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

   1 #!/bin/bash
   2 # * intro
   3 # Copyright (C) 2019 Ian Kelling
   4 # SPDX-License-Identifier: AGPL-3.0-or-later
   5
   6
   7 # todo: setup an alert for bouncing test emails.
   8
   9 # todo: bounces to my fsf mail can come from fsf@iankelling.org,
  10 # think about making bounces go from the original address.
  11
  12 # todo: add a prometheus alert for dovecot.
  13
  14 # todo: handle errors like this:
  15 # Mar 02 12:44:26 kw systemd[1]: exim4.service: Found left-over process 68210 (exim4) in control group while starting unit. Ignoring.
  16 # Mar 02 12:44:26 kw systemd[1]: This usually indicates unclean termination of a previous run, or service implementation deficiencies.
  17
  18 #  todo: harden dovecot. need to do some research. one way is for it to only listen on a wireguard vpn interface, so only clients that are on the vpn can access it.
  19 #  todo: consider hardening cups listening on 0.0.0.0
  20 #  todo: stop/disable local apache, and rpc.mountd, and kdeconnect when not in use.
  21
  22 # todo:  hosts should only allow external mail that is authed and
  23 # destined for backup route. it is a minor issue since traffic is
  24 # limited to the wghole network.
  25
  26 # todo: emailing info@amnimal.ninja produces a bounce, user doesn't exist
  27 # instead of a simple rejection like it should.
  28
  29 # todo: run mailping test after running, or otherwise
  30 # clear out terminal alert
  31
  32 # todo: disable postgrey
  33
  34 # todo: in testforward-check, we should also look
  35
  36 # todo: test that bounces dont help create valid mailtest-check
  37
  38 # todo: move mail stuff in distro-end into this file
  39
  40 # todo: consider rotating dkim & publishing key so every past email I sent
  41 # isnt necessarily signed
  42
  43 # todo: consider how to get clamav out of Debian-exim group
  44 # so it cant read/write the whole mail spool, for better
  45 # security.
  46
  47 # todo: create a cronjob to update or warn on expiring dnssec keys
  48
  49 # todo: we should test failed mail daily or so
  50 # failed cronjob, failed sysd-log-once,
  51 # a local bounce from a cronjob, a local bounce
  52 # to a bad remote address, perhaps a local failure
  53 # when the sending daemon is down.
  54 # And send an alert email if no alerts have been sent
  55 # in 2 or 3 days or something. todo, test cron mail on li.
  56
  57 # todo: look at mailinabox extra dns records, note these changelogs:
  58 # - An MTA-STS policy for incoming mail is now published (in DNS and over HTTPS) when the primary hostname and email address domain both have a signed TLS certificate installed, allowing senders to know that an encrypted connection should be enforced.
  59 # - The per-IP connection limit to the IMAP server has been doubled to allow more devices to connect at once, especially with multiple users behind a NAT.
  60 #
  61
  62 # todo: mailtest-check failure on remote hosts is not going to alert me.
  63 # sort that out.
  64 # todo: test mail failure as well as success.
  65 #
  66 # todo: validate that mailtest-check is doing dnsbl checks.
  67
  68 # background: I want to run exim in a network namespace so it can send
  69 # and receive through a vpn. This is needed so it can do ipv6, because
  70 # outside the namespace if we dont have ipv6, to send ipv6 through the
  71 # vpn, we have to send all our ipv6 through the vpn. I did this for a
  72 # long time, it was fine, but it causes various pains, like increased
  73 # latency, increased recaptcha because my ip is from a data center, just
  74 # various issues I dont want on all the time. The problem with the
  75 # namespace is that all kinds of programs want to invoke exim, but they
  76 # wont be in the namespace. I could replace exim with a wrapper that
  77 # jumps into the namespace, i tried that, it works fine.  One remaining
  78 # problem was that I would have needed to hook into exim upgrades to
  79 # move exim and replace it with my wrapper script. Also, my script to
  80 # join the namespace is not super reliable because it uses a pgrep.
  81 # Instead, I should have created a systemd service for a process that
  82 # will never die and just writes its pid somewhere convenient.
  83 # That implementation
  84 # is below here:
  85 #
  86 # sudoers:
  87 # user ALL=(ALL) /usr/sbin/exim4
  88 #
  89 # move exim4 to eximian, use this script for exim4:
  90 #
  91 # #!/bin/bash
  92 # if ip a show veth1-mail &>/dev/null; then
  93 #   /usr/sbin/eximian "$@"
  94 #   exit
  95 # fi
  96 # dosudo=false
  97 # if [[ $USER && $USER != root ]]; then
  98 #   dosudo=true
  99 # fi
 100 # pid=$(pgrep -f "/usr/sbin/openvpn .* --config /etc/openvpn/.*mail.conf")
 101 # if $dosudo; then
 102 #   sudo nsenter -t $pid -n -m sudo -u $USER /usr/sbin/eximian "$@"
 103 # else
 104 #   nsenter -t $pid -n -m /usr/sbin/eximian "$@"
 105 # fi
 106 # ## end script
 107 #
 108 # an alternate solution: there is a small setguid program for
 109 # network namespaces in my bookmarks.
 110 #
 111 # However, the solution I went with is: have 2 exim
 112 # configs. A nonstandard location for the daemon that runs
 113 # in the namespace. For all other invocations, it uses
 114 # the default config location, which is altered to be
 115 # in a smarthost config which sends mail to the deaemon.
 116 #
 117 # I have a bash function, enn to invoke exim like the daemon is running.
 118 # and mailbash to just enter its network namespace.
 119
 120 if [ -z "$BASH_VERSION" ]; then echo "error: shell is not bash" >&2; exit 1; fi
 121
 122 shopt -s nullglob
 123
 124 if [[ -s /usr/local/lib/err ]]; then
 125   source /usr/local/lib/err
 126 elif [[ -s /a/bin/errhandle/err ]]; then
 127   source /a/bin/errhandle/err
 128 else
 129   err "no err tracing script found"
 130 fi
 131 source /a/bin/distro-functions/src/identify-distros
 132 source /a/bin/distro-functions/src/package-manager-abstractions
 133
 134 # has nextcloud_admin_pass in it
 135 f=/p/c/machine_specific/$HOSTNAME/mail
 136 if [[ -e $f ]]; then
 137   # shellcheck source=/p/c/machine_specific/bk/mail
 138   source $f
 139 fi
 140
 141
 142 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
 143
 144 # note, this is hardcoded in /etc/exim4/conf.d/main/000_local
 145 u=$(id -nu 1000)
 146
 147
 148 usage() {
 149   cat <<EOF
 150 Usage: ${0##*/} anything_here_to_debug
 151 Setup exim4 & dovecot & related things
 152
 153 -h|--help  Print help and exit.
 154 EOF
 155   exit $1
 156 }
 157
 158 # debug output if we pass any arg
 159 if (( $# )); then
 160   set -x
 161 fi
 162
 163
 164 ####### instructions for icedove #####
 165 # Incoming mail server: mail.iankelling.org, port 143, username iank, connection security starttls, authentication method normal password,
 166 # then click advanced so it accepts it.
 167 # we could also just use 127.0.0.1 with no ssl
 168 #
 169 # hamburger -> preferences -> preferences -> advanced tab -> config editor button -> security.ssl.enable_ocsp_must_staple = false
 170 # background: dovecot does not yet have ocsp stapling support
 171 # reference: https://community.letsencrypt.org/t/simple-guide-using-lets-encrypt-ssl-certs-with-dovecot/2921
 172 #
 173 # for phone, k9mail, fdroid, same thing but username alerts, pass in ivy-pass.
 174 # also, bk.b8.nz for secondary alerts, username is iank. same alerts pass.
 175 # fetching mail settings: folder poll frequency 10 minutes.
 176 # account settings, fetching mail, push folders: All. Then disable the persistent notification.
 177 #######
 178
 179
 180 # * perstent password instructions
 181 # Note: for cert cron, we need to manually run first to accept known_hosts
 182
 183 # # exim passwords:
 184 # # for hosts which have all private files I just use the same user
 185 # # for other hosts, each one get\'s their own password.
 186 # # for generating secure pass, and storing for server too:
 187 # f=$(mktemp)
 188 # host=tp
 189 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$f
 190 # s sed -i "/^$host:/d" /p/c/filesystem/etc/exim4/passwd
 191 # echo "$host:$(mkpasswd -m sha-512 -s <$f)" >>/p/c/filesystem/etc/exim4/passwd
 192 # #reference: exim4_passwd_client(5)
 193 # dir=/p/c/machine_specific/$host/filesystem/etc/exim4
 194 # mkdir -p $dir
 195 # echo "mail.iankelling.org:$host:$(<$f)" > $dir/passwd.client
 196 # # then run this script
 197
 198 # # dovecot password, i just need 1 as I\'m the only user
 199 # mkdir /p/c/filesystem/etc/dovecot
 200 # echo "iank:$(doveadm pw -s SHA512-CRYPT)::::::" >>/p/c/filesystem/etc/dovecot/users
 201
 202 ####### end perstent password instructions ######
 203
 204
 205 # * dkim dns
 206 # # Remove 1 level of comments in this section, set the domain var
 207 # # for the domain you are setting up, then run this and copy dns settings
 208 # # into dns.
 209 # domain=iankelling.org
 210 # c /p/c/filesystem/etc/exim4
 211 # # this has several bugs addressed in comments, but it was helpful
 212 # # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
 213
 214 # openssl genrsa -out $domain-private.pem 2048
 215 # # Then, to get the public key strings to put in bind:
 216
 217 # # selector is needed for having multiple keys for one domain.
 218 # # I dun do that, so just use a static one: li
 219 # # Debadmin page does not have v=, fastmail does, and this
 220 # # says it\'s recommended in 3.6.1, default is DKIM1 anyways.
 221 # # https://www.ietf.org/rfc/rfc6376.txt
 222 # # Join and print all but first and last line.
 223 # # last line: swap hold & pattern, remove newlines, print.
 224 # # lines 2+: append to hold space
 225 # echo "bind txt record: remember to truncate $domain so its relative to the bind zone"
 226 # cat <<EOF
 227 # a._domainkey.$domain  TXT     (
 228 # "v=DKIM1\059 k=rsa\059 p=$(openssl rsa -in $domain-private.pem -pubout |&sed -rn '${x;s/\n//g;s/^(.*)(.{240}$)/\1"\n"\2/p};3,$H')" )
 229 # EOF
 230 # # sed explanation: skip the first few lines, then put them into the hold space, then
 231 # # on the last line, back to the patern space, remove the newlines, then add a newline
 232 # # at the last char - 240, because bind txt records need strings <=255 chars,
 233 # # other dkim stuff at the begining is is 25 chars, and the pubkey is 393, so this
 234 # # leaves us a bit of extra room at the end and a bunch at the beginning.
 235
 236 # # selector was also put into /etc/exim4/conf.d/main/000_local,
 237
 238 # * dmarc dns
 239
 240 # # 2017-02 dmarc policies:
 241 # # host -t txt _dmarc.gmail.com
 242 # # yahoo: p=reject, hotmail: p=none, gmail: p=none, fastmail none for legacy reasons
 243 # # there were articles claiming gmail would be  changing
 244 # # to p=reject, in early 2017, which didn\'t happen. I see no sources on them. It\'s
 245 # # expected to cause problems
 246 # # with a few old mailing lists, copying theirs for now.
 247 #
 248 # echo "dmarc dns, name: _dmarc value: v=DMARC1; p=none; rua=mailto:mailauth-reports@$domain"
 249
 250 # * other dns
 251
 252 # # 2017-02 spf policies:
 253 # # host -t txt lists.fedoraproject.org
 254 # # google ~all, hotmail ~all, yahoo: ?all, fastmail ?all, outlook ~all
 255 # # i include fastmail\'s settings, per their instructions,
 256 # # and follow their policy. In mail in a box, or similar instructions,
 257 # # I\'ve seen recommended to not use a restrictive policy.
 258
 259 # # to check if dns has updated, you do
 260 # host -a mesmtp._domainkey.$domain
 261
 262 # # mx records,
 263 # # setting it to iankelling.org would work the same, but this
 264 # # is more flexible, I could change where mail.iankelling.org pointed.
 265 # cat <<'EOF'
 266 # mx records, 2 records each, for * and empty domain
 267 # pri 10 mail.iankelling.org
 268 # EOF
 269
 270 # # dnssec
 271 # from brc2, run dnsecgen then dsign, update named.local.conf, publish keys to registrar
 272
 273 # * functions & constants
 274
 275 pre="${0##*/}:"
 276 m() { printf "$pre %s\n"  "$*"; "$@"; }
 277 e() { printf "$pre %s\n"  "$*"; }
 278 err() { printf "$pre %s\n"  "$*" >&2; exit 1; }
 279
 280 reload=false
 281 # This file is so if we fail in the middle and rerun, we dont lose state
 282 if [[ -e /var/local/mail-setup-reload ]]; then
 283   reload=true
 284 fi
 285 i() { # install file
 286   local tmp tmpdir dest="$1"
 287   local base="${dest##*/}"
 288   local dir="${dest%/*}"
 289   if [[ $dir != "$base" ]]; then
 290     mkdir -p ${dest%/*}
 291   fi
 292   ir=false # i result
 293   tmpdir=$(mktemp -d)
 294   cat >$tmpdir/"$base"
 295   tmp=$(rsync -ic $tmpdir/"$base" "$dest")
 296   if [[ $tmp ]]; then
 297     printf "%s\n" "$tmp"
 298     ir=true
 299     if [[ $dest == /etc/systemd/system/* ]]; then
 300       touch /var/local/mail-setup-reload
 301       reload=true
 302     fi
 303   fi
 304   rm -rf $tmpdir
 305 }
 306 setini() {
 307   key="$1" value="$2" section="$3"
 308   file="/etc/radicale/config"
 309   sed -ri "/ *\[$section\]/,/^ *\[[^]]+\]/{/^\s*${key}[[:space:]=]/d};/ *\[$section\]/a $key = $value" "$file"
 310 }
 311 soff () {
 312   for service; do
 313     # ignore services that dont exist
 314     if systemctl cat $service &>/dev/null; then
 315       m systemctl disable --now $service
 316     fi
 317   done
 318 }
 319 sre() {
 320   for service; do
 321     m systemctl restart $service
 322     m systemctl enable $service;
 323   done
 324 }
 325 mailhost() {
 326   [[ $HOSTNAME == "$MAIL_HOST" ]]
 327 }
 328 e() { printf "%s\n" "$*"; }
 329 reifactive() {
 330   for service; do
 331     if systemctl is-active $service >/dev/null; then
 332       m systemctl restart $service
 333     fi
 334   done
 335 }
 336 stopifactive() {
 337   for service; do
 338     if systemctl is-active $service >/dev/null; then
 339       m systemctl stop $service
 340     fi
 341   done
 342 }
 343
 344 mxhost=mx.iankelling.org
 345 mxport=587
 346 forward=$u@$mxhost
 347
 348 # old setup. left as comment for example
 349 # mxhost=mail.messagingengine.com
 350 # mxport=587
 351 # forward=ian@iankelling.org
 352
 353 smarthost="$mxhost::$mxport"
 354 uhome=$(eval echo ~$u)
 355
 356 # Somehow on one machine, a file got written with 664 perms.
 357 # just being defensive here.
 358 umask 0022
 359
 360 source /a/bin/bash_unpublished/source-state
 361 if [[ ! $MAIL_HOST ]]; then
 362   err "\$MAIL_HOST not set"
 363 fi
 364
 365 bhost_t=false
 366 case $HOSTNAME in
 367   $MAIL_HOST) : ;;
 368   kd|frodo|x2|x3|kw|sy|bo)
 369     bhost_t=true
 370     ;;
 371 esac
 372
 373
 374 # * Install universal packages
 375
 376
 377 # installs epanicclean iptables-exim ip6tables-exim
 378 /a/bin/ds/install-my-scripts
 379
 380 if [[ $(debian-codename-compat) == bionic ]]; then
 381   cat >/etc/apt/preferences.d/spamassassin <<'EOF'
 382 Package: spamassassin sa-compile spamc
 383 Pin: release n=focal,o=Ubuntu
 384 Pin-Priority: 500
 385 EOF
 386 fi
 387
 388 # light version of exim does not have sasl auth support.
 389 # note: for bitfolk hosts, unbound has important config with conflink.
