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

   1 #!/bin/bash
   2 # * intro
   3 # Copyright (C) 2019 Ian Kelling
   4 # SPDX-License-Identifier: AGPL-3.0-or-later
   5
   6
   7 # todo: setup an alert for bouncing test emails.
   8
   9 # todo: bounces to my fsf mail can come from fsf@iankelling.org,
  10 # think about making bounces go from the original address.
  11
  12 # todo: add a prometheus alert for dovecot.
  13
  14 # todo: handle errors like this:
  15 # Mar 02 12:44:26 kw systemd[1]: exim4.service: Found left-over process 68210 (exim4) in control group while starting unit. Ignoring.
  16 # Mar 02 12:44:26 kw systemd[1]: This usually indicates unclean termination of a previous run, or service implementation deficiencies.
  17 #eg: on eggs, on may 1st, ps grep for exim, 2 daemons running. 1 leftover from a month ago
  18 #Debian-+  1954     1  0 36231 11560   4 Apr02 ?        00:40:25 /usr/sbin/exim4 -bd -q30m
  19 #Debian-+ 23058  1954  0 36821 10564   0 20:38 ?        00:00:00 /usr/sbin/exim4 -bd -q30m
  20
  21 #  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.
  22 #  todo: consider hardening cups listening on 0.0.0.0
  23 #  todo: stop/disable local apache, and rpc.mountd, and kdeconnect when not in use.
  24
  25 # todo:  hosts should only allow external mail that is authed and
  26 # destined for backup route. it is a minor issue since traffic is
  27 # limited to the wghole network.
  28
  29 # todo: emailing info@amnimal.ninja produces a bounce, user doesn't exist
  30 # instead of a simple rejection like it should.
  31
  32 # todo: run mailping test after running, or otherwise
  33 # clear out terminal alert
  34
  35 # todo: disable postgrey
  36
  37 # todo: in testforward-check, we should also look
  38
  39 # todo: test that bounces dont help create valid mailtest-check
  40
  41 # todo: move mail stuff in distro-end into this file
  42
  43 # todo: consider rotating dkim & publishing key so every past email I sent
  44 # isnt necessarily signed
  45
  46 # todo: consider how to get clamav out of Debian-exim group
  47 # so it cant read/write the whole mail spool, for better
  48 # security.
  49
  50 # todo: create a cronjob to update or warn on expiring dnssec keys
  51
  52 # todo: we should test failed mail daily or so
  53 # failed cronjob, failed sysd-log-once,
  54 # a local bounce from a cronjob, a local bounce
  55 # to a bad remote address, perhaps a local failure
  56 # when the sending daemon is down.
  57 # And send an alert email if no alerts have been sent
  58 # in 2 or 3 days or something. todo, test cron mail on li.
  59
  60 # todo: look at mailinabox extra dns records, note these changelogs:
  61 # - 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.
  62 # - 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.
  63 #
  64
  65 # todo: mailtest-check failure on remote hosts is not going to alert me.
  66 # sort that out.
  67 # todo: test mail failure as well as success.
  68 #
  69 # todo: validate that mailtest-check is doing dnsbl checks.
  70
  71 # background: I want to run exim in a network namespace so it can send
  72 # and receive through a vpn. This is needed so it can do ipv6, because
  73 # outside the namespace if we dont have ipv6, to send ipv6 through the
  74 # vpn, we have to send all our ipv6 through the vpn. I did this for a
  75 # long time, it was fine, but it causes various pains, like increased
  76 # latency, increased recaptcha because my ip is from a data center, just
  77 # various issues I dont want on all the time. The problem with the
  78 # namespace is that all kinds of programs want to invoke exim, but they
  79 # wont be in the namespace. I could replace exim with a wrapper that
  80 # jumps into the namespace, i tried that, it works fine.  One remaining
  81 # problem was that I would have needed to hook into exim upgrades to
  82 # move exim and replace it with my wrapper script. Also, my script to
  83 # join the namespace is not super reliable because it uses a pgrep.
  84 # Instead, I should have created a systemd service for a process that
  85 # will never die and just writes its pid somewhere convenient.
  86 # That implementation
  87 # is below here:
  88 #
  89 # sudoers:
  90 # user ALL=(ALL) /usr/sbin/exim4
  91 #
  92 # move exim4 to eximian, use this script for exim4:
  93 #
  94 # #!/bin/bash
  95 # if ip a show veth1-mail &>/dev/null; then
  96 #   /usr/sbin/eximian "$@"
  97 #   exit
  98 # fi
  99 # dosudo=false
 100 # if [[ $USER && $USER != root ]]; then
 101 #   dosudo=true
 102 # fi
 103 # pid=$(pgrep -f "/usr/sbin/openvpn .* --config /etc/openvpn/.*mail.conf")
 104 # if $dosudo; then
 105 #   sudo nsenter -t $pid -n -m sudo -u $USER /usr/sbin/eximian "$@"
 106 # else
 107 #   nsenter -t $pid -n -m /usr/sbin/eximian "$@"
 108 # fi
 109 # ## end script
 110 #
 111 # an alternate solution: there is a small setguid program for
 112 # network namespaces in my bookmarks.
 113 #
 114 # However, the solution I went with is: have 2 exim
 115 # configs. A nonstandard location for the daemon that runs
 116 # in the namespace. For all other invocations, it uses
 117 # the default config location, which is altered to be
 118 # in a smarthost config which sends mail to the deaemon.
 119 #
 120 # I have a bash function, enn to invoke exim like the daemon is running.
 121 # and mailbash to just enter its network namespace.
 122
 123 if [ -z "$BASH_VERSION" ]; then echo "error: shell is not bash" >&2; exit 1; fi
 124
 125 shopt -s nullglob
 126
 127 if [[ -s /usr/local/lib/err ]]; then
 128   source /usr/local/lib/err
 129 elif [[ -s /a/bin/errhandle/err ]]; then
 130   source /a/bin/errhandle/err
 131 else
 132   err "no err tracing script found"
 133 fi
 134 source /a/bin/distro-functions/src/identify-distros
 135 source /a/bin/distro-functions/src/package-manager-abstractions
 136
 137 # has nextcloud_admin_pass in it
 138 f=/p/c/machine_specific/$HOSTNAME/mail
 139 if [[ -e $f ]]; then
 140   # shellcheck source=/p/c/machine_specific/bk/mail
 141   source $f
 142 fi
 143
 144
 145 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
 146
 147 # note, this is hardcoded in /etc/exim4/conf.d/main/000_local
 148 u=$(id -nu 1000)
 149
 150
 151 usage() {
 152   cat <<EOF
 153 Usage: ${0##*/} anything_here_to_debug
 154 Setup exim4 & dovecot & related things
 155
 156 -h|--help  Print help and exit.
 157 EOF
 158   exit $1
 159 }
 160
 161 # debug output if we pass any arg
 162 if (( $# )); then
 163   set -x
 164 fi
 165
 166
 167 ####### instructions for icedove #####
 168 # Incoming mail server: mail.iankelling.org, port 143, username iank, connection security starttls, authentication method normal password,
 169 # then click advanced so it accepts it.
 170 # we could also just use 127.0.0.1 with no ssl
 171 #
 172 # hamburger -> preferences -> preferences -> advanced tab -> config editor button -> security.ssl.enable_ocsp_must_staple = false
 173 # background: dovecot does not yet have ocsp stapling support
 174 # reference: https://community.letsencrypt.org/t/simple-guide-using-lets-encrypt-ssl-certs-with-dovecot/2921
 175 #
 176 # for phone, k9mail, fdroid, same thing but username alerts, pass in ivy-pass.
 177 # also, bk.b8.nz for secondary alerts, username is iank. same alerts pass.
 178 # fetching mail settings: folder poll frequency 10 minutes.
 179 # account settings, fetching mail, push folders: All. Then disable the persistent notification.
 180 #######
 181
 182
 183 # * perstent password instructions
 184 # Note: for cert cron, we need to manually run first to accept known_hosts
 185
 186 # # exim passwords:
 187 # # for hosts which have all private files I just use the same user
 188 # # for other hosts, each one get\'s their own password.
 189 # # for generating secure pass, and storing for server too:
 190 # f=$(mktemp)
 191 # host=tp
 192 # apg -m 50 -x 70 -n 1 -a 1 -M CLN >$f
 193 # s sed -i "/^$host:/d" /p/c/filesystem/etc/exim4/passwd
 194 # echo "$host:$(mkpasswd -m sha-512 -s <$f)" >>/p/c/filesystem/etc/exim4/passwd
 195 # #reference: exim4_passwd_client(5)
 196 # dir=/p/c/machine_specific/$host/filesystem/etc/exim4
 197 # mkdir -p $dir
 198 # echo "mail.iankelling.org:$host:$(<$f)" > $dir/passwd.client
 199 # # then run this script
 200
 201 # # dovecot password, i just need 1 as I\'m the only user
 202 # mkdir /p/c/filesystem/etc/dovecot
 203 # echo "iank:$(doveadm pw -s SHA512-CRYPT)::::::" >>/p/c/filesystem/etc/dovecot/users
 204
 205 ####### end perstent password instructions ######
 206
 207
 208 # * dkim dns
 209 # # Remove 1 level of comments in this section, set the domain var
 210 # # for the domain you are setting up, then run this and copy dns settings
 211 # # into dns.
 212 # domain=iankelling.org
 213 # c /p/c/filesystem/etc/exim4
 214 # # this has several bugs addressed in comments, but it was helpful
 215 # # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
 216
 217 # openssl genrsa -out $domain-private.pem 2048
 218 # # Then, to get the public key strings to put in bind:
 219
 220 # # selector is needed for having multiple keys for one domain.
 221 # # I dun do that, so just use a static one: li
 222 # # Debadmin page does not have v=, fastmail does, and this
 223 # # says it\'s recommended in 3.6.1, default is DKIM1 anyways.
 224 # # https://www.ietf.org/rfc/rfc6376.txt
 225 # # Join and print all but first and last line.
 226 # # last line: swap hold & pattern, remove newlines, print.
 227 # # lines 2+: append to hold space
 228 # echo "bind txt record: remember to truncate $domain so its relative to the bind zone"
 229 # cat <<EOF
 230 # a._domainkey.$domain  TXT     (
 231 # "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')" )
 232 # EOF
 233 # # sed explanation: skip the first few lines, then put them into the hold space, then
 234 # # on the last line, back to the patern space, remove the newlines, then add a newline
 235 # # at the last char - 240, because bind txt records need strings <=255 chars,
 236 # # other dkim stuff at the begining is is 25 chars, and the pubkey is 393, so this
 237 # # leaves us a bit of extra room at the end and a bunch at the beginning.
 238
 239 # # selector was also put into /etc/exim4/conf.d/main/000_local,
 240
 241 # * dmarc dns
 242
 243 # # 2017-02 dmarc policies:
 244 # # host -t txt _dmarc.gmail.com
 245 # # yahoo: p=reject, hotmail: p=none, gmail: p=none, fastmail none for legacy reasons
 246 # # there were articles claiming gmail would be  changing
 247 # # to p=reject, in early 2017, which didn\'t happen. I see no sources on them. It\'s
 248 # # expected to cause problems
 249 # # with a few old mailing lists, copying theirs for now.
