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 392 # but its outdated.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