 390 pi-nostart exim4 exim4-daemon-heavy spamassassin unbound clamav-daemon wireguard
 391
 392 # note: pyzor debian readme says you need to run some initialization command
 393 # but its outdated.
 394 pi spf-tools-perl p0f postgrey pyzor razor jq moreutils certbot fail2ban
 395 case $HOSTNAME in
 396   je) : ;;
 397   # not included due to using wireguard: openvpn
 398   *) pi wget git unzip iptables ;;
 399 esac
 400 # bad packages that sometimes get automatically installed
 401 pu openresolv resolvconf
 402
 403 soff openvpn
 404
 405
 406 if [[ $(debian-codename) == etiona ]]; then
 407   # ip6tables stopped loading on boot. openvpn has reduced capability set,
 408   # so running iptables as part of openvpn startup wont work. This should do it.
 409   pi iptables-persistent
 410   cat >/etc/iptables/rules.v6 <<'EOF'
 411 *mangle
 412 COMMIT
 413 *nat
 414 COMMIT
 415 EOF
 416   # load it now.
 417   m ip6tables -S >/dev/null
 418 fi
 419
 420 # our nostart pi fails to avoid enabling
 421
 422
 423 # * Mail clean cronjob
 424
 425 i /etc/systemd/system/mailclean.timer <<'EOF'
 426 [Unit]
 427 Description=Run mailclean daily
 428
 429 [Timer]
 430 OnCalendar=monthly
 431
 432 [Install]
 433 WantedBy=timers.target
 434 EOF
 435
 436 i /etc/systemd/system/mailclean.service <<EOF
 437 [Unit]
 438 Description=Delete and archive old mail files
 439 After=multi-user.target
 440
 441 [Service]
 442 User=$u
 443 Type=oneshot
 444 ExecStart=/usr/local/bin/sysd-mail-once mailclean /a/bin/distro-setup/mailclean
 445 EOF
 446
 447 # * postgrey
 448
 449
 450 i /etc/default/postgrey <<'EOF'
 451 POSTGREY_OPTS="--exim --unix=/var/run/postgrey/postgrey.sock --retry-window=4 --max-age=60"
 452 EOF
 453
 454 # * clamav
 455
 456 m usermod -a -G Debian-exim clamav
 457
 458 i /etc/systemd/system/clamav-daemon.service.d/fix.conf <<EOF
 459 [Service]
 460 ExecStartPre=-/bin/mkdir /var/run/clamav
 461 ExecStartPre=/bin/chown clamav /var/run/clamav
 462 EOF
 463
 464 # * mail vpn config
 465
 466 # old.
 467 #vpnser=mailvpn.service
 468 # todo: this hangs if it cant resolv the endpoint. we
 469 # want it to just retry in the background.
 470 vpnser=wg-quick@wgmail.service
 471
 472 case $HOSTNAME in
 473   $MAIL_HOST)
 474     rsync -aiSAX --chown=root:root --chmod=g-s /p/c/filesystem/etc/wireguard/ /etc/wireguard
 475     bindpaths="/etc/127.0.0.1-resolv:/run/systemd/resolve /etc/basic-nsswitch:/etc/resolved-nsswitch:norbind"
 476     ;;&
 477   bk)
 478     bindpaths="/etc/10.173.8.1-resolv:/etc/127.0.0.1-resolv"
 479     ;;&
 480   *)
 481     d=/p/c/machine_specific/$HOSTNAME/filesystem/etc/wireguard/
 482     if [[ -d $d ]]; then
 483       rsync -aiSAX --chown=root:root --chmod=g-s $d  /etc/wireguard
 484     fi
 485     ;;
 486 esac
 487
 488 case $HOSTNAME in
 489   li) : ;;
 490   *)
 491     i /etc/systemd/system/wg-quick@wgmail.service.d/override.conf <<EOF
 492 [Unit]
 493 Requires=mailnn.service
 494 JoinsNamespaceOf=mailnn.service
 495 BindsTo=mailnn.service
 496 StartLimitIntervalSec=0
 497
 498 [Service]
 499 PrivateNetwork=true
 500 # i dont think we need any of these, but it doesnt hurt to stay consistent
 501 BindPaths=$bindpaths
 502
 503 Restart=on-failure
 504 RestartSec=20
 505 EOF
 506     ;;
 507 esac
 508
 509
 510 # https://selivan.github.io/2017/12/30/systemd-serice-always-restart.html
 511 i /etc/systemd/system/mailvpn.service <<EOF
 512 [Unit]
 513 Description=OpenVPN tunnel for mail
 514 After=syslog.target network-online.target mailnn.service
 515 Wants=network-online.target
 516 Documentation=man:openvpn(8)
 517 Documentation=https://community.openvpn.net/openvpn/wiki/Openvpn24ManPage
 518 Documentation=https://community.openvpn.net/openvpn/wiki/HOWTO
 519 # needed to continually restatr
 520 JoinsNamespaceOf=mailnn.service
 521 BindsTo=mailnn.service
 522 StartLimitIntervalSec=0
 523
 524 [Service]
 525 Type=notify
 526 RuntimeDirectory=openvpn-client
 527 RuntimeDirectoryMode=0710
 528 WorkingDirectory=/etc/openvpn/client
 529 ExecStart=/usr/sbin/openvpn --suppress-timestamps --nobind --config /etc/openvpn/client/mail.conf
 530 #CapabilityBoundingSet=CAP_IPC_LOCK CAP_NET_ADMIN CAP_NET_RAW CAP_SETGID CAP_SETUID CAP_SYS_CHROOT CAP_DAC_OVERRIDE
 531 LimitNPROC=10
 532 # DeviceAllow=/dev/null rw
 533 # DeviceAllow=/dev/net/tun rw
 534 PrivateNetwork=true
 535 # in the network namespace, we cant connect to systemd-resolved on 127.0.0.53,
 536 # because of
 537 # https://unix.stackexchange.com/questions/445782/how-to-allow-systemd-resolved-to-listen-to-an-interface-other-than-loopback
 538 # there is a workaround there, but i dont think its really worth it,
 539 # the mail server is fine with a static dns anyways.
 540 # This thread is also interesting,
 541 # https://github.com/slingamn/namespaced-openvpn/issues/7
 542 # todo: the iptables rule at the bottom could be useful to prevent
 543 # dns from leaking in my network namespaced vpn.
 544 # I also like the idea of patching systemd-resolved so it
 545 # will listen on other interfaces, but its not worth my time.
 546 BindPaths=$bindpaths
 547 Restart=always
 548 # time to sleep before restarting a service
 549 RestartSec=20
 550
 551 [Install]
 552 WantedBy=multi-user.target
 553 EOF
 554
 555 i /etc/systemd/system/mailnnroute.service <<'EOF'
 556 [Unit]
 557 Description=Network routing for mailnn
 558 After=syslog.target network-online.target mailnn.service
 559 Wants=network-online.target
 560 JoinsNamespaceOf=mailnn.service
 561 BindsTo=mailnn.service
 562 StartLimitIntervalSec=0
 563
 564 [Service]
 565 Type=simple
 566 RemainAfterExit=true
 567 PrivateNetwork=true
 568 ExecStart=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns -n 10.173.8 start mail
 569 ExecStop=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns stop mail
 570 Restart=always
 571 RestartSec=20
 572
 573
 574 [Install]
 575 WantedBy=multi-user.target
 576 EOF
 577
 578 #
 579 i /etc/systemd/system/mailnn.service <<'EOF'
 580 [Unit]
 581 Description=Network Namespace for mail vpn service that will live forever and cant fail
 582 After=syslog.target network-online.target
 583 Wants=network-online.target
 584
 585 [Service]
 586 Type=simple
 587 PrivateNetwork=true
 588 ExecStart=/bin/sleep infinity
 589
 590 [Install]
 591 WantedBy=multi-user.target
 592 EOF
 593
 594 i /etc/systemd/system/mailbindwatchdog.service <<EOF
 595 [Unit]
 596 Description=Watchdog to restart services relying on systemd-resolved dir
 597 After=syslog.target network-online.target
 598 Wants=network-online.target
 599 BindsTo=mailnn.service
 600
 601 [Service]
 602 Type=simple
 603 ExecStart=/usr/local/bin/mailbindwatchdog $vpnser ${nn_progs[@]} unbound.service radicale.service
 604 Restart=always
 605 # time to sleep before restarting a service
 606 RestartSec=10
 607
 608 [Install]
 609 WantedBy=multi-user.target
 610 EOF
 611
 612
 613
 614 # old service name
 615 rm -fv /etc/systemd/system/openvpn-client-mail@.service
 616
 617 # We use a local unbound because systemd-resolved wont accept our
 618 # request, it will only listen to 127.0.0.53 in the main network
 619 # namespace, and rejected feature requests to change that (although I
 620 # could change the code and recompile), but anyways, that could answer
 621 # with things specific to the lan that aren't applicable in this
 622 # namespace, and since unbound is a recursive resolver, it means we just
 623 # use our own ip against dnsbl rate limits.
 624 #
 625 # If we ever notice this change, chattr +i on it
 626 # trust-ad is used in t10+, glibc 2.31
 627
 628 i /etc/127.0.0.1-resolv/stub-resolv.conf <<'EOF'
 629 nameserver 127.0.0.1
 630 options edns0 trust-ad
 631 EOF
 632
 633 i /etc/127.0.0.53-resolv/stub-resolv.conf <<'EOF'
 634 nameserver 127.0.0.53
 635 options edns0 trust-ad
 636 EOF
 637
 638
 639 i /etc/10.173.8.1-resolv/stub-resolv.conf <<'EOF'
 640 nameserver 10.173.8.1
 641 options edns0 trust-ad
 642 EOF
 643
 644 # this is just a bug fix for trisquel.
 645 f=/etc/apparmor.d/usr.sbin.unbound
 646 line="/usr/sbin/unbound flags=(attach_disconnected) {"
 647 if ! grep -qFx "$line" $f; then
 648   badline="/usr/sbin/unbound {"
 649   if ! grep -qFx "$badline" $f; then
 650     err expected line in $f not found
 651   fi
 652   sed -i "s,^$badline$,$line," $f
 653   if systemctl is-active apparmor &>/dev/null; then
 654     m systemctl reload apparmor
 655   fi
 656 fi
 657
 658 # note: anything added to nn_progs needs corresponding rm
 659 # down below in the host switch
 660 nn_progs=(exim4)
 661 if mailhost; then
 662   # Note dovecots lmtp doesnt need to be in the same nn to accept delivery.
 663   # Its in the nn so remote clients can connect to it.
 664   nn_progs+=(spamassassin dovecot)
 665 fi
 666
 667 case $HOSTNAME in
 668   $MAIL_HOST)
 669     # todo, should this be after vpn service
 670     i /etc/systemd/system/unbound.service.d/nn.conf <<EOF
 671 [Unit]
 672 After=mailnn.service
 673 JoinsNamespaceOf=mailnn.service
 674 BindsTo=mailnn.service
 675 StartLimitIntervalSec=0
 676
 677 [Service]
 678 PrivateNetwork=true
 679 # note the nsswitch bind is actually not needed for bk, but
 680 # its the same file so it does no harm.
 681 BindPaths=$bindpaths
 682
 683 Restart=always
 684 RestartSec=20
 685 EOF
 686
 687     # sooo, there are a few ways to get traffic from the mail network
 688     # namespace to go over the wghole.
 689     #
 690     #1: unify the mail vpn and wghole
 691     # into 1 network.  this seems simple and logical, so I'm doing it.
 692     # One general downside is tying things together, if I need to mess
 693     # with one thing, it breaks the other. Oh well for now.
 694     #
 695     # 2. We can route 10.5.3.0/24 out of the mail nn and nat it into wghole.
 696     #
 697     # 3. We can setup the routing to happen on li, which seemed like I
 698     # just needed to add 10.8.0.4/24 to AllowedIPs in at least the
 699     # wghole clients, but I think that is kind of hacky and breaks ipv4
 700     # routing within the mailvpn, it happened to work just because exim
 701     # prefers ipv6 and that was also available in the mailvpn.
 702     #
 703     # 4. Put the hole interface into the mail network namespace. This
 704     # doesn't work if the mail vpn is wg.  For openvpn, it bypasses the
 705     # vpn routing and establishes a direct connection.  I only use the
 706     # hole vpn for randomish things, it should be fine to join the mail
 707     # nn for that. There should be some way to fix the routing issue
 708     # by doing manual routing, but that doesn't seem like a good use of time.
 709     # relevant:
 710     # https://www.wireguard.com/netns/#
 711     #
 712     # for wireguard debugging
 713     # echo module wireguard +p > /sys/kernel/debug/dynamic_debug/control
 714     # dmesg -w
 715
 716     ;;&
 717   $MAIL_HOST|bk)
 718     for unit in ${nn_progs[@]}; do
 719       i /etc/systemd/system/$unit.service.d/nn.conf <<EOF
 720 [Unit]
 721
 722 # Wants appears better than requires because with requires,
 723 # if the vpnser fails to start, this service won't get run at
 724 # all, even if the vpnser starts on an automatic restart.
 725
 726 Wants=$vpnser
 727 After=network.target mailnn.service $vpnser
 728 JoinsNamespaceOf=mailnn.service
 729 BindsTo=mailnn.service
 730 StartLimitIntervalSec=0
 731
 732 [Service]
 733 PrivateNetwork=true
 734 # note the nsswitch bind is actually not needed for bk, but
 735 # its the same file so it does no harm.
 736 BindPaths=$bindpaths
 737
 738 Restart=always
 739 RestartSec=20
 740 EOF
 741     done
 742     ;;
 743   *)
 744     for unit in exim4 spamassassin dovecot unbound; do
 745       f=/etc/systemd/system/$unit.service.d/nn.conf
 746       if [[ -s $f ]]; then
 747         rm -fv $f
 748         reload=true
 749       fi
 750     done
 751     ;;
 752 esac
 753
 754 # * spamassassin config
 755 i /etc/sysctl.d/80-iank-mail.conf <<'EOF'
 756 # see exim spec
 757 net.netfilter.nf_conntrack_tcp_timeout_close_wait = 120
 758 EOF
 759 if $ir; then
 760   m sysctl -p
 761 fi
 762
 763 i /etc/spamassassin/mylocal.cf <<'EOF'
 764 # this is mylocal.cf because the normal local.cf has a bunch of upstream stuff i dont want to mess with
 765
 766 # /usr/share/doc/exim4-base/README.Debian.gz:
 767 #   SpamAssassin's default report should not be used in a add_header
 768 #   statement since it contains empty lines. (This triggers e.g. Amavis'
 769 #   warning "BAD HEADER SECTION, Improper folded header field made up
 770 #   entirely of whitespace".) This is a safe, terse alternative:
 771 clear_report_template
 772 report (_SCORE_ / _REQD_ requ) _TESTSSCORES(,)_ autolearn=_AUTOLEARN
 773 uridnsbl_skip_domain iankelling.org
 774 uridnsbl_skip_domain amnimal.ninja
 775 uridnsbl_skip_domain expertpathologyreview.com
 776 uridnsbl_skip_domain zroe.org
 777 EOF
 778
 779 # 2020-10-19 remove old file. remove this when all hosts updated
 780 rm -fv /etc/systemd/system/spamddnsfix.{timer,service}
 781
 782 i /etc/default/spamassassin <<'EOF'
 783 # defaults plus debugging flags for an issue im having
 784 OPTIONS="--create-prefs --max-children 5 --helper-home-dir"
 785 PIDFILE="/var/run/spamd.pid"
 786 # my additions
 787 NICE="--nicelevel 15"
 788 CRON=1
 789 EOF
 790 #####   end spamassassin config
 791
 792
 793 # * Update mail cert
 794 if [[ -e /p/c/filesystem ]]; then
 795   # note, man openvpn implies we could just call mail-route on vpn startup/shutdown with
 796   # systemd, buuut it can remake the tun device unexpectedly, i got this in the log
 797   # after my internet was down for a bit:
 798   # NOTE: Pulled options changed on restart, will need to close and reopen TUN/TAP device.
 799   m /a/exe/vpn-mk-client-cert -b mailclient -n mail li.iankelling.org
 800 fi
 801
 802 # With openvpn, I didn't get around to persisting the openvpn
 803 # cert/configs into /p/c/machine_specific/bk, so I had this case to
 804 # manually get the cert. However, we aren't using openvpn anymore, so it
 805 # is commented out.