 250 #
 251 # echo "dmarc dns, name: _dmarc value: v=DMARC1; p=none; rua=mailto:mailauth-reports@$domain"
 252
 253 # * other dns
 254
 255 # # 2017-02 spf policies:
 256 # # host -t txt lists.fedoraproject.org
 257 # # google ~all, hotmail ~all, yahoo: ?all, fastmail ?all, outlook ~all
 258 # # i include fastmail\'s settings, per their instructions,
 259 # # and follow their policy. In mail in a box, or similar instructions,
 260 # # I\'ve seen recommended to not use a restrictive policy.
 261
 262 # # to check if dns has updated, you do
 263 # host -a mesmtp._domainkey.$domain
 264
 265 # # mx records,
 266 # # setting it to iankelling.org would work the same, but this
 267 # # is more flexible, I could change where mail.iankelling.org pointed.
 268 # cat <<'EOF'
 269 # mx records, 2 records each, for * and empty domain
 270 # pri 10 mail.iankelling.org
 271 # EOF
 272
 273 # # dnssec
 274 # from brc2, run dnsecgen then dsign, update named.local.conf, publish keys to registrar
 275
 276 # * functions & constants
 277
 278 pre="${0##*/}:"
 279 m() { printf "$pre %s\n"  "$*"; "$@"; }
 280 e() { printf "$pre %s\n"  "$*"; }
 281 err() { printf "$pre %s\n"  "$*" >&2; exit 1; }
 282
 283 reload=false
 284 # This file is so if we fail in the middle and rerun, we dont lose state
 285 if [[ -e /var/local/mail-setup-reload ]]; then
 286   reload=true
 287 fi
 288 i() { # install file
 289   local tmp tmpdir dest="$1"
 290   local base="${dest##*/}"
 291   local dir="${dest%/*}"
 292   if [[ $dir != "$base" ]]; then
 293     # dest has a directory component
 294     mkdir -p "$dir"
 295   fi
 296   ir=false # i result
 297   tmpdir=$(mktemp -d)
 298   cat >$tmpdir/"$base"
 299   tmp=$(rsync -ic $tmpdir/"$base" "$dest")
 300   if [[ $tmp ]]; then
 301     printf "%s\n" "$tmp"
 302     ir=true
 303     if [[ $dest == /etc/systemd/system/* ]]; then
 304       touch /var/local/mail-setup-reload
 305       reload=true
 306     fi
 307   fi
 308   rm -rf $tmpdir
 309 }
 310 setini() {
 311   key="$1" value="$2" section="$3"
 312   file="/etc/radicale/config"
 313   sed -ri "/ *\[$section\]/,/^ *\[[^]]+\]/{/^\s*${key}[[:space:]=]/d};/ *\[$section\]/a $key = $value" "$file"
 314 }
 315 soff () {
 316   for service; do
 317     # ignore services that dont exist
 318     if systemctl cat $service &>/dev/null; then
 319       m systemctl disable --now $service
 320     fi
 321   done
 322 }
 323 sre() {
 324   for service; do
 325     m systemctl restart $service
 326     m systemctl enable $service;
 327   done
 328 }
 329 mailhost() {
 330   [[ $HOSTNAME == "$MAIL_HOST" ]]
 331 }
 332 e() { printf "%s\n" "$*"; }
 333 reifactive() {
 334   for service; do
 335     if systemctl is-active $service >/dev/null; then
 336       m systemctl restart $service
 337     fi
 338   done
 339 }
 340 stopifactive() {
 341   for service; do
 342     if systemctl is-active $service >/dev/null; then
 343       m systemctl stop $service
 344     fi
 345   done
 346 }
 347
 348 mxhost=mx.iankelling.org
 349 mxport=587
 350 forward=$u@$mxhost
 351
 352 # old setup. left as comment for example
 353 # mxhost=mail.messagingengine.com
 354 # mxport=587
 355 # forward=ian@iankelling.org
 356
 357 smarthost="$mxhost::$mxport"
 358 uhome=$(eval echo ~$u)
 359
 360 # Somehow on one machine, a file got written with 664 perms.
 361 # just being defensive here.
 362 umask 0022
 363
 364 source /a/bin/bash_unpublished/source-state
 365 if [[ ! $MAIL_HOST ]]; then
 366   err "\$MAIL_HOST not set"
 367 fi
 368
 369 bhost_t=false
 370 case $HOSTNAME in
 371   $MAIL_HOST) : ;;
 372   kd|frodo|x2|x3|kw|sy|bo)
 373     bhost_t=true
 374     ;;
 375 esac
 376
 377
 378 # * Install universal packages
 379
 380
 381 # installs epanicclean iptables-exim ip6tables-exim
 382 /a/bin/ds/install-my-scripts
 383
 384 if [[ $(debian-codename-compat) == bionic ]]; then
 385   cat >/etc/apt/preferences.d/spamassassin <<'EOF'
 386 Package: spamassassin sa-compile spamc
 387 Pin: release n=focal,o=Ubuntu
 388 Pin-Priority: 500
 389 EOF
 390 fi
 391
 392 # light version of exim does not have sasl auth support.
 393 # note: for bitfolk hosts, unbound has important config with conflink.
 394 pi-nostart exim4 exim4-daemon-heavy spamassassin unbound clamav-daemon wireguard
 395
 396 # note: pyzor debian readme says you need to run some initialization command
 397 # but its outdated.
 398 pi spf-tools-perl p0f postgrey pyzor razor jq moreutils certbot fail2ban
 399 case $HOSTNAME in
 400   je) : ;;
 401   # not included due to using wireguard: openvpn
 402   *) pi wget git unzip iptables ;;
 403 esac
 404 # bad packages that sometimes get automatically installed
 405 pu openresolv resolvconf
 406
 407 soff openvpn
 408
 409
 410 if [[ $(debian-codename) == etiona ]]; then
 411   # ip6tables stopped loading on boot. openvpn has reduced capability set,
 412   # so running iptables as part of openvpn startup wont work. This should do it.
 413   pi iptables-persistent
 414   cat >/etc/iptables/rules.v6 <<'EOF'
 415 *mangle
 416 COMMIT
 417 *nat
 418 COMMIT
 419 EOF
 420   # load it now.
 421   m ip6tables -S >/dev/null
 422 fi
 423
 424 # our nostart pi fails to avoid enabling
 425
 426
 427 # * Mail clean cronjob
 428
 429 i /etc/systemd/system/mailclean.timer <<'EOF'
 430 [Unit]
 431 Description=Run mailclean daily
 432
 433 [Timer]
 434 OnCalendar=monthly
 435
 436 [Install]
 437 WantedBy=timers.target
 438 EOF
 439
 440 i /etc/systemd/system/mailclean.service <<EOF
 441 [Unit]
 442 Description=Delete and archive old mail files
 443 After=multi-user.target
 444
 445 [Service]
 446 User=$u
 447 Type=oneshot
 448 ExecStart=/usr/local/bin/sysd-mail-once mailclean /a/bin/distro-setup/mailclean
 449 EOF
 450
 451 # * postgrey
 452
 453
 454 i /etc/default/postgrey <<'EOF'
 455 POSTGREY_OPTS="--exim --unix=/var/run/postgrey/postgrey.sock --retry-window=4 --max-age=60"
 456 EOF
 457
 458 # * clamav
 459
 460 m usermod -a -G Debian-exim clamav
 461
 462 i /etc/systemd/system/clamav-daemon.service.d/fix.conf <<EOF
 463 [Service]
 464 ExecStartPre=-/bin/mkdir /var/run/clamav
 465 ExecStartPre=/bin/chown clamav /var/run/clamav
 466 EOF
 467
 468 # * mail vpn config
 469
 470 # old.
 471 #vpnser=mailvpn.service
 472 # todo: this hangs if it cant resolv the endpoint. we
 473 # want it to just retry in the background.
 474 vpnser=wg-quick@wgmail.service
 475
 476 case $HOSTNAME in
 477   $MAIL_HOST)
 478     rsync -aiSAX --chown=root:root --chmod=g-s /p/c/filesystem/etc/wireguard/ /etc/wireguard
 479     bindpaths="/etc/127.0.0.1-resolv:/run/systemd/resolve /etc/basic-nsswitch:/etc/resolved-nsswitch:norbind"
 480     ;;&
 481   bk)
 482     bindpaths="/etc/10.173.8.1-resolv:/etc/127.0.0.1-resolv"
 483     ;;&
 484   *)
 485     d=/p/c/machine_specific/$HOSTNAME/filesystem/etc/wireguard/
 486     if [[ -d $d ]]; then
 487       rsync -aiSAX --chown=root:root --chmod=g-s $d  /etc/wireguard
 488     fi
 489     ;;
 490 esac
 491
 492 case $HOSTNAME in
 493   li) : ;;
 494   *)
 495     i /etc/systemd/system/wg-quick@wgmail.service.d/override.conf <<EOF
 496 [Unit]
 497 Requires=mailnn.service
 498 JoinsNamespaceOf=mailnn.service
 499 BindsTo=mailnn.service
 500 StartLimitIntervalSec=0
 501
 502 [Service]
 503 PrivateNetwork=true
 504 # i dont think we need any of these, but it doesnt hurt to stay consistent
 505 BindPaths=$bindpaths
 506
 507 Restart=on-failure
 508 RestartSec=20
 509 EOF
 510     ;;
 511 esac
 512
 513
 514 # https://selivan.github.io/2017/12/30/systemd-serice-always-restart.html
 515 i /etc/systemd/system/mailvpn.service <<EOF
 516 [Unit]
 517 Description=OpenVPN tunnel for mail
 518 After=syslog.target network-online.target mailnn.service
 519 Wants=network-online.target
 520 Documentation=man:openvpn(8)
 521 Documentation=https://community.openvpn.net/openvpn/wiki/Openvpn24ManPage
 522 Documentation=https://community.openvpn.net/openvpn/wiki/HOWTO
 523 # needed to continually restatr
 524 JoinsNamespaceOf=mailnn.service
 525 BindsTo=mailnn.service
 526 StartLimitIntervalSec=0
 527
 528 [Service]
 529 Type=notify
 530 RuntimeDirectory=openvpn-client
 531 RuntimeDirectoryMode=0710
 532 WorkingDirectory=/etc/openvpn/client
 533 ExecStart=/usr/sbin/openvpn --suppress-timestamps --nobind --config /etc/openvpn/client/mail.conf
 534 #CapabilityBoundingSet=CAP_IPC_LOCK CAP_NET_ADMIN CAP_NET_RAW CAP_SETGID CAP_SETUID CAP_SYS_CHROOT CAP_DAC_OVERRIDE
 535 LimitNPROC=10
 536 # DeviceAllow=/dev/null rw
 537 # DeviceAllow=/dev/net/tun rw
 538 PrivateNetwork=true
 539 # in the network namespace, we cant connect to systemd-resolved on 127.0.0.53,
 540 # because of
 541 # https://unix.stackexchange.com/questions/445782/how-to-allow-systemd-resolved-to-listen-to-an-interface-other-than-loopback
 542 # there is a workaround there, but i dont think its really worth it,
 543 # the mail server is fine with a static dns anyways.
 544 # This thread is also interesting,
 545 # https://github.com/slingamn/namespaced-openvpn/issues/7
 546 # todo: the iptables rule at the bottom could be useful to prevent
 547 # dns from leaking in my network namespaced vpn.
 548 # I also like the idea of patching systemd-resolved so it
 549 # will listen on other interfaces, but its not worth my time.
