such file or directory
2943 # so, im trying a bind mount to get rid of that.
2944 if [[ -e /nocow ]]; then
2945   if ! grep -Fx "/nocow/exim4  /var/spool/exim4  none  bind  0 0" /etc/fstab; then
2946     echo "/nocow/exim4  /var/spool/exim4  none  bind  0 0" >>/etc/fstab
2947   fi
2948   i /etc/systemd/system/exim4.service.d/override.conf <<'EOF'
2949 [Unit]
2950 # without local-fs on exim, we get these kind of errors in paniclog on shutdown:
2951 # Failed to create spool file /var/spool/exim4//input//1jCLxz-0008V4-V9-D: Permission denied
2952 After=local-fs.target
2953 EOF
2954   if ! mountpoint -q $sdir; then
2955     stopifactive exim4 exim4in
2956     if [[ -L $sdir ]]; then
2957       m rm $sdir
2958     fi
2959     if [[ ! -e $dir && -d $sdir ]]; then
2960       m mv $sdir $dir
2961     fi
2962     if [[ ! -d $sdir ]]; then
2963       m mkdir $sdir
2964       m chmod 000 $sdir # only want it to be used when its mounted
2965     fi
2966     m mount $sdir
2967   fi
2968 fi
2969
2970
2971
2972 # ** exim/spool uid setup
2973 # i have the spool directory be common to distro multi-boot, so
2974 # we need the uid to be the same. 608 cuz it's kind of in the middle
2975 # of the free system uids.
2976 IFS=:; read -r _ _ uid _ < <(getent passwd Debian-exim ||:) ||:; unset IFS
2977 IFS=:; read -r _ _ gid _ < <(getent group Debian-exim ||:) ||:; unset IFS
2978 if [[ ! $uid ]]; then
2979   # from /var/lib/dpkg/info/exim4-base.postinst, plus uid and gid options
2980   m adduser --uid 608 --system --group --quiet --home /var/spool/exim4 \
2981     --no-create-home --disabled-login --force-badname Debian-exim
2982 elif [[ $uid != 608 ]]; then
2983   stopifactive exim4 exim4in
2984   m usermod -u 608 Debian-exim
2985   m groupmod -g 608 Debian-exim
2986   m usermod -g 608 Debian-exim
2987   m find / /nocow -path ./var/tmp -prune -o -xdev -uid $uid -execdir chown -h 608 {} +
2988   m find / /nocow -path ./var/tmp -prune -o -xdev -gid $gid -execdir chgrp -h 608 {} +
2989 fi
2990
2991 # * start / stop services
2992
2993 reifactive dnsmasq nscd
2994
2995 if $reload; then
2996   m systemctl daemon-reload
2997 fi
2998
2999 m systemctl --now enable epanicclean.timer
3000
3001 case $HOSTNAME in
3002   je)
3003     /a/exe/web-conf apache2 je.b8.nz
3004     ;;
3005   bk)
3006     /a/exe/web-conf apache2 mail2.iankelling.org
3007     ;;
3008 esac
3009
3010 m /a/bin/ds/mail-cert-cron -1
3011 sre mailcert.timer
3012
3013 case $HOSTNAME in
3014   bk)
3015     # todo, this should be done in distro-begin
3016     soff systemd-resolved
3017     ln -sf 127.0.0.1-resolv/stub-resolv.conf /etc/resolv.conf
3018     ;;&
3019   $MAIL_HOST|bk)
3020     m systemctl --now enable mailnn mailnnroute
3021     ;;&
3022   $MAIL_HOST)
3023     # we use dns to start wg
3024     if $reload; then
3025       sre unbound
3026     else
3027       m systemctl --now enable unbound
3028     fi
3029     ;;&
3030   $MAIL_HOST|bk)
3031     # If these have changes, id rather manually restart it, id rather
3032     # not restart and cause temporary errors
3033     if $reload; then
3034       sre $vpnser
3035     else
3036       m systemctl --now enable $vpnser
3037     fi
3038     if ! systemctl is-active clamav-daemon >/dev/null; then
3039       m systemctl --now enable clamav-daemon
3040       out=$(rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/filesystem/etc/systemd/system/epanicclean.{timer,service} /etc/systemd/system)
3041       if [[ $out ]]; then
3042         reload=true
3043       fi
3044
3045       # note, this will cause paniclog entries because it takes like 45
3046       # seconds for clamav to start, i use ./epanic-clean to remove
3047       # them.