 806 #
 807 # case $HOSTNAME in
 808 #   bk)
 809 #     if [[ ! -e /etc/openvpn/client/mail.conf ]]; then
 810 #       echo "$0: error: first, on a system with /p/c/filesystem, run mail-setup, or the vpn-mk-client-cert line above this err" 2>&2
 811 #       exit 1
 812 #     fi
 813 #     ;;
 814 # esac
 815
 816 m rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/mail-cert-cron /usr/local/bin
 817
 818 i /etc/systemd/system/mailcert.service <<'EOF'
 819 [Unit]
 820 Description=Mail cert rsync
 821 After=multi-user.target
 822
 823 [Service]
 824 Type=oneshot
 825 ExecStart=/usr/local/bin/sysd-mail-once mailcert /usr/local/bin/mail-cert-cron
 826 EOF
 827 i /etc/systemd/system/mailcert.timer <<'EOF'
 828 [Unit]
 829 Description=Run mail-cert once a day
 830
 831 [Timer]
 832 OnCalendar=daily
 833
 834 [Install]
 835 WantedBy=timers.target
 836 EOF
 837
 838
 839 wghost=${HOSTNAME}wg.b8.nz
 840 if $bhost_t && [[ ! -e /etc/exim4/certs/$wghost/privkey.pem ]]; then
 841   certbot -n --manual-public-ip-logging-ok --eff-email --agree-tos -m letsencrypt@iankelling.org \
 842           certonly --manual --preferred-challenges=dns \
 843           --manual-auth-hook /a/bin/ds/le-dns-challenge \
 844           --manual-cleanup-hook /a/bin/ds/le-dns-challenge-cleanup \
 845           --deploy-hook /a/bin/ds/le-exim-deploy -d $wghost
 846 fi
 847
 848 # * fail2ban
 849
 850 # todo: test that these configs actually work, eg run
 851 # s iptables-exim -S
 852 # and see someone is banned.
 853
 854 sed 's/^ *before *= *iptables-common.conf/before = iptables-common-exim.conf/' \
 855     /etc/fail2ban/action.d/iptables-multiport.conf| i /etc/fail2ban/action.d/iptables-exim.conf
 856 i /etc/fail2ban/action.d/iptables-common-exim.conf <<'EOF'
 857 # iank: same as iptables-common, except iptables is iptables-exim, ip6tables is ip6tables-exim
 858
 859 # Fail2Ban configuration file
 860 #
 861 # Author: Daniel Black
 862 #
 863 # This is a included configuration file and includes the definitions for the iptables
 864 # used in all iptables based actions by default.
 865 #
 866 # The user can override the defaults in iptables-common.local
 867 #
 868 # Modified: Alexander Koeppe <format_c@online.de>, Serg G. Brester <serg.brester@sebres.de>
 869 #       made config file IPv6 capable (see new section Init?family=inet6)
 870
 871 [INCLUDES]
 872
 873 after = iptables-blocktype.local
 874         iptables-common.local
 875 # iptables-blocktype.local is obsolete
 876
 877 [Definition]
 878
 879 # Option:  actionflush
 880 # Notes.:  command executed once to flush IPS, by shutdown (resp. by stop of the jail or this action)
 881 # Values:  CMD
 882 #
 883 actionflush = <iptables> -F f2b-<name>
 884
 885
 886 [Init]
 887
 888 # Option:  chain
 889 # Notes    specifies the iptables chain to which the Fail2Ban rules should be
 890 #          added
 891 # Values:  STRING  Default: INPUT
 892 chain = INPUT
 893
 894 # Default name of the chain
 895 #
 896 name = default
 897
 898 # Option:  port
 899 # Notes.:  specifies port to monitor
 900 # Values:  [ NUM | STRING ]  Default:
 901 #
 902 port = ssh
 903
 904 # Option:  protocol
 905 # Notes.:  internally used by config reader for interpolations.
 906 # Values:  [ tcp | udp | icmp | all ] Default: tcp
 907 #
 908 protocol = tcp
 909
 910 # Option:  blocktype
 911 # Note:    This is what the action does with rules. This can be any jump target
 912 #          as per the iptables man page (section 8). Common values are DROP
 913 #          REJECT, REJECT --reject-with icmp-port-unreachable
 914 # Values:  STRING
 915 blocktype = REJECT --reject-with icmp-port-unreachable
 916
 917 # Option:  returntype
 918 # Note:    This is the default rule on "actionstart". This should be RETURN
 919 #          in all (blocking) actions, except REJECT in allowing actions.
 920 # Values:  STRING
 921 returntype = RETURN
 922
 923 # Option:  lockingopt
 924 # Notes.:  Option was introduced to iptables to prevent multiple instances from
 925 #          running concurrently and causing irratic behavior.  -w was introduced
 926 #          in iptables 1.4.20, so might be absent on older systems
 927 #          See https://github.com/fail2ban/fail2ban/issues/1122
 928 # Values:  STRING
 929 lockingopt = -w
 930
 931 # Option:  iptables
 932 # Notes.:  Actual command to be executed, including common to all calls options
 933 # Values:  STRING
 934 iptables = /usr/local/bin/iptables-exim <lockingopt>
 935
 936
 937 [Init?family=inet6]
 938
 939 # Option:  blocktype (ipv6)
 940 # Note:    This is what the action does with rules. This can be any jump target
 941 #          as per the iptables man page (section 8). Common values are DROP
 942 #          REJECT, REJECT --reject-with icmp6-port-unreachable
 943 # Values:  STRING
 944 blocktype = REJECT --reject-with icmp6-port-unreachable
 945
 946 # Option:  iptables (ipv6)
 947 # Notes.:  Actual command to be executed, including common to all calls options
 948 # Values:  STRING
 949 iptables = /usr/local/bin/ip6tables-exim <lockingopt>
 950 EOF
 951
 952 i /etc/fail2ban/jail.d/exim.local <<'EOF'
 953 [exim]
 954 enabled  = true
 955 port     = 25,587
 956 filter   = exim
 957 banaction = iptables-exim
 958
 959 # 209.51.188.13 = mail.fsf.org
 960 # 2001:470:142::13 = mail.fsf.org
 961 # 209.51.188.92 = eggs.gnu.org
 962 # 2001:470:142:3::10 = eggs.gnu.org
 963 # 72.14.176.105 2600:3c00:e000:280::2 = mail.iankelling.org
 964 # 10.173.8.1 = non-nn net
 965 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
 966 EOF
 967 if $ir; then
 968   m systemctl restart fail2ban
 969 fi
 970
 971 # * common exim4 config
 972
 973
 974 ## old, not using forward files anymore
 975 rm -fv $uhome/.forward /root/.forward
 976
 977
 978 # Make all system users be aliases. preventative
 979 # prevents things like cron mail for user without alias
 980 awk 'BEGIN { FS = ":" } ; $6 !~ /^\/home/ || $7 ~ /\/nologin$/  { print $1 }' /etc/passwd| while read -r user; do
 981   if [[ ! $user ]]; then
 982     continue
 983   fi
 984   if ! grep -q "^$user:" /etc/aliases; then
 985     echo "$user: root" |m tee -a /etc/aliases
 986   fi
 987 done
 988
 989
 990 awk 'BEGIN { FS = ":" } ; $6 ~ /^\/home/ && $7 !~ /\/nologin$/ { print $1 }' /etc/passwd| while read -r user; do
 991   case $HOSTNAME in
 992     $MAIL_HOST)
 993       sed -i "/^user:/d" /etc/aliases
 994       ;;
 995     *)
 996       if ! grep -q "^$user:" /etc/aliases; then
 997         echo "$user: root" |m tee -a /etc/aliases
 998       fi
 999       ;;
1000   esac
1001 done
1002
1003 if ! grep -q "^ncsoft:" /etc/aliases; then
1004   echo "ncsoft: graceq2323@gmail.com" |m tee -a /etc/aliases
1005 fi
1006
1007
1008
1009 m gpasswd -a iank adm #needed for reading logs
1010
1011 ### make local bounces go to normal maildir
1012 # local mail that bounces goes to /Maildir or /root/Maildir
1013 dirs=(/m/md/bounces/{cur,tmp,new})
1014 m mkdir -p ${dirs[@]}
1015 m chown iank:iank /m /m/md
1016 m ln -sfT /m/md /m/iank
1017 m chmod 771 /m /m/md
1018 m chown -R $u:Debian-exim /m/md/bounces
1019 m chmod 775 ${dirs[@]}
1020 m usermod -a -G Debian-exim $u
1021 for d in /Maildir /root/Maildir; do
1022   if [[ ! -L $d ]]; then
1023     m rm -rf $d
1024   fi
1025   m ln -sf -T /m/md/bounces $d
1026 done
1027
1028 # dkim, client passwd file
1029 files=(/p/c/machine_specific/$HOSTNAME/filesystem/etc/exim4/*)
1030 f=/p/c/filesystem/etc/exim4/passwd.client
1031 if [[ -e $f ]]; then
1032   files+=($f)
1033 fi
1034 if (( ${#files[@]} )); then
1035   m rsync -ahhi --chown=root:Debian-exim --chmod=0640 \
1036     ${files[@]} /etc/exim4
1037 fi
1038
1039 # By default, only 10 days of logs are kept. increase that.
1040 # And dont compress, I look back at logs too often and
1041 # dont need the annoyance of decompressing them all the time.
1042 m sed -ri '/^\s*compress\s*$/d;s/^(\s*rotate\s).*/\11000/' /etc/logrotate.d/exim4-base
1043 files=(/var/log/exim4/*.gz)
1044 if (( ${#files[@]} )); then
1045   gunzip ${files[@]}
1046 fi
1047
1048 ## disabled. not using .forward files, but this is still interesting
1049 ## for reference.
1050 # ## https://blog.dhampir.no/content/make-exim4-on-debian-respect-forward-and-etcaliases-when-using-a-smarthost
1051 # # i only need .forwards, so just doing that one.
1052 # cd /etc/exim4/conf.d/router
1053 # b=userforward_higher_priority
1054 # # replace the router name so it is unique
1055 # sed -r s/^\\S+:/$b:/ 600_exim4-config_userforward >175_$b
1056 rm -fv /etc/exim4/conf.d/router/175_userforward_higher_priority
1057
1058 # todo, consider 'separate' in etc/exim4.conf, could it help on busy systems?
1059
1060 # alerts is basically the postmaster address
1061 m sed -i --follow-symlinks -f - /etc/aliases <<EOF
1062 \$a root: alerts@iankelling.org
1063 /^root:/d
1064 EOF
1065
1066 cat >/etc/exim4/conf.d/rewrite/34_iank_rewriting <<'EOF'
1067 ncsoft@zroe.org graceq2323@gmail.com hE
1068 EOF
1069
1070 # old name
1071 rm -fv /etc/exim4/conf.d/retry/37_retry
1072
1073 cat >/etc/exim4/conf.d/retry/17_retry <<'EOF'
1074 # Retry fast for my own domains
1075 iankelling.org * F,1d,4m;F,14d,1h
1076 amnimal.ninja * F,1d,4m;F,14d,1h
1077 expertpathologyreview.com * F,1d,4m;F,14d,1h
1078 je.b8.nz * F,1d,4m;F,14d,1h
1079 zroe.org * F,1d,4m;F,14d,1h
1080 eximbackup.b8.nz * F,1d,4m;F,14d,1h
1081
1082 # The spec says the target domain will be used for temporary host errors,
1083 # but i've found that isn't correct, the hostname is required
1084 # at least sometimes.
1085 nn.b8.nz * F,1d,4m;F,14d,1h
1086 defaultnn.b8.nz * F,1d,4m;F,14d,1h
1087 mx.iankelling.org * F,1d,4m;F,14d,1h
1088 bk.b8.nz * F,1d,4m;F,14d,1h
1089 eggs.gnu.org * F,1d,4m;F,14d,1h
1090 fencepost.gnu.org * F,1d,4m;F,14d,1h
1091
1092 # afaik our retry doesnt need this, but just using everything
1093 mx.amnimal.ninja * F,1d,4m;F,14d,1h
1094 mx.expertpathologyreview.com * F,1d,4m;F,14d,1h
1095
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 EOF
1190
1191 rm -fv /etc/exim4/rcpt_local_acl # old path
1192
1193 i /etc/exim4/conf.d/local_deny_exceptions_acl <<'EOF'
1194 # This acl already exists in rcpt, this just makes it more widespread.
1195 # See the comment there for its rationale. The reason it needs to be
1196 # more widespread is that I've turned on sender verification, but cron
1197 # emails can fail sender verification since I may be in a network that
1198 # doesn't have my local dns.
1199 accept
1200   authenticated = *
1201
1202 # i setup a local programs smtp to mail.iankelling.org, this
1203 # skips sender verification for it.
1204 accept
1205   hosts = 10.173.8.1
1206 EOF
1207
1208 rm -fv /etc/exim4/data_local_acl # old path
1209
1210 i /etc/exim4/conf.d/data_local_acl <<'EOF'
1211 # Except for the "condition =", this was
1212 # a comment in the check_data acl. The comment about this not
1213 # being suitable has been changed in newer exim versions. The only thing
1214 # related I found was to
1215 # add the condition =, cuz spamassassin has problems with big
1216 # messages and spammers don't bother with big messages,
1217 # but I've increased the size from 10k
1218 # suggested in official docs, and 100k in the wiki example because
1219 # those docs are rather old and I see a 110k spam message
1220 # pretty quickly looking through my spam folder.
1221
1222 warn
1223   !hosts = +iank_trusted
1224   remove_header = X-Spam_score: X-Spam_score_int : X-Spam_bar : X-Spam_report
1225
1226 warn
1227   !hosts = +iank_trusted
1228   # They dont send spam, but needed this because
1229   # smarthosts connect with residential ips and thus get flagged as spam.
1230   !authenticated = plain_server:login_server
1231   condition = ${if < {$message_size}{5000K}}
1232   spam = Debian-exim:true
1233   add_header = X-Spam_score_int: $spam_score_int
1234   add_header = X-Spam_score: $spam_score
1235   add_header = X-Spam_bar: $spam_bar
1236   add_header = X-Spam_report: $spam_report
1237   add_header = X-Spam_action: $spam_action
1238
1239 warn
1240   !authenticated = plain_server:login_server
1241   condition = ${if def:malware_name}
1242   remove_header = Subject:
1243   add_header = Subject: [Clamav warning: $malware_name] $h_subject
1244   log_message = heuristic malware warning: $malware_name
1245
1246 #accept
1247 #  spf = pass:fail:softfail:none:neutral:permerror:temperror
1248 #  dmarc_status = reject:quarantine
1249 #  add_header = Reply-to: dmarctest@iankelling.org
1250
1251 EOF
1252
1253 i /etc/exim4/conf.d/router/900_exim4-config_local_user <<'EOF'
1254 ### router/900_exim4-config_local_user
1255 #################################
1256
1257 # This router matches local user mailboxes. If the router fails, the error
1258 # message is "Unknown user".
1259 local_user:
1260   debug_print = "R: local_user for $local_part@$domain"
1261   driver = accept
1262   domains = +local_domains
1263 # ian: default file except where mentioned.
1264 # ian: commented this. I get all local parts. for bk, an rcpt
1265 # check handles checking with dovecot, and the only router
1266 # after this is root.
1267 #  local_parts = ! root
1268   transport = LOCAL_DELIVERY
1269   cannot_route_message = Unknown user
1270 # ian: added for + addressing.
1271   local_part_suffix = +*
1272   local_part_suffix_optional
1273 EOF
1274 i /etc/exim4/conf.d/transport/30_exim4-config_dovecot_lmtp <<'EOF'
1275 dovecot_lmtp:
1276   driver = lmtp
1277   socket = /var/run/dovecot/lmtp
1278   #maximum number of deliveries per batch, default 1
1279   batch_max = 200
1280   envelope_to_add
1281 EOF
1282
1283 i /etc/exim4/conf.d/transport/30_remote_smtp_vpn <<'EOF'
1284 # same as debians 30_exim4-config_remote_smtp, but
1285 # with interface added at the end.