 550 BindPaths=$bindpaths
 551 Restart=always
 552 # time to sleep before restarting a service
 553 RestartSec=20
 554
 555 [Install]
 556 WantedBy=multi-user.target
 557 EOF
 558
 559 i /etc/systemd/system/mailnnroute.service <<'EOF'
 560 [Unit]
 561 Description=Network routing for mailnn
 562 After=syslog.target network-online.target mailnn.service
 563 Wants=network-online.target
 564 JoinsNamespaceOf=mailnn.service
 565 BindsTo=mailnn.service
 566 StartLimitIntervalSec=0
 567
 568 [Service]
 569 Type=simple
 570 RemainAfterExit=true
 571 PrivateNetwork=true
 572 ExecStart=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns -n 10.173.8 start mail
 573 ExecStop=/usr/bin/flock -w 20 /tmp/newns.flock /a/bin/newns/newns stop mail
 574 Restart=always
 575 RestartSec=20
 576
 577
 578 [Install]
 579 WantedBy=multi-user.target
 580 EOF
 581
 582 #
 583 i /etc/systemd/system/mailnn.service <<'EOF'
 584 [Unit]
 585 Description=Network Namespace for mail vpn service that will live forever and cant fail
 586 After=syslog.target network-online.target
 587 Wants=network-online.target
 588
 589 [Service]
 590 Type=simple
 591 PrivateNetwork=true
 592 ExecStart=/bin/sleep infinity
 593
 594 [Install]
 595 WantedBy=multi-user.target
 596 EOF
 597
 598 i /etc/systemd/system/mailbindwatchdog.service <<EOF
 599 [Unit]
 600 Description=Watchdog to restart services relying on systemd-resolved dir
 601 After=syslog.target network-online.target
 602 Wants=network-online.target
 603 BindsTo=mailnn.service
 604
 605 [Service]
 606 Type=simple
 607 ExecStart=/usr/local/bin/mailbindwatchdog $vpnser ${nn_progs[@]} unbound.service radicale.service
 608 Restart=always
 609 # time to sleep before restarting a service
 610 RestartSec=10
 611
 612 [Install]
 613 WantedBy=multi-user.target
 614 EOF
 615
 616
 617
 618 # old service name
 619 rm -fv /etc/systemd/system/openvpn-client-mail@.service
 620
 621 # We use a local unbound because systemd-resolved wont accept our
 622 # request, it will only listen to 127.0.0.53 in the main network
 623 # namespace, and rejected feature requests to change that (although I
 624 # could change the code and recompile), but anyways, that could answer
 625 # with things specific to the lan that aren't applicable in this
 626 # namespace, and since unbound is a recursive resolver, it means we just
 627 # use our own ip against dnsbl rate limits.
 628 #
 629 # If we ever notice this change, chattr +i on it
 630 # trust-ad is used in t10+, glibc 2.31
 631
 632 i /etc/127.0.0.1-resolv/stub-resolv.conf <<'EOF'
 633 nameserver 127.0.0.1
 634 options edns0 trust-ad
 635 EOF
 636
 637 i /etc/127.0.0.53-resolv/stub-resolv.conf <<'EOF'
 638 nameserver 127.0.0.53
 639 options edns0 trust-ad
 640 EOF
 641
 642
 643 i /etc/10.173.8.1-resolv/stub-resolv.conf <<'EOF'
 644 nameserver 10.173.8.1
 645 options edns0 trust-ad
 646 EOF
 647
 648 # this is just a bug fix for trisquel.
 649 f=/etc/apparmor.d/usr.sbin.unbound
 650 line="/usr/sbin/unbound flags=(attach_disconnected) {"
 651 if ! grep -qFx "$line" $f; then
 652   badline="/usr/sbin/unbound {"
 653   if ! grep -qFx "$badline" $f; then
 654     err expected line in $f not found
 655   fi
 656   sed -i "s,^$badline$,$line," $f
 657   if systemctl is-active apparmor &>/dev/null; then
 658     m systemctl reload apparmor
 659   fi
 660 fi
 661
 662 # note: anything added to nn_progs needs corresponding rm
 663 # down below in the host switch
 664 nn_progs=(exim4)
 665 if mailhost; then
 666   # Note dovecots lmtp doesnt need to be in the same nn to accept delivery.
 667   # Its in the nn so remote clients can connect to it.
 668   nn_progs+=(spamassassin dovecot)
 669 fi
 670
 671 case $HOSTNAME in
 672   $MAIL_HOST)
 673     # todo, should this be after vpn service
 674     i /etc/systemd/system/unbound.service.d/nn.conf <<EOF
 675 [Unit]
 676 After=mailnn.service
 677 JoinsNamespaceOf=mailnn.service
 678 BindsTo=mailnn.service
 679 StartLimitIntervalSec=0
 680
 681 [Service]
 682 PrivateNetwork=true
 683 # note the nsswitch bind is actually not needed for bk, but
 684 # its the same file so it does no harm.
 685 BindPaths=$bindpaths
 686
 687 Restart=always
 688 RestartSec=20
 689 EOF
 690
 691     # sooo, there are a few ways to get traffic from the mail network
 692     # namespace to go over the wghole.
 693     #
 694     #1: unify the mail vpn and wghole
 695     # into 1 network.  this seems simple and logical, so I'm doing it.
 696     # One general downside is tying things together, if I need to mess
 697     # with one thing, it breaks the other. Oh well for now.
 698     #
 699     # 2. We can route 10.5.3.0/24 out of the mail nn and nat it into wghole.
 700     #
 701     # 3. We can setup the routing to happen on li, which seemed like I
 702     # just needed to add 10.8.0.4/24 to AllowedIPs in at least the
 703     # wghole clients, but I think that is kind of hacky and breaks ipv4
 704     # routing within the mailvpn, it happened to work just because exim
 705     # prefers ipv6 and that was also available in the mailvpn.
 706     #
 707     # 4. Put the hole interface into the mail network namespace. This
 708     # doesn't work if the mail vpn is wg.  For openvpn, it bypasses the
 709     # vpn routing and establishes a direct connection.  I only use the
 710     # hole vpn for randomish things, it should be fine to join the mail
 711     # nn for that. There should be some way to fix the routing issue
 712     # by doing manual routing, but that doesn't seem like a good use of time.
 713     # relevant:
 714     # https://www.wireguard.com/netns/#
 715     #
 716     # for wireguard debugging
 717     # echo module wireguard +p > /sys/kernel/debug/dynamic_debug/control
 718     # dmesg -w
 719
 720     ;;&
 721   $MAIL_HOST|bk)
 722     for unit in ${nn_progs[@]}; do
 723       i /etc/systemd/system/$unit.service.d/nn.conf <<EOF
 724 [Unit]
 725
 726 # Wants appears better than requires because with requires,
 727 # if the vpnser fails to start, this service won't get run at
 728 # all, even if the vpnser starts on an automatic restart.
 729
 730 Wants=$vpnser
 731 After=network.target mailnn.service $vpnser
 732 JoinsNamespaceOf=mailnn.service
 733 BindsTo=mailnn.service
 734 StartLimitIntervalSec=0
 735
 736 [Service]
 737 PrivateNetwork=true
 738 # note the nsswitch bind is actually not needed for bk, but
 739 # its the same file so it does no harm.
 740 BindPaths=$bindpaths
 741
 742 Restart=always
 743 RestartSec=20
 744 EOF
 745     done
 746     ;;
 747   *)
 748     for unit in exim4 spamassassin dovecot unbound; do
 749       f=/etc/systemd/system/$unit.service.d/nn.conf
 750       if [[ -s $f ]]; then
 751         rm -fv $f
 752         reload=true
 753       fi
 754     done
 755     ;;
 756 esac
 757
 758 # * spamassassin config
 759 i /etc/sysctl.d/80-iank-mail.conf <<'EOF'
 760 # see exim spec
 761 net.netfilter.nf_conntrack_tcp_timeout_close_wait = 120
 762 EOF
 763 if $ir; then
 764   m sysctl -p
 765 fi
 766
 767 i /etc/spamassassin/mylocal.cf <<'EOF'
 768 # this is mylocal.cf because the normal local.cf has a bunch of upstream stuff i dont want to mess with
 769
 770 # /usr/share/doc/exim4-base/README.Debian.gz:
 771 #   SpamAssassin's default report should not be used in a add_header
 772 #   statement since it contains empty lines. (This triggers e.g. Amavis'
 773 #   warning "BAD HEADER SECTION, Improper folded header field made up
 774 #   entirely of whitespace".) This is a safe, terse alternative:
 775 clear_report_template
 776 report (_SCORE_ / _REQD_ requ) _TESTSSCORES(,)_ autolearn=_AUTOLEARN
 777 uridnsbl_skip_domain iankelling.org
 778 uridnsbl_skip_domain amnimal.ninja
 779 uridnsbl_skip_domain expertpathologyreview.com
 780 uridnsbl_skip_domain zroe.org
 781 EOF
 782
 783 # 2020-10-19 remove old file. remove this when all hosts updated
 784 rm -fv /etc/systemd/system/spamddnsfix.{timer,service}
 785
 786 i /etc/default/spamassassin <<'EOF'
 787 # defaults plus debugging flags for an issue im having
 788 OPTIONS="--create-prefs --max-children 5 --helper-home-dir"
 789 PIDFILE="/var/run/spamd.pid"
 790 # my additions
 791 NICE="--nicelevel 15"
 792 CRON=1
 793 EOF
 794 #####   end spamassassin config
 795
 796
 797 # * Update mail cert
 798 if [[ -e /p/c/filesystem ]]; then
 799   # note, man openvpn implies we could just call mail-route on vpn startup/shutdown with
 800   # systemd, buuut it can remake the tun device unexpectedly, i got this in the log
 801   # after my internet was down for a bit:
 802   # NOTE: Pulled options changed on restart, will need to close and reopen TUN/TAP device.
 803   m /a/exe/vpn-mk-client-cert -b mailclient -n mail li.iankelling.org
 804 fi
 805
 806 # With openvpn, I didn't get around to persisting the openvpn
 807 # cert/configs into /p/c/machine_specific/bk, so I had this case to
 808 # manually get the cert. However, we aren't using openvpn anymore, so it
 809 # is commented out.
 810 #
 811 # case $HOSTNAME in
 812 #   bk)
 813 #     if [[ ! -e /etc/openvpn/client/mail.conf ]]; then
 814 #       echo "$0: error: first, on a system with /p/c/filesystem, run mail-setup, or the vpn-mk-client-cert line above this err" 2>&2
 815 #       exit 1
 816 #     fi
 817 #     ;;
 818 # esac
 819
 820 m rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/mail-cert-cron /usr/local/bin
 821
 822 i /etc/systemd/system/mailcert.service <<'EOF'
 823 [Unit]
 824 Description=Mail cert rsync
 825 After=multi-user.target
 826
 827 [Service]
 828 Type=oneshot
 829 ExecStart=/usr/local/bin/sysd-mail-once mailcert /usr/local/bin/mail-cert-cron
 830 EOF
 831 i /etc/systemd/system/mailcert.timer <<'EOF'
 832 [Unit]
 833 Description=Run mail-cert once a day
 834
 835 [Timer]
 836 OnCalendar=daily
 837
 838 [Install]
 839 WantedBy=timers.target
 840 EOF
 841
 842
 843 wghost=${HOSTNAME}wg.b8.nz
 844 if $bhost_t && [[ ! -e /etc/exim4/certs/$wghost/privkey.pem ]]; then
 845   certbot -n --manual-public-ip-logging-ok --eff-email --agree-tos -m letsencrypt@iankelling.org \
 846           certonly --manual --preferred-challenges=dns \
 847           --manual-auth-hook /a/bin/ds/le-dns-challenge \
 848           --manual-cleanup-hook /a/bin/ds/le-dns-challenge-cleanup \
 849           --deploy-hook /a/bin/ds/le-exim-deploy -d $wghost
 850 fi
 851
 852 # * fail2ban
 853
 854 # todo: test that these configs actually work, eg run
 855 # s iptables-exim -S
 856 # and see someone is banned.