3048     fi
3049     ;;&
3050   $MAIL_HOST|bk|je)
3051     # start spamassassin/dovecot before exim.
3052     sre dovecot spamassassin
3053     # need to wait a bit before restarting exim, else I
3054     # get a paniclog entry like: spam acl condition: all spamd servers failed
3055     sleep 3
3056     m systemctl --now enable mailclean.timer
3057     ;;&
3058   $MAIL_HOST)
3059     # < 2.1 (eg: in t9), uses a different data format which required manual
3060     # migration. dont start if we are running an old version.
3061     if dpkg --compare-versions $(dpkg -s radicale | awk '$1 == "Version:" { print $2 }') ge 2.1; then
3062       m systemctl --now enable radicale
3063     fi
3064     ;;&
3065 esac
3066
3067 # last use of $reload happens in previous block
3068 rm -f /var/local/mail-setup-reload
3069
3070
3071 case $HOSTNAME in
3072   $MAIL_HOST|bk|je) : ;;
3073   *)
3074     soff radicale mailclean.timer dovecot spamassassin $vpnser mailnn clamav-daemon
3075     ;;
3076 esac
3077
3078 sre exim4
3079
3080 case $HOSTNAME in
3081   $MAIL_HOST)
3082     m systemctl --now enable mailbindwatchdog
3083     ;;
3084   *)
3085     soff mailbindwatchdog
3086     ;;
3087 esac
3088
3089
3090 case $HOSTNAME in
3091   bk) sre exim4in ;;
3092 esac
3093
3094 # * mail monitoring / testing
3095
3096 # note, to test clamav, send an email with body that only contains
3097 # https://en.wikipedia.org/wiki/EICAR_test_file
3098 # which set malware_name to Eicar-Signature
3099 case $HOSTNAME in
3100   $MAIL_HOST|bk|je)
3101     # note: cronjob "ian" also does some important monitoring
3102     # todo: this will sometimes cause an alert because mailtest-check will run
3103     # before we have setup network namespace and spamassassin
3104     cat >/etc/cron.d/mailtest <<EOF
3105 SHELL=/bin/bash
3106 PATH=/usr/bin:/bin:/usr/local/bin
3107 MAILTO=alerts@iankelling.org
3108 */5 * * * *   $u send-test-forward |& log-once send-test-forward
3109 */10 * * * *   root chmod -R g+rw /m/md/bounces |& log-once -1 bounces-chmod
3110 # im seeing some intermittent failures on the slow check, do it all the time
3111 # for now. It looks like a dns failure.