1286
1287 remote_smtp_vpn:
1288   debug_print = "T: remote_smtp_vpn for $local_part@$domain"
1289   driver = smtp
1290 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
1291   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
1292 .endif
1293 .ifdef REMOTE_SMTP_HOSTS_AVOID_TLS
1294   hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
1295 .endif
1296 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1297   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1298 .endif
1299 .ifdef REMOTE_SMTP_RETURN_PATH
1300   return_path = REMOTE_SMTP_RETURN_PATH
1301 .endif
1302 .ifdef REMOTE_SMTP_HELO_DATA
1303   helo_data=REMOTE_SMTP_HELO_DATA
1304 .endif
1305 .ifdef DKIM_DOMAIN
1306 dkim_domain = DKIM_DOMAIN
1307 .endif
1308 .ifdef DKIM_SELECTOR
1309 dkim_selector = DKIM_SELECTOR
1310 .endif
1311 .ifdef DKIM_PRIVATE_KEY
1312 dkim_private_key = DKIM_PRIVATE_KEY
1313 .endif
1314 .ifdef DKIM_CANON
1315 dkim_canon = DKIM_CANON
1316 .endif
1317 .ifdef DKIM_STRICT
1318 dkim_strict = DKIM_STRICT
1319 .endif
1320 .ifdef DKIM_SIGN_HEADERS
1321 dkim_sign_headers = DKIM_SIGN_HEADERS
1322 .endif
1323 .ifdef TLS_DH_MIN_BITS
1324 tls_dh_min_bits = TLS_DH_MIN_BITS
1325 .endif
1326 .ifdef REMOTE_SMTP_TLS_CERTIFICATE
1327 tls_certificate = REMOTE_SMTP_TLS_CERTIFICATE
1328 .endif
1329 .ifdef REMOTE_SMTP_PRIVATEKEY
1330 tls_privatekey = REMOTE_SMTP_PRIVATEKEY
1331 .endif
1332 .ifdef REMOTE_SMTP_HOSTS_REQUIRE_TLS
1333   hosts_require_tls = REMOTE_SMTP_HOSTS_REQUIRE_TLS
1334 .endif
1335 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1336   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1337 .endif
1338   interface = <; 10.8.0.4 ; 2600:3c00:e002:3800::4
1339 EOF
1340
1341 i /etc/exim4/conf.d/transport/30_smarthost_dkim <<'EOF'
1342 # ian: this is remote_smtp_smarthost plus the dkim parts from remote_smtp
1343
1344 smarthost_dkim:
1345   debug_print = "T: remote_smtp_smarthost for $local_part@$domain"
1346   driver = smtp
1347   multi_domain
1348 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
1349   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
1350 .endif
1351   hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \
1352         {\
1353         ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\
1354         }\
1355         {} \
1356       }
1357 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1358   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1359 .endif
1360 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1361   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1362 .endif
1363 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1364   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1365 .endif
1366 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1367   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
1368 .endif
1369 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1370   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1371 .endif
1372 .ifdef REMOTE_SMTP_RETURN_PATH
1373   return_path = REMOTE_SMTP_RETURN_PATH
1374 .endif
1375 .ifdef REMOTE_SMTP_HELO_DATA
1376   helo_data=REMOTE_SMTP_HELO_DATA
1377 .endif
1378 .ifdef TLS_DH_MIN_BITS
1379 tls_dh_min_bits = TLS_DH_MIN_BITS
1380 .endif
1381 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1382 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1383 .endif
1384 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1385 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1386 .endif
1387 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1388   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1389 .endif
1390 .ifdef DKIM_DOMAIN
1391 dkim_domain = DKIM_DOMAIN
1392 .endif
1393 .ifdef DKIM_SELECTOR
1394 dkim_selector = DKIM_SELECTOR
1395 .endif
1396 .ifdef DKIM_PRIVATE_KEY
1397 dkim_private_key = DKIM_PRIVATE_KEY
1398 .endif
1399 .ifdef DKIM_CANON
1400 dkim_canon = DKIM_CANON
1401 .endif
1402 .ifdef DKIM_STRICT
1403 dkim_strict = DKIM_STRICT
1404 .endif
1405 .ifdef DKIM_SIGN_HEADERS
1406 dkim_sign_headers = DKIM_SIGN_HEADERS
1407 .endif
1408 EOF
1409
1410
1411 cat >/etc/exim4/update-exim4.conf.conf  <<'EOF'
1412 # default stuff, i havent checked if its needed
1413 dc_minimaldns='false'
1414 dc_relay_nets=''
1415 CFILEMODE='644'
1416 dc_use_split_config='true'
1417 dc_mailname_in_oh='true'
1418 EOF
1419
1420
1421 # * radicale
1422 if mailhost; then
1423   if ! mountpoint /o; then
1424     echo "error /o is not a mountpoint" >&2
1425     exit 1
1426   fi
1427
1428   # davx/davdroid setup instructions at the bottom
1429
1430   # main docs:
1431   # http://radicale.org/user_documentation/
1432   # https://davdroid.bitfire.at/configuration/
1433
1434   # note on debugging: if radicale can't bind to the address,
1435   # in the log it just says "Starting Radicale". If you run
1436   # it in the foreground, it will give more info. Background
1437   # plus debug does not help.
1438   # sudo -u radicale radicale -D -f
1439
1440   # created password file with:
1441   # htpasswd -c /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1442   # chmod 640 /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1443   # # setup chgrp www-data in ./conflink
1444
1445   pi-nostart radicale
1446
1447   i /etc/systemd/system/radicale.service.d/override.conf <<EOF
1448 [Unit]
1449
1450 After=network.target network-online.target mailnn.service $vpnser
1451
1452 Wants=$vpnser
1453 JoinsNamespaceOf=mailnn.service
1454 StartLimitIntervalSec=0
1455
1456 [Service]
1457 PrivateNetwork=true
1458 BindPaths=$bindpaths
1459 Restart=always
1460 # time to sleep before restarting a service
1461 RestartSec=20
1462
1463 [Install]
1464 # for openvpn
1465 RequiredBy=$vpnser
1466 EOF
1467
1468
1469   # use persistent uid/gid
1470   IFS=:; read -r _ _ uid _ < <(getent passwd radicale ); unset IFS
1471   IFS=:; read -r _ _ gid _ < <(getent group radicale ); unset IFS
1472   if [[ $uid != 609 ]]; then
1473     m systemctl stop radicale ||:
1474     m usermod -u 609 radicale
1475     m groupmod -g 609 radicale
1476     m usermod -g 609 radicale
1477   fi
1478   m find /o/radicale  -xdev -exec chown -h 609 {} +
1479   m find /o/radicale -xdev -exec chgrp -h 609 {} +
1480
1481
1482   # I moved /var/lib/radicale after it's initialization.
1483   # I did a sudo -u radicale git init in the collections subfolder
1484   # after it gets created, per the git docs.
1485   m /a/exe/lnf -T /o/radicale /var/lib/radicale
1486
1487   # from https://www.williamjbowman.com/blog/2015/07/24/setting-up-webdav-caldav-and-carddav-servers/
1488
1489   # more config is for li in distro-end
1490
1491   # coment in this file says this is needed for it to run on startup
1492   sed -ri 's/^\s*#+\s*(ENABLE_RADICALE\s*=\s*yes\s*)/\1/' /etc/default/radicale
1493
1494   # comments say default is 0.0.0.0:5232
1495   m setini hosts 10.8.0.4:5232 server
1496   # https://radicale.org/2.1.html
1497   m setini type http_x_remote_user auth
1498
1499
1500   # disable power management feature, set to 240 min sync interval,
1501   # so it shouldn't be bad.
1502
1503   # davdroid from f-druid.
1504   # login with url and user name
1505   # url https://cal.iankelling.org/ian
1506   # username ian
1507   # pass, see password manager for radicale
1508   #
1509   # add account dialog:
1510   #
1511   # set account name as ian@iankelling.org, per help text below the
1512   # field.
1513   #
1514   # switch to groups are per-contact categories,
1515   # per https://davdroid.bitfire.at/configuration/radicale/
1516   #
1517   #
1518   # After setting up account, I added one address book, named
1519   # ianaddr. calender was already created, named ian. checked boxes under
1520   # both. synced.
1521   #
1522   # To restore from old phone to new phone, I wiped all data out, then copied over the newly created files. I think
1523   #
1524   # ignorable background info:
1525   #
1526   # opentasks uses the calendar file.
1527   #
1528   # The address book I created got a uuid as a name for the file. Note
1529   # the .props file says if it's a calendar or addressbook.
1530   #
1531   # When debugging, tailed /var/log/radicale/radicale.log and apache log,
1532   # both show the requests happening. Without creating the address book,
1533   # after creating a contact, a sync would delete it.
1534   #
1535   # Address books correspond to .props files in the radicale dir.
1536   #
1537   #  Some background is here,
1538   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1539   # which shows separate vcard option is from rfc 6350, the other is 2426,
1540   # radicale page says it implements the former not the latter,
1541   # which conflicts with the documentation of which to select, but whatever.
1542   # http://radicale.org/technical_choices/
1543   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1544   #
1545   # Note, url above says only cayanogenmod 13+ and omnirom can manage groups.
1546
1547   # Note, radicale had built-in git support to track changes, but they
1548   # removed it in 2.0.
1549
1550 fi
1551
1552 # * dovecot
1553
1554 # ** $MAIL_HOST|bk|je)
1555 case $HOSTNAME in
1556   $MAIL_HOST|bk|je)
1557     # based on a little google and package search, just the dovecot
1558     # packages we need instead of dovecot-common.
1559     #
1560     # dovecot-lmtpd is for exim to deliver to dovecot instead of maildir
1561     # directly.  The reason to do this is to use dovecot\'s sieve, which
1562     # can generally do more than exims filters (a few things less) and
1563     # sieve has the benefit of being supported in postfix and
1564     # proprietary/weird environments, so there is more examples on the
1565     # internet.
1566     pi-nostart dovecot-core dovecot-imapd dovecot-sieve dovecot-lmtpd dovecot-sqlite sqlite3
1567
1568     for f in /p/c{/machine_specific/$HOSTNAME,}/filesystem/etc/dovecot/users; do
1569       if [[ -e $f ]]; then
1570         m rsync -ahhi --chown=root:dovecot --chmod=0640 $f /etc/dovecot/
1571         break
1572       fi
1573     done
1574     for f in /p/c/subdir_files/sieve/*sieve /a/bin/ds/subdir_files/sieve/*sieve; do
1575       m sudo -u $u /a/exe/lnf -v -T $f $uhome/sieve/${f##*/}
1576     done
1577
1578     # https://wiki.dovecot.org/SSL/DovecotConfiguration
1579     i /etc/dovecot/dhparam <<'EOF'
1580 -----BEGIN DH PARAMETERS-----
1581 MIIBCAKCAQEAoleil6SBxGqQKk7j0y2vV3Oklv6XupZKn7PkPv485QuFeFagifeS
1582 A+Jz6Wquqk5zhGyCu63Hp4wzGs4TyQqoLjkaWL6Ra/Bw3g3ofPEzMGEsV1Qdqde4
1583 jorwiwtr2i9E6TXQp0noT/7VFeHulIkayTeW8JulINdMHs+oLylv16McGCIrxbkM
1584 8D1PuO0TP/CNDs2QbRvJ1RjY3CeGpxMhrSHVgBCUMwnA2cvz3bYjI7UMYMMDPNrE
1585 PLrwsYzXGGCdJsO2vsmmqqgLsZiapYJlUNjfiyWLt7E2H6WzkNB3VIhIPfLqFDPK
1586 xioE3sYKdjOt+p6mlg3l8+OLtODEFPHDqwIBAg==
1587 -----END DH PARAMETERS-----
1588 EOF
1589     {
1590
1591       if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
1592         cat <<'EOF'
1593 ssl_cert = </etc/exim4/fullchain.pem
1594 ssl_key = </etc/exim4/privkey.pem
1595 EOF
1596       else
1597         # We have a lets encrypt hooks that puts things here.
1598         # This is just for bk, which uses the vpn cert in exim
1599         # for sending mail, but the local hostname cert for
1600         # dovecot.
1601         cat <<'EOF'
1602 ssl_cert = </etc/exim4/exim.crt
1603 ssl_key = </etc/exim4/exim.key
1604 EOF
1605       fi
1606
1607       cat <<'EOF'
1608 # https://ssl-config.mozilla.org
1609 ssl = required
1610 # this is the same as the certbot list, in my cert cronjob, I check if that has changed upstream.
1611 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
1612 ssl_protocols = TLSv1.2
1613 ssl_prefer_server_ciphers = no
1614
1615 protocol lmtp {
1616 #per https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
1617 # default is just $mail_plugins
1618   mail_plugins = $mail_plugins sieve
1619 }
1620 EOF
1621       if dpkg --compare-versions $(dpkg-query -f='${Version}\n' --show dovecot-core) ge 1:2.3; then
1622         cat <<EOF
1623 ssl_dh = </etc/dovecot/dhparam
1624 EOF
1625       fi
1626     } >/etc/dovecot/local.conf
1627
1628     ;;&
1629
1630   # **  $MAIL_HOST)
1631   $MAIL_HOST)
1632     # If we changed 90-sieve.conf and removed the active part of the
1633     # sieve option, we wouldn\'t need this, but I\'d rather not modify a
1634     # default config if not needed. This won\'t work as a symlink in /a/c
1635     # unfortunately.
1636     m sudo -u $u /a/exe/lnf -T sieve/main.sieve $uhome/.dovecot.sieve
1637
1638     if [[ ! -e $uhome/sieve/personal.sieve ]]; then
1639       m touch $uhome/sieve/personal{,end}{,test}.sieve
1640     fi
1641
1642     rm -fv /etc/dovecot/conf.d/20-lmtp.conf # file from prev version
1643     cat >>/etc/dovecot/local.conf <<EOF
1644 # simple password file based login
1645 !include conf.d/auth-passwdfile.conf.ext
1646
1647 # ian: %u is used for alerts user vs iank
1648 mail_location = maildir:/m/%u:LAYOUT=fs:INBOX=/m/%u/INBOX
1649 mail_uid = $u
1650 mail_gid = $u
1651
1652 protocol lmtp {
1653 # For a normal setup with exim, we need something like this, which
1654 # removes the domain part
1655 #  auth_username_format = %Ln
1656 #
1657 #  or else # Exim says something like
1658 #  "LMTP error after RCPT ... 550 ... User doesn't exist someuser@somedomain"
1659 # Dovecot verbose log says something like
1660 # "auth-worker(9048): passwd(someuser@somedomain): unknown user"
1661 # reference: http://wiki.dovecot.org/LMTP/Exim
1662 #
1663 # However, I use this to direct all mail to the same inbox.
1664 # A normal way to do this, which I did at first is to have
1665 # a router in exim almost at the end, eg 950,
1666 #local_catchall:
1667 #  debug_print = "R: catchall for \$local_part@\$domain"
1668 #  driver = redirect
1669 #  domains = +local_domains
1670 #  data = $u
1671 # based on
1672 # http://blog.alteholz.eu/2015/04/exim4-and-catchall-email-address/
1673 # with superflous options removed.
1674 # However, this causes the envelope to be rewritten,
1675 # which makes filtering into mailboxes a little less robust or more complicated,
1676 # so I've done it this way instead. it also requires
1677 # modifying the local router in exim.
1678   auth_username_format = $u
1679 }
1680 EOF
1681     ;;&
1682   # **  bk|je)
1683   bk|je)
1684     chown -R mail.mail /m/md
1685
1686     f=/etc/dovecot/conf.d/10-auth.conf
1687     if [[ -e $f ]]; then
1688       mv $f $f-iank-disabled
1689     fi
1690
1691     cat >>/etc/dovecot/local.conf <<EOF
1692 !include /etc/dovecot/local.conf.ext
1693
1694 # for debugging info, uncomment these.
1695 # logs go to syslog and to /var/log/mail.log
1696 #auth_verbose=yes
1697 #mail_debug=yes
1698
1699
1700 protocol lmtp {
1701 # This downcases the localpart. default is case sensitive.
1702 # case sensitive local part will miss out on valid email when some person or system
1703 # mistakenly capitalizes things.
1704   auth_username_format = %Lu
1705 }
1706
1707 # make 147 only listen on localhost, plan to use for nextcloud.
1708 # copied from mailinabox
1709 service imap-login {
1710   inet_listener imap {
1711     address = 127.0.0.1
1712   }
1713 }
1714 # https://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_dovecot_authenticator.html
1715 service auth {
1716   unix_listener auth-client {
1717     user = Debian-exim
1718     group = Debian-exim
1719   }
1720 }
1721
1722
1723 plugin {
1724   sieve_before = /etc/dovecot/sieve-spam.sieve
1725   # from mailinabox
1726   sieve = /m/sieve/%d/%n.sieve
1727   sieve_dir = /m/sieve/%d/%n
1728 }
1729
1730
1731 # all taken from mailinabox.