 857
 858 sed 's/^ *before *= *iptables-common.conf/before = iptables-common-exim.conf/' \
 859     /etc/fail2ban/action.d/iptables-multiport.conf| i /etc/fail2ban/action.d/iptables-exim.conf
 860 i /etc/fail2ban/action.d/iptables-common-exim.conf <<'EOF'
 861 # iank: same as iptables-common, except iptables is iptables-exim, ip6tables is ip6tables-exim
 862
 863 # Fail2Ban configuration file
 864 #
 865 # Author: Daniel Black
 866 #
 867 # This is a included configuration file and includes the definitions for the iptables
 868 # used in all iptables based actions by default.
 869 #
 870 # The user can override the defaults in iptables-common.local
 871 #
 872 # Modified: Alexander Koeppe <format_c@online.de>, Serg G. Brester <serg.brester@sebres.de>
 873 #       made config file IPv6 capable (see new section Init?family=inet6)
 874
 875 [INCLUDES]
 876
 877 after = iptables-blocktype.local
 878         iptables-common.local
 879 # iptables-blocktype.local is obsolete
 880
 881 [Definition]
 882
 883 # Option:  actionflush
 884 # Notes.:  command executed once to flush IPS, by shutdown (resp. by stop of the jail or this action)
 885 # Values:  CMD
 886 #
 887 actionflush = <iptables> -F f2b-<name>
 888
 889
 890 [Init]
 891
 892 # Option:  chain
 893 # Notes    specifies the iptables chain to which the Fail2Ban rules should be
 894 #          added
 895 # Values:  STRING  Default: INPUT
 896 chain = INPUT
 897
 898 # Default name of the chain
 899 #
 900 name = default
 901
 902 # Option:  port
 903 # Notes.:  specifies port to monitor
 904 # Values:  [ NUM | STRING ]  Default:
 905 #
 906 port = ssh
 907
 908 # Option:  protocol
 909 # Notes.:  internally used by config reader for interpolations.
 910 # Values:  [ tcp | udp | icmp | all ] Default: tcp
 911 #
 912 protocol = tcp
 913
 914 # Option:  blocktype
 915 # Note:    This is what the action does with rules. This can be any jump target
 916 #          as per the iptables man page (section 8). Common values are DROP
 917 #          REJECT, REJECT --reject-with icmp-port-unreachable
 918 # Values:  STRING
 919 blocktype = REJECT --reject-with icmp-port-unreachable
 920
 921 # Option:  returntype
 922 # Note:    This is the default rule on "actionstart". This should be RETURN
 923 #          in all (blocking) actions, except REJECT in allowing actions.
 924 # Values:  STRING
 925 returntype = RETURN
 926
 927 # Option:  lockingopt
 928 # Notes.:  Option was introduced to iptables to prevent multiple instances from
 929 #          running concurrently and causing irratic behavior.  -w was introduced
 930 #          in iptables 1.4.20, so might be absent on older systems
 931 #          See https://github.com/fail2ban/fail2ban/issues/1122
 932 # Values:  STRING
 933 lockingopt = -w
 934
 935 # Option:  iptables
 936 # Notes.:  Actual command to be executed, including common to all calls options
 937 # Values:  STRING
 938 iptables = /usr/local/bin/iptables-exim <lockingopt>
 939
 940
 941 [Init?family=inet6]
 942
 943 # Option:  blocktype (ipv6)
 944 # Note:    This is what the action does with rules. This can be any jump target
 945 #          as per the iptables man page (section 8). Common values are DROP
 946 #          REJECT, REJECT --reject-with icmp6-port-unreachable
 947 # Values:  STRING
 948 blocktype = REJECT --reject-with icmp6-port-unreachable
 949
 950 # Option:  iptables (ipv6)
 951 # Notes.:  Actual command to be executed, including common to all calls options
 952 # Values:  STRING
 953 iptables = /usr/local/bin/ip6tables-exim <lockingopt>
 954 EOF
 955
 956 i /etc/fail2ban/jail.d/exim.local <<'EOF'
 957 [exim]
 958 enabled  = true
 959 port     = 25,587
 960 filter   = exim
 961 banaction = iptables-exim
 962
 963 # 209.51.188.13 = mail.fsf.org
 964 # 2001:470:142::13 = mail.fsf.org
 965 # 209.51.188.92 = eggs.gnu.org
 966 # 2001:470:142:3::10 = eggs.gnu.org
 967 # 72.14.176.105 2600:3c00:e000:280::2 = mail.iankelling.org
 968 # 10.173.8.1 = non-nn net
 969 ignoreip = 209.51.188.13 2001:470:142::13 209.51.188.92 2001:470:142:3::10 72.14.176.105 2600:3c00:e000:280::2 10.173.8.1
 970 EOF
 971 if $ir; then
 972   m systemctl restart fail2ban
 973 fi
 974
 975 # * common exim4 config
 976
 977
 978 ## old, not using forward files anymore
 979 rm -fv $uhome/.forward /root/.forward
 980
 981
 982 # Make all system users be aliases. preventative
 983 # prevents things like cron mail for user without alias
 984 awk 'BEGIN { FS = ":" } ; $6 !~ /^\/home/ || $7 ~ /\/nologin$/  { print $1 }' /etc/passwd| while read -r user; do
 985   if [[ ! $user ]]; then
 986     continue
 987   fi
 988   if ! grep -q "^$user:" /etc/aliases; then
 989     echo "$user: root" |m tee -a /etc/aliases
 990   fi
 991 done
 992
 993
 994 awk 'BEGIN { FS = ":" } ; $6 ~ /^\/home/ && $7 !~ /\/nologin$/ { print $1 }' /etc/passwd| while read -r user; do
 995   case $HOSTNAME in
 996     $MAIL_HOST)
 997       sed -i "/^user:/d" /etc/aliases
 998       ;;
 999     *)
1000       if ! grep -q "^$user:" /etc/aliases; then
1001         echo "$user: root" |m tee -a /etc/aliases
1002       fi
1003       ;;
1004   esac
1005 done
1006
1007 if ! grep -q "^ncsoft:" /etc/aliases; then
1008   echo "ncsoft: graceq2323@gmail.com" |m tee -a /etc/aliases
1009 fi
1010
1011
1012
1013 m gpasswd -a iank adm #needed for reading logs
1014
1015 ### make local bounces go to normal maildir
1016 # local mail that bounces goes to /Maildir or /root/Maildir
1017 dirs=(/m/md/bounces/{cur,tmp,new})
1018 m mkdir -p ${dirs[@]}
1019 m chown iank:iank /m /m/md
1020 m ln -sfT /m/md /m/iank
1021 m chmod 771 /m /m/md
1022 m chown -R $u:Debian-exim /m/md/bounces
1023 m chmod 775 ${dirs[@]}
1024 m usermod -a -G Debian-exim $u
1025 for d in /Maildir /root/Maildir; do
1026   if [[ ! -L $d ]]; then
1027     m rm -rf $d
1028   fi
1029   m ln -sf -T /m/md/bounces $d
1030 done
1031
1032 # dkim, client passwd file
1033 files=(/p/c/machine_specific/$HOSTNAME/filesystem/etc/exim4/*)
1034 f=/p/c/filesystem/etc/exim4/passwd.client
1035 if [[ -e $f ]]; then
1036   files+=($f)
1037 fi
1038 if (( ${#files[@]} )); then
1039   m rsync -ahhi --chown=root:Debian-exim --chmod=0640 \
1040     ${files[@]} /etc/exim4
1041 fi
1042
1043 # By default, only 10 days of logs are kept. increase that.
1044 # And dont compress, I look back at logs too often and
1045 # dont need the annoyance of decompressing them all the time.
1046 m sed -ri '/^\s*compress\s*$/d;s/^(\s*rotate\s).*/\11000/' /etc/logrotate.d/exim4-base
1047 files=(/var/log/exim4/*.gz)
1048 if (( ${#files[@]} )); then
1049   gunzip ${files[@]}
1050 fi
1051
1052 ## disabled. not using .forward files, but this is still interesting
1053 ## for reference.
1054 # ## https://blog.dhampir.no/content/make-exim4-on-debian-respect-forward-and-etcaliases-when-using-a-smarthost
1055 # # i only need .forwards, so just doing that one.
1056 # cd /etc/exim4/conf.d/router
1057 # b=userforward_higher_priority
1058 # # replace the router name so it is unique
1059 # sed -r s/^\\S+:/$b:/ 600_exim4-config_userforward >175_$b
1060 rm -fv /etc/exim4/conf.d/router/175_userforward_higher_priority
1061
1062 # todo, consider 'separate' in etc/exim4.conf, could it help on busy systems?
1063
1064 # alerts is basically the postmaster address
1065 m sed -i --follow-symlinks -f - /etc/aliases <<EOF
1066 \$a root: alerts@iankelling.org
1067 /^root:/d
1068 EOF
1069
1070 cat >/etc/exim4/conf.d/rewrite/34_iank_rewriting <<'EOF'
1071 ncsoft@zroe.org graceq2323@gmail.com hE
1072 EOF
1073
1074 # old name
1075 rm -fv /etc/exim4/conf.d/retry/37_retry
1076
1077 cat >/etc/exim4/conf.d/retry/17_retry <<'EOF'
1078 # Retry fast for my own domains
1079 iankelling.org * F,1d,4m;F,14d,1h
1080 amnimal.ninja * F,1d,4m;F,14d,1h
1081 expertpathologyreview.com * F,1d,4m;F,14d,1h
1082 je.b8.nz * F,1d,4m;F,14d,1h
1083 zroe.org * F,1d,4m;F,14d,1h
1084 eximbackup.b8.nz * F,1d,4m;F,14d,1h
1085
1086 # The spec says the target domain will be used for temporary host errors,
1087 # but i've found that isn't correct, the hostname is required
1088 # at least sometimes.
1089 nn.b8.nz * F,1d,4m;F,14d,1h
1090 defaultnn.b8.nz * F,1d,4m;F,14d,1h
1091 mx.iankelling.org * F,1d,4m;F,14d,1h
1092 bk.b8.nz * F,1d,4m;F,14d,1h
1093 eggs.gnu.org * F,1d,4m;F,14d,1h
1094 fencepost.gnu.org * F,1d,4m;F,14d,1h
1095
1096 # afaik our retry doesnt need this, but just using everything
1097 mx.amnimal.ninja * F,1d,4m;F,14d,1h
1098 mx.expertpathologyreview.com * F,1d,4m;F,14d,1h
1099
1100
1101 mail.fsf.org * F,1d,15m;F,14d,1h
1102 EOF
1103
1104
1105 rm -vf /etc/exim4/conf.d/main/000_localmacros # old filename
1106
1107 # separate file so without quoted EOF for convenience
1108 cat >/etc/exim4/conf.d/main/000_local2 <<EOF
1109 # normally empty, I set this so I can set the envelope address
1110 # when doing mail redelivery to invoke filters. Also allows
1111 # me exiqgrep and stuff.
