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