1732 mail_location = maildir:/m/md/%d/%n
1733 # meh, ok.
1734 mail_privileged_group = mail
1735 # By default Dovecot allows users to log in only with UID numbers 500 and above. mail is 8
1736 first_valid_uid = 1
1737
1738 # todo: test these changes in the universal config
1739 # mailboxes taken from mailinabox but removed
1740 # settings duplicate to defaults
1741 namespace inbox {
1742   mailbox INBOX {
1743     auto = subscribe
1744   }
1745   mailbox Spam {
1746     special_use = \Junk
1747     auto = subscribe
1748   }
1749   mailbox Drafts {
1750     auto = subscribe
1751   }
1752   mailbox Sent {
1753     auto = subscribe
1754   }
1755   mailbox Trash {
1756     auto = subscribe
1757   }
1758   mailbox Archive {
1759     special_use = \Archive
1760     auto = subscribe
1761   }
1762 }
1763 auth_mechanisms = plain login
1764 EOF
1765
1766     i /etc/dovecot/sieve-spam.sieve <<'EOF'
1767 require ["regex", "fileinto", "imap4flags"];
1768
1769 if allof (header :regex "X-Spam-Status" "^Yes") {
1770   fileinto "Spam";
1771   stop;
1772 }
1773 EOF
1774
1775     i /etc/dovecot/local.conf.ext <<'EOF'
1776 passdb {
1777   driver = sql
1778   args = /etc/dovecot/dovecot-sql.conf.ext
1779 }
1780 userdb {
1781   driver = sql
1782   args = /etc/dovecot/dovecot-sql.conf.ext
1783 }
1784
1785 EOF
1786
1787     i /etc/dovecot/dovecot-sql.conf.ext <<'EOF'
1788 # from mailinabox
1789 driver = sqlite
1790 # for je and bk, populated the testignore users for the relevant domains
1791 connect = /m/rc/users.sqlite
1792 default_pass_scheme = SHA512-CRYPT
1793 password_query = SELECT email as user, password FROM users WHERE email='%u';
1794 user_query = SELECT email AS user, "mail" as uid, "mail" as gid, "/m/md/%d/%n" as home FROM users WHERE email='%u';
1795 iterate_query = SELECT email AS user FROM users;
1796 EOF
1797     m chmod 0600 /etc/dovecot/dovecot-sql.conf.ext # per Dovecot instructions
1798
1799     # db needs to be in a www-data writable directory
1800     db=/m/rc/users.sqlite
1801     if [[ ! -s $db ]]; then
1802       m mkdir -p /m/rc
1803       m sqlite3 $db <<'EOF'
1804 CREATE TABLE users (
1805 id INTEGER PRIMARY KEY AUTOINCREMENT,
1806 email TEXT NOT NULL UNIQUE,
1807 password TEXT NOT NULL,
1808 extra,
1809 privileges TEXT NOT NULL DEFAULT '');
1810 EOF
1811     fi
1812     # users.sqlite is saved into /p/c/machine_specific, so update it there!.
1813     #
1814     # example of adding a user:
1815     # hash: doveadm pw -s SHA512-CRYPT -p passhere
1816     # sqlite3 /m/rc/users.sqlite <<'EOF'
1817     #insert into users (email, password) values ('testignore@bk.b8.nz', 'hash');
1818     #EOF
1819     # update users set password = 'hash' where email = 'testignore@bk.b8.nz';
1820
1821     # this should be at the end since it requires a valid dovecot config
1822     m sievec /etc/dovecot/sieve-spam.sieve
1823     ;;&
1824   # **  bk)
1825   bk)
1826     # roundcube uses this
1827     mkdir -p /m/sieve
1828     chown mail.mail /m/sieve
1829     m pi dovecot-managesieved
1830     ;;
1831 esac
1832
1833 # * thunderbird autoconfig setup
1834
1835 bkdomains=(expertpathologyreview.com amnimal.ninja)
1836 if [[ $HOSTNAME == bk ]]; then
1837   for domain in ${bkdomains[@]}; do
1838     m /a/exe/web-conf apache2 autoconfig.$domain
1839     dir=/var/www/autoconfig.$domain/html/mail
1840     m mkdir -p $dir
1841     # taken from mailinabox
1842     i $dir/config-v1.1.xml <<EOF
1843 <?xml version="1.0" encoding="UTF-8"?>
1844 <clientConfig version="1.1">
1845     <emailProvider id="$domain">
1846       <domain>$domain</domain>
1847
1848       <displayName>$domain Mail</displayName>
1849       <displayShortName>$domain</displayShortName>
1850
1851       <incomingServer type="imap">
1852          <hostname>mail2.iankelling.org</hostname>
1853          <port>993</port>
1854          <socketType>SSL</socketType>
1855          <username>%EMAILADDRESS%</username>
1856          <authentication>password-cleartext</authentication>
1857       </incomingServer>
1858
1859       <outgoingServer type="smtp">
1860          <hostname>mail2.iankelling.org</hostname>
1861          <port>587</port>
1862          <socketType>STARTTLS</socketType>
1863          <username>%EMAILADDRESS%</username>
1864          <authentication>password-cleartext</authentication>
1865          <addThisServer>true</addThisServer>
1866          <useGlobalPreferredServer>false</useGlobalPreferredServer>
1867       </outgoingServer>
1868
1869       <documentation url="https://$domain/">
1870          <descr lang="en">$domain website.</descr>
1871       </documentation>
1872     </emailProvider>
1873
1874     <webMail>
1875       <loginPage url="https://$domain/roundcube" />
1876       <loginPageInfo url="https://$domain/roundcube" >
1877         <username>%EMAILADDRESS%</username>
1878         <usernameField id="rcmloginuser" name="_user" />
1879         <passwordField id="rcmloginpwd" name="_pass" />
1880         <loginButton id="rcmloginsubmit" />
1881       </loginPageInfo>
1882     </webMail>
1883     <clientConfigUpdate url="https://autoconfig.$domain/mail/config-v1.1.xml" />
1884 </clientConfig>
1885 EOF
1886   done
1887 fi
1888
1889 # * roundcube setup
1890
1891 if [[ $HOSTNAME == bk ]]; then
1892
1893   # zip according to /installer
1894   # which requires adding a line to /usr/local/lib/roundcubemail/config/config.inc.php
1895   # $config['enable_installer'] = true;
1896   pi roundcube roundcube-sqlite3 php-zip apache2 php-fpm
1897
1898   ### begin composer install
1899   # https://getcomposer.org/doc/faqs/how-to-install-composer-programmatically.md
1900   # cd $(mktemp -d)
1901   # sum="$(wget -q -O - https://composer.github.io/installer.sig)"
1902   # m php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
1903   # if [[ $sum != $(php -r "echo hash_file('sha384', 'composer-setup.php');") ]]; then
1904   #   echo 'ERROR: Invalid composer installer checksum' >&2
1905   #   rm -fv composer-setup.php
1906   #   exit 1
1907   # fi
1908   # m php composer-setup.php --quiet
1909   # rm -fv composer-setup.php
1910   # m mv composer.phar /usr/local/bin
1911
1912   # the above method gets composer2, carddav plugin at least doesnt work with that
1913   # yet, it was just released 10-24-2020.
1914   m cd /usr/local/bin
1915   m wget -nv -N https://getcomposer.org/composer-1.phar
1916   chmod +x composer-1.phar
1917   ### end composer install
1918
1919   rcdirs=(/usr/local/lib/rcexpertpath /usr/local/lib/rcninja)
1920   ncdirs=(/var/www/ncninja)
1921   ncdirs=(/var/www/ncexpertpath /var/www/ncninja)
1922   # point debian cronjob to our local install, preventing daily cron error
1923
1924   # debian's cronjob will fail, remove both paths it uses just to be sure
1925   rm -fv /usr/share/roundcube/bin/cleandb.sh /etc/cron.d/roundcube-core
1926
1927   #### begin dl roundcube
1928   # note, im r2e subbed to https://github.com/roundcube/roundcubemail/releases.atom
1929   v=1.4.13; f=roundcubemail-$v-complete.tar.gz
1930   cd /root
1931   if [[ -e $f ]]; then
1932     timestamp=$(stat -c %Y $f)
1933   else
1934     timestamp=0
1935   fi
1936   m wget -nv -N https://github.com/roundcube/roundcubemail/releases/download/$v/$f
1937   new_timestamp=$(stat -c %Y $f)
1938   for rcdir in ${rcdirs[@]}; do
1939     if [[ $timestamp != "$new_timestamp" ||  ! -e "$rcdir/config/secret" ]]; then
1940       m tar -C /usr/local/lib --no-same-owner -zxf $f
1941       m rm -rf $rcdir
1942       m mv /usr/local/lib/roundcubemail-$v $rcdir
1943     fi
1944   done
1945   #### end dl roundcube
1946
1947   for ((i=0; i < ${#bkdomains[@]}; i++)); do
1948     domain=${bkdomains[i]}
1949     rcdir=${rcdirs[i]}
1950     rcbase=${rcdir##*/}
1951     ncdir=${ncdirs[i]}
1952
1953     # copied from debians cronjob
1954     i /etc/cron.d/$rcbase <<EOF
1955 #  Roundcube database cleaning: finally removes all records that are
1956 #  marked as deleted.
1957 0   5  *   *   *   www-data $rcdir/bin/cleandb.sh >/dev/null
1958 EOF
1959
1960     m /a/exe/web-conf - apache2 $domain <<EOF
1961 Alias /roundcube $rcdir
1962 ### begin roundcube settings
1963 # taken from /etc/apache2/conf-available/roundcube.conf version 1.4.8+dfsg.1-1~bpo10+1
1964 <Directory $rcdir/>
1965   Options +FollowSymLinks
1966   # This is needed to parse $rcdir/.htaccess.
1967   AllowOverride All
1968   Require all granted
1969 </Directory>
1970 # Protecting basic directories:
1971 <Directory $rcdir/config>
1972   Options -FollowSymLinks
1973   AllowOverride None
1974 </Directory>
1975 ### end roundcube settings
1976
1977
1978 ### begin nextcloud settings
1979 Alias /nextcloud "$ncdir/"
1980 <Directory $ncdir/>
1981   Require all granted
1982   AllowOverride All
1983   Options FollowSymLinks MultiViews
1984
1985   <IfModule mod_dav.c>
1986     Dav off
1987   </IfModule>
1988
1989 </Directory>
1990
1991 # based on install checker, links to
1992 # https://docs.nextcloud.com/server/19/admin_manual/issues/general_troubleshooting.html#service-discovery
1993 # their example was a bit wrong, I figured it out by adding
1994 # LogLevel warn rewrite:trace5
1995 # then watching the apache logs
1996
1997 RewriteEngine on
1998 RewriteRule ^/\.well-known/host-meta /nextcloud/public.php?service=host-meta [QSA,L]
1999 RewriteRule ^/\.well-known/host-meta\.json /nextcloud/public.php?service=host-meta-json [QSA,L]
2000 RewriteRule ^/\.well-known/webfinger /nextcloud/public.php?service=webfinger [QSA,L]
2001 RewriteRule ^/\.well-known/carddav /nextcloud/remote.php/dav/ [R=301,L]
2002 RewriteRule ^/\.well-known/caldav /nextcloud/remote.php/dav/ [R=301,L]
2003 ### end nextcloud settings
2004 EOF
2005     if [[ ! -e $rcdir/config/secret ]]; then
2006       base64 </dev/urandom | head -c24 >$rcdir/config/secret || [[ $? == 141 || ${PIPESTATUS[0]} == 32 ]]
2007     fi
2008     secret=$(cat $rcdir/config/secret)
2009
2010     rclogdir=/var/log/$rcbase
2011     rctmpdir=/var/tmp/$rcbase
2012     rcdb=/m/rc/$rcbase.sqlite
2013     # config from mailinabox
2014     i $rcdir/config/config.inc.php <<EOF
2015 <?php
2016 \$config = array();
2017 # debian creates this for us
2018 \$config['log_dir'] = '$rclogdir/';
2019 # debian also creates a temp dir, but it is under its install dir,
2020 # seems better to have our own.
2021 \$config['temp_dir'] = '$rctmpdir/';
2022 \$config['db_dsnw'] = 'sqlite:///$rcdb?mode=0640';
2023 \$config['default_host'] = 'ssl://localhost';
2024 \$config['default_port'] = 993;
2025 \$config['imap_conn_options'] = array(
2026   'ssl'         => array(
2027      'verify_peer'  => false,
2028      'verify_peer_name'  => false,
2029    ),
2030  );
2031 \$config['imap_timeout'] = 15;
2032 \$config['smtp_server'] = 'tls://127.0.0.1';
2033 \$config['smtp_conn_options'] = array(
2034   'ssl'         => array(
2035      'verify_peer'  => false,
2036      'verify_peer_name'  => false,
2037    ),
2038  );
2039 \$config['product_name'] = 'webmail';
2040 \$config['des_key'] = '$secret';
2041 \$config['plugins'] = array('archive', 'zipdownload', 'password', 'managesieve', 'jqueryui', 'carddav', 'html5_notifier');
2042 \$config['skin'] = 'elastic';
2043 \$config['login_autocomplete'] = 2;
2044 \$config['password_charset'] = 'UTF-8';
2045 \$config['junk_mbox'] = 'Spam';
2046 # disable builtin addressbook
2047 \$config['address_book_type'] = '';
2048 ?>
2049 EOF
2050
2051     m mkdir -p $rclogdir
2052     m chmod 750 $rclogdir
2053     m chown www-data:adm $rclogdir
2054     # note: subscribed to updates:
2055     # r2e add rcmcarddav https://github.com/blind-coder/rcmcarddav/commits/master.atom ian@iankelling.org
2056     # r2e add roundcube https://github.com/roundcube/roundcubemail/releases.atom ian@iankelling.org
2057     m mkdir -p $rctmpdir /m/rc
2058     m chown -R www-data.www-data $rctmpdir /m/rc
2059     m chmod 750 $rctmpdir
2060     # Ensure the log file monitored by fail2ban exists, or else fail2ban can't start.
2061     # todo: check for other mailinabox things
2062     m sudo -u www-data touch $rclogdir/errors.log
2063
2064     #### begin carddav install
2065     # This is the official roundcube carddav repo.
2066     # Install doc suggests downloading with composer, but that
2067     # didnt work, it said some ldap package for roundcube was missing,
2068     # but I dont want to download some extra ldap thing.
2069     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/INSTALL.md
2070     verf=$rcdir/plugins/carddav/myversion
2071     upgrade=false
2072     install=false
2073     v=4.0.0
2074     if [[ -e $verf ]]; then
2075       if [[ $(cat $verf) != "$v" ]]; then
2076         install=true
2077         upgrade=true
2078       fi
2079     else
2080       install=true
2081     fi
2082     if $install; then
2083       m rm -rf $rcdir/plugins/carddav
2084       tmpd=$(mktemp -d)
2085       m wget -nv -O $tmpd/t.tgz https://github.com/blind-coder/rcmcarddav/releases/download/v$v/carddav-v$v.tgz
2086       cd $rcdir/plugins
2087       tar xzf $tmpd/t.tgz
2088       rm -rf $tmpd
2089       m chown -R www-data:www-data $rcdir/plugins/carddav
2090       m cd $rcdir/plugins/carddav
2091       if $upgrade; then
2092         m sudo -u www-data composer-1.phar update --no-dev
2093       else
2094         m sudo -u www-data composer-1.phar install --no-dev
2095       fi
2096       m chown -R root:root $rcdir/plugins/carddav
2097       echo $v >$verf
2098     fi
2099
2100     # So, strangely, this worked in initial testing, but then
2101     # on first run it wouldn't show the existing contacts until
2102     # I went into the carddav settings and did "force immediate sync",
2103     # which seemed to fix things. Note, some of these settings
2104     # get initalized per/addressbook in the db, then need changing
2105     # there or through the settings menu.
2106
2107     # About categories, see https://www.davx5.com/tested-with/nextcloud
2108     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/GROUPS.md
2109     i $rcdir/plugins/carddav/config.inc.php <<EOF;
2110 <?php
2111 \$prefs['_GLOBAL']['hide_preferences'] = false;
2112 \$prefs['davserver'] = array(
2113 # name in the UI is kind of dumb. This is just something short that seems to fit ok.