1112 MAIN_TRUSTED_GROUPS = $u
1113 EOF
1114
1115 cat >/etc/exim4/conf.d/main/000_local <<'EOF'
1116 MAIN_TLS_ENABLE = true
1117
1118 # require tls connections for all smarthosts
1119 REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS = *
1120
1121 # debian exim config added this in 2016 or so?
1122 # it's part of the smtp spec, to limit lines to 998 chars
1123 # but a fair amount of legit mail does not adhere to it. I don't think
1124 # this should be default, like it says in
1125 # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=828801
1126 # todo: the bug for introducing this was about headers, but
1127 # the fix maybe is for all lines? one says gmail rejects, the
1128 # other says gmail does not reject. figure out and open a new bug.
1129 IGNORE_SMTP_LINE_LENGTH_LIMIT = true
1130
1131 # more verbose logs
1132 MAIN_LOG_SELECTOR = +all
1133
1134 # Based on spec, seems like a good idea to be nice.
1135 smtp_return_error_details = true
1136
1137 # default is 10. when exim has been down for a bit, fsf mailserver
1138 # will do a big send in one connection, then exim decides to put
1139 # the messages in the queue instead of delivering them, to avoid
1140 # spawning too many delivery processes. This is the same as the
1141 # fsfs value. And the corresponding one for how many messages
1142 # to send out in 1 connection remote_max_parallel = 256
1143 smtp_accept_queue_per_connection = 500
1144
1145
1146 DKIM_CANON = relaxed
1147 DKIM_SELECTOR = li
1148
1149 # from comments in
1150 # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
1151 # and its best for this to align https://tools.ietf.org/html/rfc7489#page-8
1152 # There could be some circumstance when the
1153 # from: isnt our domain, but the envelope sender is
1154 # and so still want to sign, but I cant think of any case.
1155 DKIM_DOMAIN = ${lc:${domain:$rh_from:}}
1156 # The file is based on the outgoing domain-name in the from-header.
1157 # sign if key exists
1158 DKIM_PRIVATE_KEY = ${if exists{/etc/exim4/${dkim_domain}-private.pem} {/etc/exim4/${dkim_domain}-private.pem}}
1159
1160 # most of the ones that gmail seems to use.
1161 # Exim has horrible default of signing unincluded
1162 # list- headers since they got mentioned in an
1163 # rfc, but this messes up mailing lists, like gnu/debian which want to
1164 # keep your dkim signature intact but add list- headers.
1165 DKIM_SIGN_HEADERS = mime-version:in-reply-to:references:from:date:subject:to
1166
1167 domainlist local_hostnames = ! je.b8.nz : ! bk.b8.nz : *.b8.nz : b8.nz
1168
1169 hostlist iank_trusted = <; \
1170 # veth0
1171 10.173.8.1 ; \
1172 # li li_ip6
1173 72.14.176.105 ; 2600:3c00::f03c:91ff:fe6d:baf8 ; \
1174 # li_vpn_net li_vpn_net_ip6s
1175 10.8.0.0/24; 2600:3c00:e000:280::/64 ; 2600:3c00:e002:3800::/56 ;  \
1176 # bk bk_ip6
1177 85.119.83.50 ; 2001:ba8:1f1:f0c9::2 ; \
1178 # je je_ipv6
1179 85.119.82.128 ; 2001:ba8:1f1:f09d::2 ; \
1180 # fsf_mit_net fsf_mit_net_ip6 fsf_net fsf_net_ip6 fsf_office_net
1181 18.4.89.0/24 ; 2603:3005:71a:2e00::/64 ; 209.51.188.0/24 ; 2001:470:142::/48 ; 74.94.156.208/28
1182
1183
1184 # this is the default delay_warning_condition, plus matching on local_domains.
1185 # If I have some problem with my local system that causes delayed delivery,
1186 # I dont want to send warnings out to non-local domains.
1187 delay_warning_condition = ${if or {\
1188   { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} }\
1189   { match{$h_precedence:}{(?i)bulk|list|junk} }\
1190   { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} }\
1191   { match_domain{$domain}{+local_domains} }\
1192   } {no}{yes}}
1193 EOF
1194
1195 rm -fv /etc/exim4/rcpt_local_acl # old path
1196
1197 i /etc/exim4/conf.d/local_deny_exceptions_acl <<'EOF'
1198 # This acl already exists in rcpt, this just makes it more widespread.
1199 # See the comment there for its rationale. The reason it needs to be
1200 # more widespread is that I've turned on sender verification, but cron
1201 # emails can fail sender verification since I may be in a network that
1202 # doesn't have my local dns.
1203 accept
1204   authenticated = *
1205
1206 # i setup a local programs smtp to mail.iankelling.org, this
1207 # skips sender verification for it.
1208 accept
1209   hosts = 10.173.8.1
1210 EOF
1211
1212 rm -fv /etc/exim4/data_local_acl # old path
1213
1214 i /etc/exim4/conf.d/data_local_acl <<'EOF'
1215 # Except for the "condition =", this was
1216 # a comment in the check_data acl. The comment about this not
1217 # being suitable has been changed in newer exim versions. The only thing
1218 # related I found was to
1219 # add the condition =, cuz spamassassin has problems with big
1220 # messages and spammers don't bother with big messages,
1221 # but I've increased the size from 10k
1222 # suggested in official docs, and 100k in the wiki example because
1223 # those docs are rather old and I see a 110k spam message
1224 # pretty quickly looking through my spam folder.
1225
1226 warn
1227   !hosts = +iank_trusted
1228   remove_header = X-Spam_score: X-Spam_score_int : X-Spam_bar : X-Spam_report
1229
1230 warn
1231   !hosts = +iank_trusted
1232   # Smarthosts connect with residential ips and thus get flagged as spam if we do a spam check.
1233   !authenticated = plain_server:login_server
1234   condition = ${if < {$message_size}{5000K}}
1235   spam = Debian-exim:true
1236   add_header = X-Spam_score_int: $spam_score_int
1237   add_header = X-Spam_score: $spam_score
1238   add_header = X-Spam_bar: $spam_bar
1239   add_header = X-Spam_report: $spam_report
1240   add_header = X-Spam_action: $spam_action
1241
1242 warn
1243   !hosts = +iank_trusted
1244   !authenticated = plain_server:login_server
1245   condition = ${if def:malware_name}
1246   remove_header = Subject:
1247   add_header = Subject: [Clamav warning: $malware_name] $h_subject
1248   log_message = heuristic malware warning: $malware_name
1249
1250 #accept
1251 #  spf = pass:fail:softfail:none:neutral:permerror:temperror
1252 #  dmarc_status = reject:quarantine
1253 #  add_header = Reply-to: dmarctest@iankelling.org
1254
1255 EOF
1256
1257 i /etc/exim4/conf.d/router/900_exim4-config_local_user <<'EOF'
1258 ### router/900_exim4-config_local_user
1259 #################################
1260
1261 # This router matches local user mailboxes. If the router fails, the error
1262 # message is "Unknown user".
1263 local_user:
1264   debug_print = "R: local_user for $local_part@$domain"
1265   driver = accept
1266   domains = +local_domains
1267 # ian: default file except where mentioned.
1268 # ian: commented this. I get all local parts. for bk, an rcpt
1269 # check handles checking with dovecot, and the only router
1270 # after this is root.
1271 #  local_parts = ! root
1272   transport = LOCAL_DELIVERY
1273   cannot_route_message = Unknown user
1274 # ian: added for + addressing.
1275   local_part_suffix = +*
1276   local_part_suffix_optional
1277 EOF
1278 i /etc/exim4/conf.d/transport/30_exim4-config_dovecot_lmtp <<'EOF'
1279 dovecot_lmtp:
1280   driver = lmtp
1281   socket = /var/run/dovecot/lmtp
1282   #maximum number of deliveries per batch, default 1
1283   batch_max = 200
1284   envelope_to_add
1285 EOF
1286
1287 i /etc/exim4/conf.d/transport/30_remote_smtp_vpn <<'EOF'
1288 # same as debians 30_exim4-config_remote_smtp, but
1289 # with interface added at the end.
1290
1291 remote_smtp_vpn:
1292   debug_print = "T: remote_smtp_vpn for $local_part@$domain"
1293   driver = smtp
1294 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
1295   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
1296 .endif
1297 .ifdef REMOTE_SMTP_HOSTS_AVOID_TLS
1298   hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
1299 .endif
1300 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1301   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1302 .endif
1303 .ifdef REMOTE_SMTP_RETURN_PATH
1304   return_path = REMOTE_SMTP_RETURN_PATH
1305 .endif
1306 .ifdef REMOTE_SMTP_HELO_DATA
1307   helo_data=REMOTE_SMTP_HELO_DATA
1308 .endif
1309 .ifdef DKIM_DOMAIN
1310 dkim_domain = DKIM_DOMAIN
1311 .endif
1312 .ifdef DKIM_SELECTOR
1313 dkim_selector = DKIM_SELECTOR
1314 .endif
1315 .ifdef DKIM_PRIVATE_KEY
1316 dkim_private_key = DKIM_PRIVATE_KEY
1317 .endif
1318 .ifdef DKIM_CANON
1319 dkim_canon = DKIM_CANON
1320 .endif
1321 .ifdef DKIM_STRICT
1322 dkim_strict = DKIM_STRICT
1323 .endif
1324 .ifdef DKIM_SIGN_HEADERS
1325 dkim_sign_headers = DKIM_SIGN_HEADERS
1326 .endif
1327 .ifdef TLS_DH_MIN_BITS
1328 tls_dh_min_bits = TLS_DH_MIN_BITS
1329 .endif
1330 .ifdef REMOTE_SMTP_TLS_CERTIFICATE
1331 tls_certificate = REMOTE_SMTP_TLS_CERTIFICATE
1332 .endif
1333 .ifdef REMOTE_SMTP_PRIVATEKEY
1334 tls_privatekey = REMOTE_SMTP_PRIVATEKEY
1335 .endif
1336 .ifdef REMOTE_SMTP_HOSTS_REQUIRE_TLS
1337   hosts_require_tls = REMOTE_SMTP_HOSTS_REQUIRE_TLS
1338 .endif
1339 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1340   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1341 .endif
1342   interface = <; 10.8.0.4 ; 2600:3c00:e002:3800::4
1343 EOF
1344
1345 i /etc/exim4/conf.d/transport/30_smarthost_dkim <<'EOF'
1346 # ian: this is remote_smtp_smarthost plus the dkim parts from remote_smtp
1347
1348 smarthost_dkim:
1349   debug_print = "T: remote_smtp_smarthost for $local_part@$domain"
1350   driver = smtp
1351   multi_domain
1352 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
1353   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
1354 .endif
1355   hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \
1356         {\
1357         ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\
1358         }\
1359         {} \
1360       }
1361 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1362   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
1363 .endif
1364 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1365   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
1366 .endif
1367 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1368   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
1369 .endif
1370 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
1371   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
1372 .endif
1373 .ifdef REMOTE_SMTP_HEADERS_REWRITE
1374   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
1375 .endif
1376 .ifdef REMOTE_SMTP_RETURN_PATH
1377   return_path = REMOTE_SMTP_RETURN_PATH
1378 .endif
1379 .ifdef REMOTE_SMTP_HELO_DATA
1380   helo_data=REMOTE_SMTP_HELO_DATA
1381 .endif
1382 .ifdef TLS_DH_MIN_BITS
1383 tls_dh_min_bits = TLS_DH_MIN_BITS
1384 .endif
1385 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1386 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
1387 .endif
1388 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1389 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
1390 .endif
1391 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1392   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
1393 .endif
1394 .ifdef DKIM_DOMAIN
1395 dkim_domain = DKIM_DOMAIN
1396 .endif
1397 .ifdef DKIM_SELECTOR
1398 dkim_selector = DKIM_SELECTOR
1399 .endif
1400 .ifdef DKIM_PRIVATE_KEY
1401 dkim_private_key = DKIM_PRIVATE_KEY
1402 .endif
1403 .ifdef DKIM_CANON
1404 dkim_canon = DKIM_CANON
1405 .endif
1406 .ifdef DKIM_STRICT
1407 dkim_strict = DKIM_STRICT
1408 .endif
1409 .ifdef DKIM_SIGN_HEADERS
1410 dkim_sign_headers = DKIM_SIGN_HEADERS
1411 .endif
1412 EOF
1413
1414
1415 cat >/etc/exim4/update-exim4.conf.conf  <<'EOF'
1416 # default stuff, i havent checked if its needed
1417 dc_minimaldns='false'
1418 dc_relay_nets=''
1419 CFILEMODE='644'
1420 dc_use_split_config='true'
1421 dc_mailname_in_oh='true'
1422 EOF
1423
1424
1425 # * radicale
1426 if mailhost; then
1427   if ! mountpoint /o; then
1428     echo "error /o is not a mountpoint" >&2
1429     exit 1
1430   fi
1431
1432   # davx/davdroid setup instructions at the bottom
1433
1434   # main docs:
1435   # http://radicale.org/user_documentation/
1436   # https://davdroid.bitfire.at/configuration/
1437
1438   # note on debugging: if radicale can't bind to the address,
1439   # in the log it just says "Starting Radicale". If you run
1440   # it in the foreground, it will give more info. Background
1441   # plus debug does not help.