3112 #5-59/5 * * * *   root mailtest-check |& log-once -1 mailtest-check
3113 #0 * * * *   root mailtest-check slow |& log-once -1 mailtest-slow
3114 */5 * * * *   root timeout 290 mailtest-check slow |& log-once -12 mailtest-check
3115 # if a bounce happened yesterday, dont let it slip through the cracks
3116 8   1 * * *   root awk '\$5 == "**"' /var/log/exim4/mainlog.1
3117 EOF
3118     m sudo rsync -ahhi --chown=root:root --chmod=0755 \
3119       /b/ds/mailtest-check /b/ds/check-remote-mailqs /usr/local/bin/
3120     ;;&
3121   $MAIL_HOST)
3122     test_froms=(ian@iankelling.org z@zroe.org iank@gnu.org)
3123     test_to="testignore@expertpathologyreview.com, testignore@je.b8.nz, testignore@amnimal.ninja, jtuttle@gnu.org"
3124
3125     cat >>/etc/cron.d/mailtest <<EOF
3126 2   * * * *   root check-remote-mailqs |& log-once check-remote-mailqs
3127 EOF
3128     ;;&
3129   bk)
3130     test_froms=(testignore@expertpathologyreview.com testignore@amnimal.ninja)
3131     test_to="testignore@iankelling.org, testignore@zroe.org, testignore@je.b8.nz"
3132     ;;&
3133   je)
3134     test_froms=(testignore@je.b8.nz)
3135     test_to="testignore@iankelling.org, testignore@zroe.org, testignore@expertpathologyreview.com, testignore@amnimal.ninja"
3136     ;;&
3137   $MAIL_HOST|bk|je)
3138     cat >/usr/local/bin/send-test-forward <<'EOF'
3139 #!/bin/bash
3140 olds=(
3141 $(/sbin/exiqgrep -o 260 -i -r '^(testignore@(iankelling\.org|zroe\.org|expertpathologyreview\.com|amnimal\.ninja|je\.b8\.nz)|jtuttle@gnu\.org)$')
3142 )
3143 if (( ${#olds[@]} )); then
3144   /sbin/exim -Mrm "${olds[@]}" >/dev/null
3145 fi
3146 EOF
3147     for test_from in ${test_froms[@]}; do
3148       cat >>/usr/local/bin/send-test-forward <<EOFOUTER
3149 /usr/sbin/exim -f $test_from -t <<EOF
3150 From: $test_from
3151 To: $test_to
3152 Subject: test \$(date +%Y-%m-%dT%H:%M:%S%z) \$(date +%s)
3153
3154 /usr/local/bin/send-test-forward
3155 EOF
3156 EOFOUTER
3157     done
3158     m chmod +x /usr/local/bin/send-test-forward
3159     ;;
3160   *)
3161     rm -fv /etc/cron.d/mailtest
3162     ;;
3163 esac
3164
3165
3166
3167 # * misc
3168 m sudo -u $u mkdir -p /home/$u/.cache
3169 set -- /m/mucache /home/$u/.cache/mu /m/.mu /home/$u/.mu
3170 while (($#)); do
3171   target=$1
3172   f=$2
3173   shift 2
3174   if [[ ! -L $f ]]; then
3175     if [[ -e $f ]]; then
3176       rm -rf $f
3177     fi
3178     m sudo -u $u ln -sf -T $target $f
3179   fi
3180 done
3181
3182
3183 # /etc/alias setup is debian specific, and exim postinst script sets up
3184 # an /etc/alias from root to the postmaster, based on the question
3185 # exim4-config exim4/dc_postmaster, as long as there exists an entry for
3186 # root, or there was no preexisting aliases file. postfix won\'t set up
3187 # a root to $postmaster alias if it\'s already installed. Easiest to
3188 # just set it ourselves.
3189
3190 # debconf question for postmaster:
3191 # Mail for the 'postmaster', 'root', and other system accounts needs to be redirected
3192 # to the user account of the actual system administrator.
3193 # If this value is left empty, such mail will be saved in /var/mail/mail, which is not
3194 # recommended.
3195 # Note that postmaster\'s mail should be read on the system to which it is directed,
3196 # rather than being forwarded elsewhere, so (at least one of) the users listed here
3197 # should not redirect their mail off this machine. A 'real-' prefix can be used to
3198 # force local delivery.
3199 # Multiple user names need to be separated by spaces.
3200 # Root and postmaster mail recipient:
3201
3202 m exit 0
3203 :
3204
3205 # Local Variables:
3206 # eval: (outline-minor-mode)
3207 # outline-regexp: "\\( *\\)# [*]\\{1,8\\} "
3208 # End:
3209 # this is combined with defining outline-level in init.el