2114   'name'         =>  'Main',
2115   'username'     =>  '%u', // login username
2116   'password'     =>  '%p', // login password
2117   'url'          =>  'https://$domain/nextcloud/remote.php/dav/addressbooks/users/%u/contacts',
2118   'active'       =>  true,
2119   'readonly'     =>  false,
2120   'refresh_time' => '00:10:00',
2121   'fixed'        =>  array('username','password'),
2122   'use_categories' => false,
2123   'hide'        =>  false,
2124 );
2125 ?>
2126 EOF
2127     #### end carddav install
2128
2129     cd $rcdir/plugins
2130     if [[ ! -d html5_notifier ]]; then
2131       m git clone https://github.com/stremlau/html5_notifier
2132     fi
2133     cd $rcdir/plugins/html5_notifier
2134     m git pull --rebase
2135
2136     # todo: try out roundcube plugins: thunderbird labels
2137
2138     # Password changing plugin settings
2139     cat $rcdir/plugins/password/config.inc.php.dist - >$rcdir/plugins/password/config.inc.php <<'EOF'
2140 # following are from mailinabox
2141 $config['password_minimum_length'] = 8;
2142 $config['password_db_dsn'] = 'sqlite:////m/rc/users.sqlite';
2143 $config['password_query'] = 'UPDATE users SET password=%D WHERE email=%u';
2144 $config['password_dovecotpw'] = '/usr/bin/doveadm pw';
2145 $config['password_dovecotpw_method'] = 'SHA512-CRYPT';
2146 $config['password_dovecotpw_with_method'] = true;
2147 EOF
2148     # so PHP can use doveadm, for the password changing plugin
2149     m usermod -a -G dovecot www-data
2150     m usermod -a -G mail $u
2151
2152     # so php can update passwords
2153     m chown www-data:dovecot /m/rc/users.sqlite
2154     m chmod 664 /m/rc/users.sqlite
2155
2156     # Run Roundcube database migration script (database is created if it does not exist)
2157     m $rcdir/bin/updatedb.sh --dir $rcdir/SQL --package roundcube
2158     m chown www-data:www-data $rcdb
2159     m chmod 664 $rcdb
2160   done # end loop over domains and rcdirs
2161
2162   ### begin php setup for rc ###
2163   # Enable PHP modules.
2164   m phpenmod -v php mcrypt imap
2165   # dpkg says this is required
2166   m a2enmod proxy_fcgi setenvif
2167   fpm=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* (php[^ ]*-fpm)( .*|$)/\1/p') # eg: php7.4-fpm
2168   phpver=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* php([^ ]*)-fpm( .*|$)/\1/p')
2169   m a2enconf $fpm
2170   # 3 useless guides on php fpm fcgi debian 10 later, i figure out from reading
2171   # /etc/apache2/conf-enabled/php7.3-fpm.conf
2172   m a2dismod php$phpver
2173   # according to /install, we should set date.timezone,
2174   # but that is dumb, the system already has the right zone in
2175   # $rclogdir/errors.log
2176   # todo: consider other settings in
2177   # /a/opt/mailinabox/setup/nextcloud.sh
2178   i /etc/php/$phpver/cli/conf.d/30-local.ini <<'EOF'
2179 apc.enable_cli = 1
2180 EOF
2181
2182   i /etc/php/$phpver/fpm/conf.d/30-local.ini <<'EOF'
2183 date.timezone = "America/New_York"
2184 # for nextcloud
2185 upload_max_filesize = 2000M
2186 post_max_size = 2000M
2187 # install checker, nextcloud/settings/admin/overview
2188 memory_limit = 512M
2189 EOF
2190   m systemctl restart $fpm
2191   # dunno if reload/restart is needed
2192   m systemctl reload apache2
2193   # note bk backups are defined in crontab outside this file
2194   ### end php setup for rc ###
2195
2196 fi # end roundcube setup
2197
2198 # * nextcloud setup
2199
2200 if [[ $HOSTNAME == bk ]]; then
2201   # from install checker, nextcloud/settings/admin/overview and
2202   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2203   # curl from the web installer requirement, but i switched to cli
2204   # it recommends php-file info, but that is part of php7.3-common, already got installed
2205   # with roundcube.
2206   m pi php-curl php-bz2 php-gmp php-bcmath php-imagick php-apcu
2207
2208   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2209   cat >/etc/php/$phpver/fpm/pool.d/localwww.conf <<'EOF'
2210 [www]
2211 clear_env = no
2212 EOF
2213
2214   for ((i=0; i < ${#bkdomains[@]}; i++)); do
2215     domain=${bkdomains[i]}
2216     ncdir=${ncdirs[i]}
2217     ncbase=${ncdir##*/}
2218     m cd /var/www
2219     if [[ ! -e $ncdir/index.php ]]; then
2220       # if we wanted to only install a specific version, use something like
2221       # file=latest-22.zip
2222       file=latest.zip
2223       m wget -nv -N https://download.nextcloud.com/server/releases/$file
2224       m rm -rf nextcloud
2225       m unzip -q $file
2226       m rm -f $file
2227       m chown -R www-data.www-data nextcloud
2228       m mv nextcloud $ncdir
2229       m cd $ncdir
2230       m sudo -u www-data php occ  maintenance:install --database sqlite --admin-user iank --admin-pass $nextcloud_admin_pass
2231     fi
2232     # note, strange this happend where updater did not increment the version var,
2233     # mine was stuck on 20. I manually updated it.
2234     m cd $ncdir/config
2235     if [[ ! -e config.php-orig ]]; then
2236       m cp -a config.php config.php-orig
2237     fi
2238     cat config.php-orig - >tmp.php <<EOF
2239 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/email_configuration.html
2240 \$CONFIG["mail_smtpmode"] = "sendmail";
2241 \$CONFIG["mail_smtphost"] = "127.0.0.1";
2242 \$CONFIG["mail_smtpport"] = 25;
2243 \$CONFIG["mail_smtptimeout"] = 10;
2244 \$CONFIG["mail_smtpsecure"] = "";
2245 \$CONFIG["mail_smtpauth"] = false;
2246 \$CONFIG["mail_smtpauthtype"] = "LOGIN";
2247 \$CONFIG["mail_smtpname"] = "";
2248 \$CONFIG["mail_smtppassword"] = "";
2249 \$CONFIG["mail_domain"] = "$domain";
2250
2251 # https://github.com/nextcloud/user_external#readme
2252 # plus mailinabox example
2253 #\$CONFIG['user_backends'] = array(array('class' => 'OC_User_IMAP','arguments' => array('127.0.0.1', 143, null),),);
2254
2255
2256 # based on installer check
2257 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/caching_configuration.html
2258 \$CONFIG['memcache.local'] = '\OC\Memcache\APCu';
2259
2260 \$CONFIG['overwrite.cli.url'] = 'https://$domain/nextcloud';
2261 \$CONFIG['htaccess.RewriteBase'] = '/nextcloud';
2262 \$CONFIG['trusted_domains'] = array (
2263         0 => '$domain',
2264     );
2265 #\$CONFIG[''] = '';
2266 fwrite(STDOUT, "<?php\n\\\$CONFIG = ");
2267 var_export(\$CONFIG);
2268 fwrite(STDOUT, ";\n");
2269 EOF
2270     m php tmp.php >config.php
2271     m rm -f tmp.php
2272     m sudo -u www-data php $ncdir/occ maintenance:update:htaccess
2273     list=$(sudo -u www-data php $ncdir/occ --output=json_pretty app:list)
2274     # user_external not compaible with nc 23
2275     for app in contacts calendar; do
2276       if [[ $(printf "%s\n" "$list"| jq ".enabled.$app") == null ]]; then
2277         m sudo -u www-data php $ncdir/occ app:install $app
2278       fi
2279     done
2280     i /etc/systemd/system/$ncbase.service <<EOF
2281 [Unit]
2282 Description=ncup $ncbase
2283 After=multi-user.target
2284
2285 [Service]
2286 Type=oneshot
2287 ExecStart=/usr/local/bin/ncup $ncbase
2288 User=www-data
2289 IOSchedulingClass=idle
2290 CPUSchedulingPolicy=idle
2291 EOF
2292     i /etc/systemd/system/$ncbase.timer <<EOF
2293 [Unit]
2294 Description=ncup $ncbase timer
2295
2296 [Timer]
2297 OnCalendar=Daily
2298
2299 [Install]
2300 WantedBy=timers.target
2301 EOF
2302     systemctl enable --now $ncbase.timer
2303     i /usr/local/bin/ncup <<'EOFOUTER'
2304 #!/bin/bash
2305 if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
2306 shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
2307 set -eE -o pipefail
2308 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR
2309
2310 ncbase=$1
2311 if ! php /var/www/$ncbase/updater/updater.phar -n; then
2312   echo failed nextcloud update for $ncbase >&2
2313   /sbin/exim -t <<EOF
2314 To: alerts@iankelling.org
2315 From: root@$(hostname -f)
2316 Subject: failed nextcloud update for $ncbase
2317
2318 For logs, run: jr -u $ncbase
2319 EOF
2320 fi
2321 EOFOUTER
2322     chmod +x /usr/local/bin/ncup
2323
2324     mkdir -p /var/www/cron-errors
2325     chown www-data.www-data /var/www/cron-errors
2326     i /etc/cron.d/$ncbase <<EOF
2327 PATH=/usr/sbin:/sbin:/usr/bin:/bin:/usr/local/bin
2328 SHELL=/bin/bash
2329 # https://docs.nextcloud.com/server/20/admin_manual/configuration_server/background_jobs_configuration.html
2330 */5  *  *  *  * www-data php -f $ncdir/cron.php --define apc.enable_cli=1 |& log-once nccron
2331 EOF
2332
2333   done
2334 fi
2335
2336
2337 # * exim host conditional config
2338
2339 # ** exim certs
2340
2341 all_dirs=(/p/c/filesystem)
2342 for x in /p/c/machine_specific/*.hosts /a/bin/ds/machine_specific/*.hosts; do
2343   if grep -qxF $HOSTNAME $x; then all_dirs+=( ${x%.hosts} ); fi
2344 done
2345 files=()
2346 for d in ${all_dirs[@]}; do
2347   f=$d/etc/exim4/passwd
2348   if [[ -e $f  ]]; then
2349     files+=($f)
2350   fi
2351   tmp=($d/etc/exim4/*.pem)
2352   if (( ${#tmp[@]} )); then
2353     files+=(${tmp[@]})
2354   fi
2355 done
2356
2357 if (( ${#files[@]} )); then
2358   sudo rsync -ahhi --chown=root:Debian-exim --chmod=0640 ${files[@]} /etc/exim4/
2359 fi
2360
2361
2362 # ** exim: auth
2363
2364 case $HOSTNAME in
2365   bk|je)
2366     # avoid accepting mail for invalid users
2367     # https://wiki.dovecot.org/LMTP/Exim
2368     cat >>/etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2369 deny
2370   message = invalid recipient
2371   domains = +local_domains
2372   !verify = recipient/callout=no_cache
2373 EOF
2374     i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2375 dovecot_plain:
2376   driver = dovecot
2377   public_name = PLAIN
2378   server_socket = /var/run/dovecot/auth-client
2379   server_set_id = $auth1
2380 EOF
2381     ;;
2382 esac
2383 if $bhost_t; then
2384   i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2385 # from 30_exim4-config_examples
2386 plain_server:
2387 driver = plaintext
2388 public_name = PLAIN
2389 server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
2390 server_set_id = $auth2
2391 server_prompts = :
2392 .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
2393 server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
2394 .endif
2395 EOF
2396 fi
2397
2398 # ** exim: main daemon use non-default config file
2399 case $HOSTNAME in
2400   bk|$MAIL_HOST)
2401     # to see the default comments in /etc/default/exim4:
2402     # s update-exim4defaults --force --init
2403     # which will overwrite any existing file
2404     i /etc/default/exim4 <<'EOF'
2405 QUEUERUNNER='combined'
2406 QUEUEINTERVAL='30m'
2407 COMMONOPTIONS='-C /etc/exim4/my.conf'
2408 UPEX4OPTS='-o /etc/exim4/my.conf'
2409 # i use epanic-clean for alerting if there are bad paniclog entries
2410 E4BCD_WATCH_PANICLOG='no'
2411 EOF
2412     chown Debian-exim:Debian-exim /usr/sbin/exim4
2413     # needs guid set in order to become Debian-exim
2414     chmod g+s,u+s /usr/sbin/exim4
2415     i /etc/exim4/trusted_configs <<'EOF'
2416 /etc/exim4/my.conf
2417 EOF
2418     ;;
2419   *)
2420     # default file
2421     i /etc/default/exim4 <<'EOF'
2422 QUEUERUNNER='combined'
2423 QUEUEINTERVAL='30m'
2424 EOF
2425     ;;
2426 esac
2427
2428 # ** exim non-root
2429
2430 case $HOSTNAME in
2431   bk|je|li)
2432     # no reason to expect it to ever be there.
2433     rm -fv /etc/systemd/system/exim4.service.d/nonroot.conf
2434     ;;
2435   *)
2436     dirs=()
2437     for d in /a /d /m /media /mnt /nocow /o /p /q; do
2438       if [[ -d $d ]]; then
2439         dirs+=($d)
2440       fi
2441     done
2442     i /etc/systemd/system/exim4.service.d/nonroot.conf <<EOF
2443 [Service]
2444 # see 56.2 Root privilege in exim spec
2445 AmbientCapabilities=CAP_NET_BIND_SERVICE
2446 # https://www.redhat.com/sysadmin/mastering-systemd
2447 # things that seem good and reasonabl.e
2448 PrivateTmp=yes
2449 ProtectHome=yes
2450 # note, in t10 systemd, if one of these is an sshfs mountpoint,
2451 # this whole setting doesnt work. tried it with a newer systemd 250 though
2452 # an nspawn, and it worked there.
2453 InaccessiblePaths=${dirs[@]}
2454 NoNewPrivileges=yes
2455 ProtectSystem=yes
2456
2457 # when we get newer systemd
2458 #ProtectDevices=yes
2459 EOF
2460     i /etc/exim4/conf.d/main/000_local-noroot <<'EOF'
2461 # see 56.2 Root privilege in exim spec
2462 deliver_drop_privilege = true
2463 EOF
2464     files=(
2465       300_exim4-config_real_local
2466       600_exim4-config_userforward
2467       700_exim4-config_procmail
2468       800_exim4-config_maildrop
2469       mmm_mail4root
2470     )
2471     for f in ${files[@]}; do
2472       echo "# iank: removed due to running nonroot"|i /etc/exim4/conf.d/router/$f
2473     done
2474     ;;
2475 esac
2476
2477 case $HOSTNAME in
2478
2479   # ** $MAIL_HOST|bk|je)
2480   $MAIL_HOST|bk|je)
2481
2482     echo|i /etc/exim4/conf.d/router/870_backup_local
2483
2484     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2485 # note: some things we don't set that are here by default because they are unused.
2486 dc_local_interfaces=''
2487 dc_eximconfig_configtype='internet'
2488 dc_localdelivery='dovecot_lmtp'
2489 EOF
2490     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2491 # recommended if dns is expected to work
2492 CHECK_RCPT_VERIFY_SENDER = true
2493 # default config comment says: If you enable this, you might reject legitimate mail,
2494 # but eggs has had this a long time, so that seems unlikely.
2495 CHECK_RCPT_SPF = true
2496 CHECK_RCPT_REVERSE_DNS = true
2497 CHECK_MAIL_HELO_ISSUED = true
2498
2499 # enable 587 in addition to the default 25, so that
2500 # i can send mail where port 25 is firewalled by isp
2501 daemon_smtp_ports = 25 : 587
2502 # default of 25, can get stuck when catching up on mail
2503 smtp_accept_max = 400
2504 smtp_accept_reserve = 100
2505 smtp_reserve_hosts = +iank_trusted
2506
2507 # options exim has to avoid having to alter the default config files
2508 CHECK_RCPT_LOCAL_ACL_FILE = /etc/exim4/conf.d/rcpt_local_acl
2509 CHECK_DATA_LOCAL_ACL_FILE = /etc/exim4/conf.d/data_local_acl
2510 LOCAL_DENY_EXCEPTIONS_LOCAL_ACL_FILE = /etc/exim4/conf.d/local_deny_exceptions_acl
2511 # testing dmarc
2512 #dmarc_tld_file = /etc/public_suffix_list.dat
2513 EOF
2514     ;;&
2515
2516   # ** $MAIL_HOST|bk)
2517   $MAIL_HOST|bk)
2518
2519     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2520 # je.b8.nz will run out of memory with freshclam
2521 av_scanner = clamd:/var/run/clamav/clamd.ctl
2522 EOF
2523
2524     cat >> /etc/exim4/conf.d/data_local_acl <<'EOF'
2525 deny
2526   malware = */defer_ok
2527   !condition = ${if match {$malware_name}{\N^Heuristic\N}}
2528   message = This message was detected as possible malware ($malware_name).