1442   # sudo -u radicale radicale -D -f
1443
1444   # created password file with:
1445   # htpasswd -c /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1446   # chmod 640 /p/c/machine_specific/li/filesystem/etc/caldav-htpasswd
1447   # # setup chgrp www-data in ./conflink
1448
1449   pi-nostart radicale
1450
1451   i /etc/systemd/system/radicale.service.d/override.conf <<EOF
1452 [Unit]
1453
1454 After=network.target network-online.target mailnn.service $vpnser
1455
1456 Wants=$vpnser
1457 JoinsNamespaceOf=mailnn.service
1458 StartLimitIntervalSec=0
1459
1460 [Service]
1461 PrivateNetwork=true
1462 BindPaths=$bindpaths
1463 Restart=always
1464 # time to sleep before restarting a service
1465 RestartSec=20
1466
1467 [Install]
1468 # for openvpn
1469 RequiredBy=$vpnser
1470 EOF
1471
1472
1473   # use persistent uid/gid
1474   IFS=:; read -r _ _ uid _ < <(getent passwd radicale ); unset IFS
1475   IFS=:; read -r _ _ gid _ < <(getent group radicale ); unset IFS
1476   if [[ $uid != 609 ]]; then
1477     m systemctl stop radicale ||:
1478     m usermod -u 609 radicale
1479     m groupmod -g 609 radicale
1480     m usermod -g 609 radicale
1481   fi
1482   m find /o/radicale  -xdev -exec chown -h 609 {} +
1483   m find /o/radicale -xdev -exec chgrp -h 609 {} +
1484
1485
1486   # I moved /var/lib/radicale after it's initialization.
1487   # I did a sudo -u radicale git init in the collections subfolder
1488   # after it gets created, per the git docs.
1489   m /a/exe/lnf -T /o/radicale /var/lib/radicale
1490
1491   # from https://www.williamjbowman.com/blog/2015/07/24/setting-up-webdav-caldav-and-carddav-servers/
1492
1493   # more config is for li in distro-end
1494
1495   # coment in this file says this is needed for it to run on startup
1496   sed -ri 's/^\s*#+\s*(ENABLE_RADICALE\s*=\s*yes\s*)/\1/' /etc/default/radicale
1497
1498   # comments say default is 0.0.0.0:5232
1499   m setini hosts 10.8.0.4:5232 server
1500   # https://radicale.org/2.1.html
1501   m setini type http_x_remote_user auth
1502
1503
1504   # disable power management feature, set to 240 min sync interval,
1505   # so it shouldn't be bad.
1506
1507   # davdroid from f-druid.
1508   # login with url and user name
1509   # url https://cal.iankelling.org/ian
1510   # username ian
1511   # pass, see password manager for radicale
1512   #
1513   # add account dialog:
1514   #
1515   # set account name as ian@iankelling.org, per help text below the
1516   # field.
1517   #
1518   # switch to groups are per-contact categories,
1519   # per https://davdroid.bitfire.at/configuration/radicale/
1520   #
1521   #
1522   # After setting up account, I added one address book, named
1523   # ianaddr. calender was already created, named ian. checked boxes under
1524   # both. synced.
1525   #
1526   # To restore from old phone to new phone, I wiped all data out, then copied over the newly created files. I think
1527   #
1528   # ignorable background info:
1529   #
1530   # opentasks uses the calendar file.
1531   #
1532   # The address book I created got a uuid as a name for the file. Note
1533   # the .props file says if it's a calendar or addressbook.
1534   #
1535   # When debugging, tailed /var/log/radicale/radicale.log and apache log,
1536   # both show the requests happening. Without creating the address book,
1537   # after creating a contact, a sync would delete it.
1538   #
1539   # Address books correspond to .props files in the radicale dir.
1540   #
1541   #  Some background is here,
1542   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1543   # which shows separate vcard option is from rfc 6350, the other is 2426,
1544   # radicale page says it implements the former not the latter,
1545   # which conflicts with the documentation of which to select, but whatever.
1546   # http://radicale.org/technical_choices/
1547   # https://davdroid.bitfire.at/faq/entry/cant-manage-groups-on-device/
1548   #
1549   # Note, url above says only cayanogenmod 13+ and omnirom can manage groups.
1550
1551   # Note, radicale had built-in git support to track changes, but they
1552   # removed it in 2.0.
1553
1554 fi
1555
1556 # * dovecot
1557
1558 # ** $MAIL_HOST|bk|je)
1559 case $HOSTNAME in
1560   $MAIL_HOST|bk|je)
1561     # based on a little google and package search, just the dovecot
1562     # packages we need instead of dovecot-common.
1563     #
1564     # dovecot-lmtpd is for exim to deliver to dovecot instead of maildir
1565     # directly.  The reason to do this is to use dovecot\'s sieve, which
1566     # can generally do more than exims filters (a few things less) and
1567     # sieve has the benefit of being supported in postfix and
1568     # proprietary/weird environments, so there is more examples on the
1569     # internet.
1570     pi-nostart dovecot-core dovecot-imapd dovecot-sieve dovecot-lmtpd dovecot-sqlite sqlite3
1571
1572     for f in /p/c{/machine_specific/$HOSTNAME,}/filesystem/etc/dovecot/users; do
1573       if [[ -e $f ]]; then
1574         m rsync -ahhi --chown=root:dovecot --chmod=0640 $f /etc/dovecot/
1575         break
1576       fi
1577     done
1578     for f in /p/c/subdir_files/sieve/*sieve /a/bin/ds/subdir_files/sieve/*sieve; do
1579       m sudo -u $u /a/exe/lnf -v -T $f $uhome/sieve/${f##*/}
1580     done
1581
1582     # https://wiki.dovecot.org/SSL/DovecotConfiguration
1583     i /etc/dovecot/dhparam <<'EOF'
1584 -----BEGIN DH PARAMETERS-----
1585 MIIBCAKCAQEAoleil6SBxGqQKk7j0y2vV3Oklv6XupZKn7PkPv485QuFeFagifeS
1586 A+Jz6Wquqk5zhGyCu63Hp4wzGs4TyQqoLjkaWL6Ra/Bw3g3ofPEzMGEsV1Qdqde4
1587 jorwiwtr2i9E6TXQp0noT/7VFeHulIkayTeW8JulINdMHs+oLylv16McGCIrxbkM
1588 8D1PuO0TP/CNDs2QbRvJ1RjY3CeGpxMhrSHVgBCUMwnA2cvz3bYjI7UMYMMDPNrE
1589 PLrwsYzXGGCdJsO2vsmmqqgLsZiapYJlUNjfiyWLt7E2H6WzkNB3VIhIPfLqFDPK
1590 xioE3sYKdjOt+p6mlg3l8+OLtODEFPHDqwIBAg==
1591 -----END DH PARAMETERS-----
1592 EOF
1593     {
1594
1595       if [[ $HOSTNAME == "$MAIL_HOST" ]]; then
1596         cat <<'EOF'
1597 ssl_cert = </etc/exim4/fullchain.pem
1598 ssl_key = </etc/exim4/privkey.pem
1599 EOF
1600       else
1601         # We have a lets encrypt hooks that puts things here.
1602         # This is just for bk, which uses the vpn cert in exim
1603         # for sending mail, but the local hostname cert for
1604         # dovecot.
1605         cat <<'EOF'
1606 ssl_cert = </etc/exim4/exim.crt
1607 ssl_key = </etc/exim4/exim.key
1608 EOF
1609       fi
1610
1611       cat <<'EOF'
1612 # https://ssl-config.mozilla.org
1613 ssl = required
1614 # this is the same as the certbot list, in my cert cronjob, I check if that has changed upstream.
1615 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
1616 ssl_protocols = TLSv1.2
1617 ssl_prefer_server_ciphers = no
1618
1619 protocol lmtp {
1620 #per https://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
1621 # default is just $mail_plugins
1622   mail_plugins = $mail_plugins sieve
1623 }
1624 EOF
1625       if dpkg --compare-versions $(dpkg-query -f='${Version}\n' --show dovecot-core) ge 1:2.3; then
1626         cat <<EOF
1627 ssl_dh = </etc/dovecot/dhparam
1628 EOF
1629       fi
1630     } >/etc/dovecot/local.conf
1631
1632     ;;&
1633
1634   # **  $MAIL_HOST)
1635   $MAIL_HOST)
1636     # If we changed 90-sieve.conf and removed the active part of the
1637     # sieve option, we wouldn\'t need this, but I\'d rather not modify a
1638     # default config if not needed. This won\'t work as a symlink in /a/c
1639     # unfortunately.
1640     m sudo -u $u /a/exe/lnf -T sieve/main.sieve $uhome/.dovecot.sieve
1641
1642     if [[ ! -e $uhome/sieve/personal.sieve ]]; then
1643       m touch $uhome/sieve/personal{,end}{,test}.sieve
1644     fi
1645
1646     rm -fv /etc/dovecot/conf.d/20-lmtp.conf # file from prev version
1647     cat >>/etc/dovecot/local.conf <<EOF
1648 # simple password file based login
1649 !include conf.d/auth-passwdfile.conf.ext
1650
1651 # ian: %u is used for alerts user vs iank
1652 mail_location = maildir:/m/%u:LAYOUT=fs:INBOX=/m/%u/INBOX
1653 mail_uid = $u
1654 mail_gid = $u
1655
1656 protocol lmtp {
1657 # For a normal setup with exim, we need something like this, which
1658 # removes the domain part
1659 #  auth_username_format = %Ln
1660 #
1661 #  or else # Exim says something like
1662 #  "LMTP error after RCPT ... 550 ... User doesn't exist someuser@somedomain"
1663 # Dovecot verbose log says something like
1664 # "auth-worker(9048): passwd(someuser@somedomain): unknown user"
1665 # reference: http://wiki.dovecot.org/LMTP/Exim
1666 #
1667 # However, I use this to direct all mail to the same inbox.