2529 EOF
2530
2531     cat >/etc/exim4/conf.d/main/000_local-nn <<EOF
2532 # MAIN_HARDCODE_PRIMARY_HOSTNAME might mess up the
2533 # smarthost config type, not sure.
2534 # failing message on mail-tester.com:
2535 # We check if there is a server (A Record) behind your hostname kd.
2536 # You may want to publish a DNS record (A type) for the hostname kd or use a different hostname in your mail software
2537 # https://serverfault.com/questions/46545/how-do-i-change-exim4s-primary-hostname-on-a-debian-box
2538 # and this one seemed appropriate from grepping config.
2539 # I originally set this to li.iankelling.org, but then ended up with errors when li tried to send
2540 # mail to kd, so this should basically be a name that no host has as their
2541 # canonical hostname since the actual host sits behind a nat and changes.
2542 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail.iankelling.org
2543 # I used this to avoid sender verification, didnt work but it still
2544 # makes sense based on the spec.
2545 hosts_treat_as_local = defaultnn.b8.nz
2546
2547 # Outside nn, we get the default cert location from a debian macro,
2548 # and the cert file is put in place by a certbot hook.
2549 MAIN_TLS_CERTIFICATE = /etc/exim4/fullchain.pem
2550 MAIN_TLS_PRIVATEKEY = /etc/exim4/privkey.pem
2551 EOF
2552
2553     i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost <<'EOF'
2554 gnusmarthost:
2555   debug_print = "R: smarthost for $local_part@$domain"
2556   driver = manualroute
2557   domains = ! +local_domains
2558 # send most mail through eggs, helps fsfs sender reputation.
2559 # uncomment and optionally move to 188 file to send through my own servers again
2560   senders = *@gnu.org
2561   transport = smarthost_dkim
2562   route_list = * fencepost.gnu.org::587 byname
2563   host_find_failed = ignore
2564   same_domain_copy_routing = yes
2565   no_more
2566 EOF
2567
2568     /a/exe/cedit defaultnn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2569 10.173.8.1 defaultnn.b8.nz
2570 EOF
2571     ;;&
2572   # ** $MAIL_HOST)
2573   $MAIL_HOST)
2574
2575     i /etc/exim4/conf.d/router/195_dnslookup_vpn <<'EOF'
2576 # copied from /etc/exim4/conf.d/router/200_exim4-config_primary, but
2577 # use vpn transport. lower priority so it overrides the default route.
2578 # Use this in case our vpn fails, we dont send anything without it.
2579 .ifdef DCconfig_internet
2580 dnslookup_vpn:
2581   debug_print = "R: dnslookup for $local_part@$domain"
2582   driver = dnslookup
2583   domains = ! +local_domains
2584   transport = remote_smtp_vpn
2585   same_domain_copy_routing = yes
2586   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
2587   no_more
2588 .endif
2589 EOF
2590
2591
2592     # note on backups: I used to do an automatic sshfs and restricted
2593     # permissions to a specific directory on the remote server, /bu/mnt,
2594     # which required using a dedicated user, but realized smtp will be
2595     # more reliable and less fuss. If I ever need that again, see the
2596     # history of this file, and bum in brc2.
2597
2598     i /etc/exim4/conf.d/router/890_backup_copy <<EOF
2599 ### router/900_exim4-config_local_user
2600 #################################
2601
2602 # todo, it would be nice to save sent email too,
2603 # but its not so important, they still exist in my head
2604
2605 backup_redir:
2606 driver = redirect
2607 domains = +local_domains
2608 # b is just an arbirary short string
2609 data = b@eximbackup.b8.nz
2610 # note, to test this, i could temporarily allow testignore.
2611 # alerts avoids potential mail loop. root is already
2612 # redirected earlier, so that is just being overly cautious.
2613 local_parts = ! root : ! testignore : ! alerts
2614 unseen = true
2615
2616 backup_copy:
2617 driver = manualroute
2618 domains = eximbackup.b8.nz
2619 transport = backup_remote
2620 ignore_target_hosts = ${HOSTNAME}wg.b8.nz
2621 # note changes here also require change in passwd.client
2622 route_list = * eximbackup.b8.nz
2623 same_domain_copy_routing = yes
2624 errors_to = alerts@iankelling.org
2625 no_more
2626 EOF
2627
2628
2629     i /etc/exim4/conf.d/transport/30_backup_remote <<'EOF'
2630 backup_remote:
2631   driver = smtp
2632   multi_domain
2633 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
2634   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
2635 .endif
2636   hosts_require_auth = *
2637   hosts_try_auth = *
2638   envelope_to_add
2639   # manual return path because we want it to be the envelope sender
2640   # we got not the one we are using in this smtp transport
2641   headers_add = "Return-path: $sender_address"
2642 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2643   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2644 .endif
2645 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2646   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2647 .endif
2648 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2649   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2650 .endif
2651 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
2652   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
2653 .endif
2654 .ifdef REMOTE_SMTP_HEADERS_REWRITE
2655   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
2656 .endif
2657 .ifdef REMOTE_SMTP_HELO_DATA
2658   helo_data=REMOTE_SMTP_HELO_DATA
2659 .endif
2660 .ifdef TLS_DH_MIN_BITS
2661 tls_dh_min_bits = TLS_DH_MIN_BITS
2662 .endif
2663 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2664 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2665 .endif
2666 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2667 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2668 .endif
2669 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2670   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2671 .endif
2672 EOF
2673
2674
2675     # this avoids some error. i cant remember what. todo:
2676     # test it out and document why/if its needed.
2677     #     i /etc/exim4/host_local_deny_exceptions <<'EOF'
2678     # mail.fsf.org
2679     # *.posteo.de
2680     # EOF
2681
2682     # cron email from smarthost hosts will automatically be to
2683     # USER@FQDN. I redirect that to alerts@, on the smarthosts, but in
2684     # case that doesn't work, we still want to accept that mail, but not
2685     # from any host except the smarthosts. local_hostnames and this rule
2686     # is for that purpose.
2687     i /etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2688 deny
2689   !authenticated = *
2690   domains = +local_hostnames
2691   message = no relay
2692 EOF
2693     echo|i /etc/exim4/conf.d/router/880_universal_forward
2694
2695
2696     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2697 MAILDIR_HOME_MAILDIR_LOCATION = /m/md/Sent
2698 EOF
2699
2700     # for iank@fsf.org, i have mail.fsf.org forward it to fsf@iankelling.org.
2701     # and also have mail.iankelling.org whitelisted as a relay domain.
2702     # I could avoid that if I changed this to submit to 587 with a
2703     # password like a standard mua.
2704     i /etc/exim4/conf.d/router/188_exim4-config_smarthost <<'EOF'
2705 # ian: save a copy of sent mail. i thought of other ways to
2706 # do this, for example, to only save sent mail that is not sent
2707 # from my mail client which saves a copy by default, but in the
2708 # end, it seems simplest to turn that off. We want to save
2709 # external mail sent by smarthosts.
2710 sentarchive:
2711   driver = redirect
2712   domains = ! +local_domains
2713   condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
2714   data    = vojdedIdNejyebni@b8.nz
2715   unseen
2716
2717 # ian: copied from /etc/exim4/conf.d/router/200_exim4-config_primary, and added senders = and
2718 # replaced DCsmarthost with hostname
2719 fsfsmarthost:
2720   debug_print = "R: smarthost for $local_part@$domain"
2721   driver = manualroute
2722   domains = ! +local_domains
2723   senders = *@fsf.org
2724   transport = remote_smtp_smarthost
2725   route_list = * mail.fsf.org::587 byname
2726   host_find_failed = ignore
2727   same_domain_copy_routing = yes
2728   no_more
2729
2730 posteosmarthost:
2731   debug_print = "R: smarthost for $local_part@$domain"
2732   driver = manualroute
2733   domains = ! +local_domains
2734   senders = *@posteo.net
2735   transport = remote_smtp_smarthost
2736   route_list = * posteo.de::587 byname
2737   host_find_failed = ignore
2738   same_domain_copy_routing = yes
2739   no_more
2740 EOF
2741
2742     # Greping /etc/exim4, unqualified mails this would end up as
2743     # a return path, so it should go somewhere we will see.
2744     # The debconf output about mailname is as follows:
2745     # The 'mail name' is the domain name used to 'qualify' mail addresses without a domain
2746     # name.
2747     # This name will also be used by other programs. It should be the single, fully
2748     # qualified domain name (FQDN).
2749     # Thus, if a mail address on the local host is foo@example.org, the correct value for
2750     # this option would be example.org.
2751     # This name won\'t appear on From: lines of outgoing messages if rewriting is enabled.
2752     echo iankelling.org > /etc/mailname
2753
2754
2755     # mail.iankelling.org so local imap clients can connect with tls and
2756     # when they happen to not be local.
2757     # todo: this should be 10.8.0.4
2758
2759     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2760 # note: i put nn.b8.nz into bind for good measure
2761 10.173.8.2 nn.b8.nz mx.iankelling.org
2762 EOF
2763
2764     # note: systemd-resolved will consult /etc/hosts, dnsmasq wont. this assumes
2765     # weve configured this file in dnsmasq if we are using it.
2766     /a/exe/cedit mail /etc/dnsmasq-servers.conf <<'EOF' || [[ $? == 1 ]]
2767 server=/mx.iankelling.org/127.0.1.1
2768 EOF
2769     # I used to use debconf-set-selections + dpkg-reconfigure,
2770     # which then updates this file
2771     # but the process is slower than updating it directly and then I want to set other things in
2772     # update-exim4.conf.conf, so there's no point.
2773     # The file is documented in man update-exim4.conf,
2774     # except the man page is not perfect, read the bash script to be sure about things.
2775
2776     # The debconf questions output is additional documentation that is not
2777     # easily accessible, but super long, along with the initial default comment in this
2778     # file, so I've saved that into ./mail-notes.conf.
2779     #
2780     # # TODO: remove mx.iankelling.org once systems get updated mail-setup from jan 2022
2781     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2782 # man page: is used to build the local_domains list, together with "localhost"
2783 # this is duplicated in a later router.
2784 dc_other_hostnames='iankelling.org;zroe.org;r2e.iankelling.org;mx.iankelling.org;!je.b8.nz;!bk.b8.nz;*.b8.nz;b8.nz'
2785 EOF
2786
2787
2788     # dmarc. not used currently
2789     f=/etc/cron.daily/refresh-dmarc-tld-file
2790     cat >$f <<'EOF'
2791 #!/bin/bash
2792 cd /etc
2793 wget -q -N https://publicsuffix.org/list/public_suffix_list.dat
2794 EOF
2795     m chmod 755 $f
2796
2797     ;;
2798   # ** bk
2799   ## we use this host to monitor MAIL_HOST and host a mail server for someone
2800   bk)
2801
2802     echo|i /etc/exim4/conf.d/rcpt_local_acl
2803     echo|i /etc/exim4/conf.d/router/880_universal_forward
2804
2805     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2806 10.173.8.2 nn.b8.nz
2807 EOF
2808
2809     sed -r -f - /etc/init.d/exim4  <<'EOF' | i /etc/init.d/exim4in
2810 s,/etc/default/exim4,/etc/default/exim4in,g
2811 s,/run/exim4/exim.pid,/run/exim4/eximin.pid,g
2812 s,(^[ #]*Provides:).*,\1 exim4in,
2813 s,(^[ #]*NAME=).*,\1"exim4in",
2814 EOF
2815     chmod +x /etc/init.d/exim4in
2816     i /etc/systemd/system/exim4in.service.d/alwaysrestart.conf <<'EOF'
2817 [Unit]
2818 # needed to continually restart
2819 StartLimitIntervalSec=0
2820
2821 [Service]
2822 Restart=always
2823 # time to sleep before restarting a service
2824 RestartSec=20
2825 EOF
2826
2827     i /etc/default/exim4in <<'EOF'
2828 # defaults but no queue runner and alternate config dir
2829 QUEUERUNNER='no'
2830 COMMONOPTIONS='-oP /run/exim4/eximin.pid'
2831 UPEX4OPTS='-d /etc/myexim4'
2832 EOF
2833
2834     echo bk.b8.nz > /etc/mailname
2835     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2836 # man page: is used to build the local_domains list, together with "localhost"
2837 dc_other_hostnames='amnimal.ninja;expertpathologyreview.com;bk.b8.nz'
2838 EOF
2839
2840     ;;
2841   # ** je
2842   je)
2843     echo je.b8.nz > /etc/mailname
2844     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2845 dc_other_hostnames='je.b8.nz'
2846 EOF
2847     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2848     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2849     echo|i /etc/exim4/conf.d/rcpt_local_acl
2850     echo|i /etc/exim4/conf.d/router/880_universal_forward
2851     ;;
2852   # ** not MAIL_HOST|bk|je
2853   *)
2854     # this one should be removed for all non mail hosts, but
2855     # bk and je never become mail_host
2856     echo|i /etc/exim4/conf.d/router/195_dnslookup_vpn
2857
2858     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2859     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2860     echo|i /etc/exim4/conf.d/rcpt_local_acl
2861     echo|i /etc/exim4/conf.d/router/890_backup_copy
2862     echo|i /etc/exim4/conf.d/main/000_local-nn
2863
2864
2865     if $bhost_t; then
2866       cat >>/etc/exim4/conf.d/main/000_local <<EOF
2867 MAIN_TLS_CERTIFICATE = /etc/exim4/certs/$wghost/fullchain.pem
2868 MAIN_TLS_PRIVATEKEY = /etc/exim4/certs/$wghost/privkey.pem
2869 # so we can maintiain the originals of the backups.
2870 # we wouldnt want this if we were dealing with any other
2871 # local deliveries, but we sent all others to the smarthost
2872 # which then strips the headers.
2873 envelope_to_remove = false
2874 return_path_remove = false
2875 EOF
2876     fi
2877
2878     # catches things like cronjob email
2879     i /etc/exim4/conf.d/router/880_universal_forward <<'EOF'
2880 universal_forward:
2881   driver = redirect
2882   domains = +local_domains
2883   data = alerts@iankelling.org
2884 EOF
2885
2886
2887     for unit in ${nn_progs[@]}; do
2888       f=/etc/systemd/system/$unit.service.d/nn.conf
2889       rm -fv $f
2890     done
2891
2892     # dont i dont care if defaultnn section gets left, it wont
2893     # get used.
2894     echo | /a/exe/cedit nn /etc/hosts || [[ $? == 1 ]]
2895     echo | /a/exe/cedit mail /etc/dnsmasq-servers.conf || [[ $? == 1 ]]
2896
2897
2898     if $bhost_t; then
2899       install -d /bu
2900       install -d -g Debian-exim -o Debian-exim -m 771 /bu/md
2901       if [[ -e /bu/md/cur && $(stat -c %u /bu/md/cur) == 1000 ]]; then
2902         chown -R Debian-exim:Debian-exim /bu/md
2903       fi
2904       i /etc/exim4/conf.d/transport/30_backup_maildir <<EOF
2905 # modified debian maildir transport
2906 backup_maildir:
2907   driver = appendfile
2908   directory = /bu/md
2909   delivery_date_add
2910   # note, no return path or envelope added
2911   maildir_format
2912   directory_mode = 0700
2913   mode = 0644
2914   mode_fail_narrower = false
2915 EOF
2916
2917       i /etc/exim4/conf.d/router/870_backup_local <<'EOF'
2918 ### router/900_exim4-config_local_user
2919 #################################
2920
2921 backup_local:
2922   debug_print = "R: local_user for $local_part@$domain"
2923   driver = accept
2924   domains = eximbackup.b8.nz
2925   transport = backup_maildir
2926 EOF
2927
2928       # Bind to wghole to receive mailbackup.
2929       wgholeip=$(sed -rn 's/^ *Address *= *([^/]+).*/\1/p' /etc/wireguard/wghole.conf)
2930       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2931 dc_other_hostnames='eximbackup.b8.nz'
2932 dc_local_interfaces='127.0.0.1;::1;$wgholeip'
2933 EOF
2934
2935       # wghole & thus exim will fail to start without internet connectivity.
2936       i /etc/systemd/system/exim4.service.d/backup.conf <<'EOF'
2937 [Unit]
2938 StartLimitIntervalSec=0
2939
2940 [Service]
2941 Restart=always
2942 RestartSec=20
2943 EOF
2944
2945     else
2946       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2947 # Note: If theres like a temporary problem where mail gets sent to
2948 # one of these hosts, if exim isnt listening, it will be a temporary error
2949 # instead of a permanent 5xx.
2950 dc_local_interfaces='127.0.0.1;::1'
2951 EOF
2952       rm -fv /etc/systemd/system/exim4.service.d/backup.conf
2953     fi
2954     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2955 dc_eximconfig_configtype='smarthost'
2956 dc_smarthost='$smarthost'
2957 EOF
2958
2959     hostname -f |i /etc/mailname
2960     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2961 # The manpage incorrectly states this will do header rewriting, but
2962 # that only happens if we have dc_hide_mailname is set.
2963 dc_readhost='iankelling.org'
2964 # Only used in case of bounces.
2965 dc_localdelivery='maildir_home'
2966 EOF
2967     ;;
2968 esac
2969
2970
2971
2972
2973 # ** $MAILHOST|bk, things that belong at the end
2974 case $HOSTNAME in
2975   $MAIL_HOST|bk)
2976     # config for the non-nn exim
2977     m rsync -ra --delete /etc/exim4/ /etc/myexim4
2978     cat >>/etc/myexim4/conf.d/main/000_local-nn <<'EOF'
2979 # this makes it easier to see which exim is doing what
2980 log_file_path = /var/log/exim4/my%s
2981 EOF
2982
2983     cat >/etc/logrotate.d/myexim <<'EOF'
2984 /var/log/exim4/mymain /var/log/exim4/myreject {
2985         daily
2986         missingok
2987         rotate 1000
2988         delaycompress
2989         notifempty
2990         nocreate
2991 }
2992 /var/log/exim4/mypanic {
2993         size 10M
2994         missingok
2995         rotate 10
2996         compress
2997         delaycompress
2998         notifempty
2999         nocreate
3000 }
3001 EOF
3002
3003     # If we ever wanted to have a separate spool,
3004     # we could do it like this.
3005     #     cat >>/etc/exim4/conf.d/main/000_local-nn <<'EOF'
3006     # spool_directory = /var/spool/myexim4
3007     # EOF
3008     cat >>/etc/myexim4/update-exim4.conf.conf <<'EOF'
3009 dc_eximconfig_configtype='smarthost'
3010 dc_smarthost='nn.b8.nz'
3011 EOF
3012     ;;&
3013   bk)
3014
3015     # config for the non-nn exim
3016     cat >/etc/myexim4/conf.d/main/000_local-nn <<'EOF'
3017 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail2.iankelling.org
3018 EOF
3019     ;;
3020   $MAIL_HOST)
3021     # for bk, we have a exim4in.service that will do this for us.
3022     m update-exim4.conf -d /etc/myexim4
3023     ;;
3024 esac
3025
3026 # * spool dir setup
3027
3028 # ** bind mount setup
3029 # put spool dir in directory that spans multiple distros.
3030 # based on http://www.postfix.org/qmgr.8.html and my notes in gnus
3031 #
3032 dir=/nocow/exim4
3033 sdir=/var/spool/exim4
3034 # we only do this if our system has $dir
3035
3036 # this used to do a symlink, but, in the boot logs, /nocow would get mounted succesfully,
3037 # about 2 seconds later, exim starts, and immediately puts into paniclog:
3038 # honVi-0000u3-82 Failed to create directory "/var/spool/exim4/input": No such file or directory
3039 # so, im trying a bind mount to get rid of that.
3040 if [[ -e /nocow ]]; then
3041   if ! grep -Fx "/nocow/exim4  /var/spool/exim4  none  bind  0 0" /etc/fstab; then
3042     echo "/nocow/exim4  /var/spool/exim4  none  bind  0 0" >>/etc/fstab
3043   fi
3044   i /etc/systemd/system/exim4.service.d/override.conf <<'EOF'
3045 [Unit]
3046 # without local-fs on exim, we get these kind of errors in paniclog on shutdown:
3047 # Failed to create spool file /var/spool/exim4//input//1jCLxz-0008V4-V9-D: Permission denied
3048 After=local-fs.target
3049
3050 [Service]
3051 ExecStartPre=/usr/local/bin/exim-nn-iptables
3052 EOF
3053   if ! mountpoint -q $sdir; then
3054     stopifactive exim4 exim4in
3055     if [[ -L $sdir ]]; then
3056       m rm $sdir
3057     fi
3058     if [[ ! -e $dir && -d $sdir ]]; then
3059       m mv $sdir $dir
3060     fi
3061     if [[ ! -d $sdir ]]; then
3062       m mkdir $sdir
3063       m chmod 000 $sdir # only want it to be used when its mounted
3064     fi
3065     m mount $sdir
3066   fi
3067 fi
3068
3069
3070
3071 # ** exim/spool uid setup
3072 # i have the spool directory be common to distro multi-boot, so
3073 # we need the uid to be the same. 608 cuz it's kind of in the middle
3074 # of the free system uids.
3075 IFS=:; read -r _ _ uid _ < <(getent passwd Debian-exim ||:) ||:; unset IFS
3076 IFS=:; read -r _ _ gid _ < <(getent group Debian-exim ||:) ||:; unset IFS
3077 if [[ ! $uid ]]; then
3078   # from /var/lib/dpkg/info/exim4-base.postinst, plus uid and gid options
3079   m adduser --uid 608 --system --group --quiet --home /var/spool/exim4 \
3080     --no-create-home --disabled-login --force-badname Debian-exim
3081 elif [[ $uid != 608 ]]; then
3082   stopifactive exim4 exim4in
3083   m usermod -u 608 Debian-exim
3084   m groupmod -g 608 Debian-exim
3085   m usermod -g 608 Debian-exim
3086   m find / /nocow -xdev -path ./var/tmp -prune -o -uid $uid -execdir chown -h 608 {} +
3087   m find / /nocow -xdev -path ./var/tmp -prune -o -gid $gid -execdir chgrp -h 608 {} +
3088 fi
3089
3090 # * start / stop services
3091
3092 reifactive dnsmasq nscd
3093
3094 if $reload; then
3095   m systemctl daemon-reload
3096 fi
3097
3098 sysd-prom-fail-install epanicclean
3099 m systemctl --now enable epanicclean
3100
3101 case $HOSTNAME in
3102   je)
3103     /a/exe/web-conf apache2 je.b8.nz
3104     ;;
3105   bk)
3106     /a/exe/web-conf apache2 mail2.iankelling.org
3107     ;;
3108 esac
3109
3110 m /a/bin/ds/mail-cert-cron -1
3111 sre mailcert.timer
3112
3113 case $HOSTNAME in
3114   $MAIL_HOST|bk)
3115     m systemctl --now enable mailnn mailnnroute
3116     ;;&
3117   $MAIL_HOST)
3118     # we use dns to start wg
3119     if $reload; then
3120       sre unbound
3121     else
3122       m systemctl --now enable unbound
3123     fi
3124     ;;&
3125   $MAIL_HOST|bk)
3126     # If these have changes, id rather manually restart it, id rather
3127     # not restart and cause temporary errors
3128     if $reload; then
3129       sre $vpnser
3130     else
3131       m systemctl --now enable $vpnser
3132     fi
3133     if ! systemctl is-active clamav-daemon >/dev/null; then
3134       m systemctl --now enable clamav-daemon
3135       out=$(rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/filesystem/etc/systemd/system/epanicclean.service /etc/systemd/system)
3136       if [[ $out ]]; then
3137         reload=true
3138       fi
3139
3140       # note, this will cause paniclog entries because it takes like 45
3141       # seconds for clamav to start, i use ./epanic-clean to remove
3142       # them.
3143     fi
3144     ;;&
3145   $MAIL_HOST|bk|je)
3146     # start spamassassin/dovecot before exim.
3147     sre dovecot spamassassin
3148     # need to wait a bit before restarting exim, else I
3149     # get a paniclog entry like: spam acl condition: all spamd servers failed
3150     sleep 3
3151     m systemctl --now enable mailclean.timer
3152     ;;&
3153   $MAIL_HOST)
3154     # < 2.1 (eg: in t9), uses a different data format which required manual
3155     # migration. dont start if we are running an old version.
3156     if dpkg --compare-versions $(dpkg -s radicale | awk '$1 == "Version:" { print $2 }') ge 2.1; then
3157       m systemctl --now enable radicale
3158     fi
3159     ;;&
3160 esac
3161
3162 # last use of $reload happens in previous block
3163 rm -f /var/local/mail-setup-reload
3164
3165
3166 case $HOSTNAME in
3167   $MAIL_HOST|bk|je|li)
3168     # on li, these are never started, except $vpnser
3169     :
3170     ;;
3171   *)
3172     soff radicale mailclean.timer dovecot spamassassin $vpnser mailnn clamav-daemon
3173     ;;
3174 esac
3175
3176 sre exim4
3177
3178 case $HOSTNAME in
3179   $MAIL_HOST)
3180     m systemctl --now enable mailbindwatchdog
3181     ;;
3182   *)
3183     soff mailbindwatchdog
3184     ;;
3185 esac
3186
3187
3188 case $HOSTNAME in
3189   bk) sre exim4in ;;
3190 esac
3191
3192 # * mail monitoring / testing
3193
3194 # note, to test clamav, send an email with body that only contains
3195 # https://en.wikipedia.org/wiki/EICAR_test_file
3196 # which set malware_name to Eicar-Signature
3197 case $HOSTNAME in
3198   $MAIL_HOST|bk|je)
3199     # note: cronjob "ian" also does some important monitoring
3200     # todo: this will sometimes cause an alert because mailtest-check will run
3201     # before we have setup network namespace and spamassassin
3202     i /etc/cron.d/mailtest <<EOF
3203 SHELL=/bin/bash
3204 PATH=/usr/bin:/bin:/usr/local/bin
3205 MAILTO=daylert@iankelling.org
3206 */5  * * * *   $u send-test-forward |& log-once send-test-forward
3207 */10 * * * *   root chmod -R g+rw /m/md/bounces |& log-once -1 bounces-chmod
3208 # if a bounce happened yesterday, dont let it slip through the cracks
3209 8   1 * * *   root export MAILTO=alerts@iankelling.org; [[ -s /var/log/exim4/mainlog.1 ]] && awk '\$5 == "**"' /var/log/exim4/mainlog.1
3210 EOF
3211
3212
3213     m sudo rsync -ahhi --chown=root:root --chmod=0755 \
3214       /b/ds/mailtest-check /b/ds/check-remote-mailqs /usr/local/bin/
3215     i /etc/systemd/system/mailtest-check.service <<'EOF'
3216 [Unit]
3217 Description=mailtest-check
3218 After=local-fs.target
3219 StartLimitIntervalSec=0
3220
3221 [Service]
3222 Type=simple
3223 ExecStart=/usr/local/bin/mailtest-check slow
3224 Restart=always
3225 RestartSec=60
3226
3227 [Install]
3228 WantedBy=graphical.target
3229 EOF
3230     sysd-prom-fail-install mailtest-check
3231     sre mailtest-check
3232     ;;&
3233   $MAIL_HOST)
3234     test_froms=(ian@iankelling.org z@zroe.org iank@gnu.org)
3235     test_tos=(testignore@expertpathologyreview.com testignore@je.b8.nz testignore@amnimal.ninja jtuttle@gnu.org)
3236
3237     cat >>/etc/cron.d/mailtest <<EOF
3238 0   13 * * *  root echo "1pm alert. You are not in the matrix."
3239 2   * * * *   root check-remote-mailqs |& log-once check-remote-mailqs
3240 EOF
3241     ;;&
3242   bk)
3243     test_froms=(testignore@amnimal.ninja testignore@expertpathologyreview.com)
3244     test_tos=(testignore@iankelling.org testignore@je.b8.nz)
3245     # We dont need to send from different addresses to the same
3246     # address. this breaks down our nice elegant logic of building up
3247     # froms and tos , so I just handle expertpath in a special case
3248     # below and set the to: to be testignore@zroe.org.  If we did sent
3249     # that way, it would also mess up our mailtest-check logic that
3250     # finds which messages to check.
3251     # for example: from testignore@amnimal.ninja to: testignore@iankelling.org testignore@zroe.org
3252     # that would become 2 messages and we'd only check 1.
3253     ;;&
3254   je)
3255     test_froms=(testignore@je.b8.nz)
3256     test_tos=(testignore@iankelling.org testignore@zroe.org testignore@expertpathologyreview.com testignore@amnimal.ninja)
3257     ;;&
3258   $MAIL_HOST|bk|je)
3259
3260     # Dont put these test messages into the sent folder or else it will
3261     # overwhelm it, plus i dont want to save a copy at all.
3262     rm -f /etc/exim4/ignore-sent
3263     for t in ${test_tos[@]}; do
3264       echo $t >> /etc/exim4/ignore-sent
3265     done
3266
3267     cat >/usr/local/bin/send-test-forward <<'EOF'
3268 #!/bin/bash
3269 # we remove from the queue older than 4.3 minutes since we send every 5 minutes.
3270 olds=(
3271 $(/usr/sbin/exiqgrep -o 260 -i -r '^(testignore@(iankelling\.org|zroe\.org|expertpathologyreview\.com|amnimal\.ninja|je\.b8\.nz)|jtuttle@gnu\.org)$')
3272 )
3273 if (( ${#olds[@]} )); then
3274   /usr/sbin/exim -Mrm "${olds[@]}" >/dev/null
3275 fi
3276 EOF
3277     for test_from in ${test_froms[@]}; do
3278
3279       test_to=${test_tos[0]}
3280       for t in ${test_tos[@]:1}; do
3281         test_to+=", $t"
3282       done
3283       case $test_from in
3284         testignore@expertpathologyreview.com)
3285           test_to=testignore@zroe.org
3286           ;;
3287       esac
3288
3289       cat >>/usr/local/bin/send-test-forward <<EOFOUTER
3290 /usr/sbin/exim -f $test_from -t <<EOF
3291 From: $test_from
3292 To: $test_to
3293 Subject: test \$(date +%Y-%m-%dT%H:%M:%S%z) \$EPOCHSECONDS
3294
3295 /usr/local/bin/send-test-forward
3296 EOF
3297 EOFOUTER
3298     done
3299     m chmod +x /usr/local/bin/send-test-forward
3300     ;;
3301   *)
3302     soff mailtest-check.service
3303     rm -fv /etc/cron.d/mailtest /var/lib/prometheus/node-exporter/mailtest-check.prom*
3304     ;;
3305 esac
3306
3307
3308
3309 # * misc
3310 m sudo -u $u mkdir -p /home/$u/.cache
3311 set -- /m/mucache /home/$u/.cache/mu /m/.mu /home/$u/.mu
3312 while (($#)); do
3313   target=$1
3314   f=$2
3315   shift 2
3316   if [[ ! -L $f ]]; then
3317     if [[ -e $f ]]; then
3318       rm -rf $f
3319     fi
3320     m sudo -u $u ln -sf -T $target $f
3321   fi
3322 done
3323
3324
3325 # /etc/alias setup is debian specific, and exim postinst script sets up
3326 # an /etc/alias from root to the postmaster, based on the question
3327 # exim4-config exim4/dc_postmaster, as long as there exists an entry for
3328 # root, or there was no preexisting aliases file. postfix won\'t set up
3329 # a root to $postmaster alias if it\'s already installed. Easiest to
3330 # just set it ourselves.
3331
3332 # debconf question for postmaster:
3333 # Mail for the 'postmaster', 'root', and other system accounts needs to be redirected
3334 # to the user account of the actual system administrator.
3335 # If this value is left empty, such mail will be saved in /var/mail/mail, which is not
3336 # recommended.
3337 # Note that postmaster\'s mail should be read on the system to which it is directed,
3338 # rather than being forwarded elsewhere, so (at least one of) the users listed here
3339 # should not redirect their mail off this machine. A 'real-' prefix can be used to
3340 # force local delivery.
3341 # Multiple user names need to be separated by spaces.
3342 # Root and postmaster mail recipient:
3343
3344 m exit 0
3345 :
3346
3347 # Local Variables:
3348 # eval: (outline-minor-mode)
3349 # outline-regexp: "\\( *\\)# [*]\\{1,8\\} "
3350 # End:
3351 # this is combined with defining outline-level in init.el