1668 # A normal way to do this, which I did at first is to have
1669 # a router in exim almost at the end, eg 950,
1670 #local_catchall:
1671 #  debug_print = "R: catchall for \$local_part@\$domain"
1672 #  driver = redirect
1673 #  domains = +local_domains
1674 #  data = $u
1675 # based on
1676 # http://blog.alteholz.eu/2015/04/exim4-and-catchall-email-address/
1677 # with superflous options removed.
1678 # However, this causes the envelope to be rewritten,
1679 # which makes filtering into mailboxes a little less robust or more complicated,
1680 # so I've done it this way instead. it also requires
1681 # modifying the local router in exim.
1682   auth_username_format = $u
1683 }
1684 EOF
1685     ;;&
1686   # **  bk|je)
1687   bk|je)
1688     chown -R mail.mail /m/md
1689
1690     f=/etc/dovecot/conf.d/10-auth.conf
1691     if [[ -e $f ]]; then
1692       mv $f $f-iank-disabled
1693     fi
1694
1695     cat >>/etc/dovecot/local.conf <<EOF
1696 !include /etc/dovecot/local.conf.ext
1697
1698 # for debugging info, uncomment these.
1699 # logs go to syslog and to /var/log/mail.log
1700 #auth_verbose=yes
1701 #mail_debug=yes
1702
1703
1704 protocol lmtp {
1705 # This downcases the localpart. default is case sensitive.
1706 # case sensitive local part will miss out on valid email when some person or system
1707 # mistakenly capitalizes things.
1708   auth_username_format = %Lu
1709 }
1710
1711 # make 147 only listen on localhost, plan to use for nextcloud.
1712 # copied from mailinabox
1713 service imap-login {
1714   inet_listener imap {
1715     address = 127.0.0.1
1716   }
1717 }
1718 # https://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_dovecot_authenticator.html
1719 service auth {
1720   unix_listener auth-client {
1721     user = Debian-exim
1722     group = Debian-exim
1723   }
1724 }
1725
1726
1727 plugin {
1728   sieve_before = /etc/dovecot/sieve-spam.sieve
1729   # from mailinabox
1730   sieve = /m/sieve/%d/%n.sieve
1731   sieve_dir = /m/sieve/%d/%n
1732 }
1733
1734
1735 # all taken from mailinabox.
1736 mail_location = maildir:/m/md/%d/%n
1737 # meh, ok.
1738 mail_privileged_group = mail
1739 # By default Dovecot allows users to log in only with UID numbers 500 and above. mail is 8
1740 first_valid_uid = 1
1741
1742 # todo: test these changes in the universal config
1743 # mailboxes taken from mailinabox but removed
1744 # settings duplicate to defaults
1745 namespace inbox {
1746   mailbox INBOX {
1747     auto = subscribe
1748   }
1749   mailbox Spam {
1750     special_use = \Junk
1751     auto = subscribe
1752   }
1753   mailbox Drafts {
1754     auto = subscribe
1755   }
1756   mailbox Sent {
1757     auto = subscribe
1758   }
1759   mailbox Trash {
1760     auto = subscribe
1761   }
1762   mailbox Archive {
1763     special_use = \Archive
1764     auto = subscribe
1765   }
1766 }
1767 auth_mechanisms = plain login
1768 EOF
1769
1770     i /etc/dovecot/sieve-spam.sieve <<'EOF'
1771 require ["regex", "fileinto", "imap4flags"];
1772
1773 if allof (header :regex "X-Spam-Status" "^Yes") {
1774   fileinto "Spam";
1775   stop;
1776 }
1777 EOF
1778
1779     i /etc/dovecot/local.conf.ext <<'EOF'
1780 passdb {
1781   driver = sql
1782   args = /etc/dovecot/dovecot-sql.conf.ext
1783 }
1784 userdb {
1785   driver = sql
1786   args = /etc/dovecot/dovecot-sql.conf.ext
1787 }
1788
1789 EOF
1790
1791     i /etc/dovecot/dovecot-sql.conf.ext <<'EOF'
1792 # from mailinabox
1793 driver = sqlite
1794 # for je and bk, populated the testignore users for the relevant domains
1795 connect = /m/rc/users.sqlite
1796 default_pass_scheme = SHA512-CRYPT
1797 password_query = SELECT email as user, password FROM users WHERE email='%u';
1798 user_query = SELECT email AS user, "mail" as uid, "mail" as gid, "/m/md/%d/%n" as home FROM users WHERE email='%u';
1799 iterate_query = SELECT email AS user FROM users;
1800 EOF
1801     m chmod 0600 /etc/dovecot/dovecot-sql.conf.ext # per Dovecot instructions
1802
1803     # db needs to be in a www-data writable directory
1804     db=/m/rc/users.sqlite
1805     if [[ ! -s $db ]]; then
1806       m mkdir -p /m/rc
1807       m sqlite3 $db <<'EOF'
1808 CREATE TABLE users (
1809 id INTEGER PRIMARY KEY AUTOINCREMENT,
1810 email TEXT NOT NULL UNIQUE,
1811 password TEXT NOT NULL,
1812 extra,
1813 privileges TEXT NOT NULL DEFAULT '');
1814 EOF
1815     fi
1816     # users.sqlite is saved into /p/c/machine_specific, so update it there!.
1817     #
1818     # example of adding a user:
1819     # hash: doveadm pw -s SHA512-CRYPT -p passhere
1820     # sqlite3 /m/rc/users.sqlite <<'EOF'
1821     #insert into users (email, password) values ('testignore@bk.b8.nz', 'hash');
1822     #EOF
1823     # update users set password = 'hash' where email = 'testignore@bk.b8.nz';
1824
1825     # this should be at the end since it requires a valid dovecot config
1826     m sievec /etc/dovecot/sieve-spam.sieve
1827     ;;&
1828   # **  bk)
1829   bk)
1830     # roundcube uses this
1831     mkdir -p /m/sieve
1832     chown mail.mail /m/sieve
1833     m pi dovecot-managesieved
1834     ;;
1835 esac
1836
1837 # * thunderbird autoconfig setup
1838
1839 bkdomains=(expertpathologyreview.com amnimal.ninja)
1840 if [[ $HOSTNAME == bk ]]; then
1841   for domain in ${bkdomains[@]}; do
1842     m /a/exe/web-conf apache2 autoconfig.$domain
1843     dir=/var/www/autoconfig.$domain/html/mail
1844     m mkdir -p $dir
1845     # taken from mailinabox
1846     i $dir/config-v1.1.xml <<EOF
1847 <?xml version="1.0" encoding="UTF-8"?>
1848 <clientConfig version="1.1">
1849     <emailProvider id="$domain">
1850       <domain>$domain</domain>
1851
1852       <displayName>$domain Mail</displayName>
1853       <displayShortName>$domain</displayShortName>
1854
1855       <incomingServer type="imap">
1856          <hostname>mail2.iankelling.org</hostname>
1857          <port>993</port>
1858          <socketType>SSL</socketType>
1859          <username>%EMAILADDRESS%</username>
1860          <authentication>password-cleartext</authentication>
1861       </incomingServer>
1862
1863       <outgoingServer type="smtp">
1864          <hostname>mail2.iankelling.org</hostname>
1865          <port>587</port>
1866          <socketType>STARTTLS</socketType>
1867          <username>%EMAILADDRESS%</username>
1868          <authentication>password-cleartext</authentication>
1869          <addThisServer>true</addThisServer>
1870          <useGlobalPreferredServer>false</useGlobalPreferredServer>
1871       </outgoingServer>
1872
1873       <documentation url="https://$domain/">
1874          <descr lang="en">$domain website.</descr>
1875       </documentation>
1876     </emailProvider>
1877
1878     <webMail>
1879       <loginPage url="https://$domain/roundcube" />
1880       <loginPageInfo url="https://$domain/roundcube" >
1881         <username>%EMAILADDRESS%</username>
1882         <usernameField id="rcmloginuser" name="_user" />
1883         <passwordField id="rcmloginpwd" name="_pass" />
1884         <loginButton id="rcmloginsubmit" />
1885       </loginPageInfo>
1886     </webMail>
1887     <clientConfigUpdate url="https://autoconfig.$domain/mail/config-v1.1.xml" />
1888 </clientConfig>
1889 EOF
1890   done
1891 fi
1892
1893 # * roundcube setup
1894
1895 if [[ $HOSTNAME == bk ]]; then
1896
1897   # zip according to /installer
1898   # which requires adding a line to /usr/local/lib/roundcubemail/config/config.inc.php
1899   # $config['enable_installer'] = true;
1900   pi roundcube roundcube-sqlite3 php-zip apache2 php-fpm
1901
1902   ### begin composer install
1903   # https://getcomposer.org/doc/faqs/how-to-install-composer-programmatically.md
1904   # cd $(mktemp -d)
1905   # sum="$(wget -q -O - https://composer.github.io/installer.sig)"
1906   # m php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
1907   # if [[ $sum != $(php -r "echo hash_file('sha384', 'composer-setup.php');") ]]; then
1908   #   echo 'ERROR: Invalid composer installer checksum' >&2
1909   #   rm -fv composer-setup.php
1910   #   exit 1
1911   # fi
1912   # m php composer-setup.php --quiet
1913   # rm -fv composer-setup.php
1914   # m mv composer.phar /usr/local/bin
1915
1916   # the above method gets composer2, carddav plugin at least doesnt work with that
1917   # yet, it was just released 10-24-2020.
1918   m cd /usr/local/bin
1919   m wget -nv -N https://getcomposer.org/composer-1.phar
1920   chmod +x composer-1.phar
1921   ### end composer install
1922
1923   rcdirs=(/usr/local/lib/rcexpertpath /usr/local/lib/rcninja)
1924   ncdirs=(/var/www/ncninja)
1925   ncdirs=(/var/www/ncexpertpath /var/www/ncninja)
1926   # point debian cronjob to our local install, preventing daily cron error
1927
1928   # debian's cronjob will fail, remove both paths it uses just to be sure
1929   rm -fv /usr/share/roundcube/bin/cleandb.sh /etc/cron.d/roundcube-core
1930
1931   #### begin dl roundcube
1932   # note, im r2e subbed to https://github.com/roundcube/roundcubemail/releases.atom
1933   v=1.4.13; f=roundcubemail-$v-complete.tar.gz
1934   cd /root
1935   if [[ -e $f ]]; then
1936     timestamp=$(stat -c %Y $f)
1937   else
1938     timestamp=0
1939   fi
1940   m wget -nv -N https://github.com/roundcube/roundcubemail/releases/download/$v/$f
1941   new_timestamp=$(stat -c %Y $f)
1942   for rcdir in ${rcdirs[@]}; do
1943     if [[ $timestamp != "$new_timestamp" ||  ! -e "$rcdir/config/secret" ]]; then
1944       m tar -C /usr/local/lib --no-same-owner -zxf $f
1945       m rm -rf $rcdir
1946       m mv /usr/local/lib/roundcubemail-$v $rcdir
1947     fi
1948   done
1949   #### end dl roundcube
1950
1951   for ((i=0; i < ${#bkdomains[@]}; i++)); do
1952     domain=${bkdomains[i]}
1953     rcdir=${rcdirs[i]}
1954     rcbase=${rcdir##*/}
1955     ncdir=${ncdirs[i]}
1956
1957     # copied from debians cronjob
1958     i /etc/cron.d/$rcbase <<EOF
1959 #  Roundcube database cleaning: finally removes all records that are
1960 #  marked as deleted.
1961 0   5  *   *   *   www-data $rcdir/bin/cleandb.sh >/dev/null
1962 EOF
1963
1964     m /a/exe/web-conf - apache2 $domain <<EOF
1965 Alias /roundcube $rcdir
1966 ### begin roundcube settings
1967 # taken from /etc/apache2/conf-available/roundcube.conf version 1.4.8+dfsg.1-1~bpo10+1
1968 <Directory $rcdir/>
1969   Options +FollowSymLinks
1970   # This is needed to parse $rcdir/.htaccess.
1971   AllowOverride All
1972   Require all granted
1973 </Directory>
1974 # Protecting basic directories:
1975 <Directory $rcdir/config>
1976   Options -FollowSymLinks
1977   AllowOverride None
1978 </Directory>
1979 ### end roundcube settings
1980
1981
1982 ### begin nextcloud settings
1983 Alias /nextcloud "$ncdir/"
1984 <Directory $ncdir/>
1985   Require all granted
1986   AllowOverride All
1987   Options FollowSymLinks MultiViews
1988
1989   <IfModule mod_dav.c>
1990     Dav off
1991   </IfModule>
1992
1993 </Directory>
1994
1995 # based on install checker, links to
1996 # https://docs.nextcloud.com/server/19/admin_manual/issues/general_troubleshooting.html#service-discovery
1997 # their example was a bit wrong, I figured it out by adding
1998 # LogLevel warn rewrite:trace5
1999 # then watching the apache logs
2000
2001 RewriteEngine on
2002 RewriteRule ^/\.well-known/host-meta /nextcloud/public.php?service=host-meta [QSA,L]
2003 RewriteRule ^/\.well-known/host-meta\.json /nextcloud/public.php?service=host-meta-json [QSA,L]
2004 RewriteRule ^/\.well-known/webfinger /nextcloud/public.php?service=webfinger [QSA,L]
2005 RewriteRule ^/\.well-known/carddav /nextcloud/remote.php/dav/ [R=301,L]
2006 RewriteRule ^/\.well-known/caldav /nextcloud/remote.php/dav/ [R=301,L]
2007 ### end nextcloud settings
2008 EOF
2009     if [[ ! -e $rcdir/config/secret ]]; then
2010       base64 </dev/urandom | head -c24 >$rcdir/config/secret || [[ $? == 141 || ${PIPESTATUS[0]} == 32 ]]
2011     fi
2012     secret=$(cat $rcdir/config/secret)
2013
2014     rclogdir=/var/log/$rcbase
2015     rctmpdir=/var/tmp/$rcbase
2016     rcdb=/m/rc/$rcbase.sqlite
2017     # config from mailinabox
2018     i $rcdir/config/config.inc.php <<EOF
2019 <?php
2020 \$config = array();
2021 # debian creates this for us
2022 \$config['log_dir'] = '$rclogdir/';
2023 # debian also creates a temp dir, but it is under its install dir,
2024 # seems better to have our own.
2025 \$config['temp_dir'] = '$rctmpdir/';
2026 \$config['db_dsnw'] = 'sqlite:///$rcdb?mode=0640';
2027 \$config['default_host'] = 'ssl://localhost';
2028 \$config['default_port'] = 993;
2029 \$config['imap_conn_options'] = array(
2030   'ssl'         => array(
2031      'verify_peer'  => false,
2032      'verify_peer_name'  => false,
2033    ),
2034  );
2035 \$config['imap_timeout'] = 15;
2036 \$config['smtp_server'] = 'tls://127.0.0.1';
2037 \$config['smtp_conn_options'] = array(
2038   'ssl'         => array(
2039      'verify_peer'  => false,
2040      'verify_peer_name'  => false,
2041    ),
2042  );
2043 \$config['product_name'] = 'webmail';
2044 \$config['des_key'] = '$secret';
2045 \$config['plugins'] = array('archive', 'zipdownload', 'password', 'managesieve', 'jqueryui', 'carddav', 'html5_notifier');
2046 \$config['skin'] = 'elastic';
2047 \$config['login_autocomplete'] = 2;
2048 \$config['password_charset'] = 'UTF-8';
2049 \$config['junk_mbox'] = 'Spam';
2050 # disable builtin addressbook
2051 \$config['address_book_type'] = '';
2052 ?>
2053 EOF
2054
2055     m mkdir -p $rclogdir
2056     m chmod 750 $rclogdir
2057     m chown www-data:adm $rclogdir
2058     # note: subscribed to updates:
2059     # r2e add rcmcarddav https://github.com/blind-coder/rcmcarddav/commits/master.atom ian@iankelling.org
2060     # r2e add roundcube https://github.com/roundcube/roundcubemail/releases.atom ian@iankelling.org
2061     m mkdir -p $rctmpdir /m/rc
2062     m chown -R www-data.www-data $rctmpdir /m/rc
2063     m chmod 750 $rctmpdir
2064     # Ensure the log file monitored by fail2ban exists, or else fail2ban can't start.
2065     # todo: check for other mailinabox things
2066     m sudo -u www-data touch $rclogdir/errors.log
2067
2068     #### begin carddav install
2069     # This is the official roundcube carddav repo.
2070     # Install doc suggests downloading with composer, but that
2071     # didnt work, it said some ldap package for roundcube was missing,
2072     # but I dont want to download some extra ldap thing.
2073     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/INSTALL.md
2074     verf=$rcdir/plugins/carddav/myversion
2075     upgrade=false
2076     install=false
2077     v=4.0.0
2078     if [[ -e $verf ]]; then
2079       if [[ $(cat $verf) != "$v" ]]; then
2080         install=true
2081         upgrade=true
2082       fi
2083     else
2084       install=true
2085     fi
2086     if $install; then
2087       m rm -rf $rcdir/plugins/carddav
2088       tmpd=$(mktemp -d)
2089       m wget -nv -O $tmpd/t.tgz https://github.com/blind-coder/rcmcarddav/releases/download/v$v/carddav-v$v.tgz
2090       cd $rcdir/plugins
2091       tar xzf $tmpd/t.tgz
2092       rm -rf $tmpd
2093       m chown -R www-data:www-data $rcdir/plugins/carddav
2094       m cd $rcdir/plugins/carddav
2095       if $upgrade; then
2096         m sudo -u www-data composer-1.phar update --no-dev
2097       else
2098         m sudo -u www-data composer-1.phar install --no-dev
2099       fi
2100       m chown -R root:root $rcdir/plugins/carddav
2101       echo $v >$verf
2102     fi
2103
2104     # So, strangely, this worked in initial testing, but then
2105     # on first run it wouldn't show the existing contacts until
2106     # I went into the carddav settings and did "force immediate sync",
2107     # which seemed to fix things. Note, some of these settings
2108     # get initalized per/addressbook in the db, then need changing
2109     # there or through the settings menu.
2110
2111     # About categories, see https://www.davx5.com/tested-with/nextcloud
2112     # https://github.com/blind-coder/rcmcarddav/blob/master/doc/GROUPS.md
2113     i $rcdir/plugins/carddav/config.inc.php <<EOF;
2114 <?php
2115 \$prefs['_GLOBAL']['hide_preferences'] = false;
2116 \$prefs['davserver'] = array(
2117 # name in the UI is kind of dumb. This is just something short that seems to fit ok.
2118   'name'         =>  'Main',
2119   'username'     =>  '%u', // login username
2120   'password'     =>  '%p', // login password
2121   'url'          =>  'https://$domain/nextcloud/remote.php/dav/addressbooks/users/%u/contacts',
2122   'active'       =>  true,
2123   'readonly'     =>  false,
2124   'refresh_time' => '00:10:00',
2125   'fixed'        =>  array('username','password'),
2126   'use_categories' => false,
2127   'hide'        =>  false,
2128 );
2129 ?>
2130 EOF
2131     #### end carddav install
2132
2133     cd $rcdir/plugins
2134     if [[ ! -d html5_notifier ]]; then
2135       m git clone https://github.com/stremlau/html5_notifier
2136     fi
2137     cd $rcdir/plugins/html5_notifier
2138     m git pull --rebase
2139
2140     # todo: try out roundcube plugins: thunderbird labels
2141
2142     # Password changing plugin settings
2143     cat $rcdir/plugins/password/config.inc.php.dist - >$rcdir/plugins/password/config.inc.php <<'EOF'
2144 # following are from mailinabox
2145 $config['password_minimum_length'] = 8;
2146 $config['password_db_dsn'] = 'sqlite:////m/rc/users.sqlite';
2147 $config['password_query'] = 'UPDATE users SET password=%D WHERE email=%u';
2148 $config['password_dovecotpw'] = '/usr/bin/doveadm pw';
2149 $config['password_dovecotpw_method'] = 'SHA512-CRYPT';
2150 $config['password_dovecotpw_with_method'] = true;
2151 EOF
2152     # so PHP can use doveadm, for the password changing plugin
2153     m usermod -a -G dovecot www-data
2154     m usermod -a -G mail $u
2155
2156     # so php can update passwords
2157     m chown www-data:dovecot /m/rc/users.sqlite
2158     m chmod 664 /m/rc/users.sqlite
2159
2160     # Run Roundcube database migration script (database is created if it does not exist)
2161     m $rcdir/bin/updatedb.sh --dir $rcdir/SQL --package roundcube
2162     m chown www-data:www-data $rcdb
2163     m chmod 664 $rcdb
2164   done # end loop over domains and rcdirs
2165
2166   ### begin php setup for rc ###
2167   # Enable PHP modules.
2168   m phpenmod -v php mcrypt imap
2169   # dpkg says this is required
2170   m a2enmod proxy_fcgi setenvif
2171   fpm=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* (php[^ ]*-fpm)( .*|$)/\1/p') # eg: php7.4-fpm
2172   phpver=$(dpkg-query -s php-fpm | sed -nr 's/^Depends:.* php([^ ]*)-fpm( .*|$)/\1/p')
2173   m a2enconf $fpm
2174   # 3 useless guides on php fpm fcgi debian 10 later, i figure out from reading
2175   # /etc/apache2/conf-enabled/php7.3-fpm.conf
2176   m a2dismod php$phpver
2177   # according to /install, we should set date.timezone,
2178   # but that is dumb, the system already has the right zone in
2179   # $rclogdir/errors.log
2180   # todo: consider other settings in
2181   # /a/opt/mailinabox/setup/nextcloud.sh
2182   i /etc/php/$phpver/cli/conf.d/30-local.ini <<'EOF'
2183 apc.enable_cli = 1
2184 EOF
2185
2186   i /etc/php/$phpver/fpm/conf.d/30-local.ini <<'EOF'
2187 date.timezone = "America/New_York"
2188 # for nextcloud
2189 upload_max_filesize = 2000M
2190 post_max_size = 2000M
2191 # install checker, nextcloud/settings/admin/overview
2192 memory_limit = 512M
2193 EOF
2194   m systemctl restart $fpm
2195   # dunno if reload/restart is needed
2196   m systemctl reload apache2
2197   # note bk backups are defined in crontab outside this file
2198   ### end php setup for rc ###
2199
2200 fi # end roundcube setup
2201
2202 # * nextcloud setup
2203
2204 if [[ $HOSTNAME == bk ]]; then
2205   # from install checker, nextcloud/settings/admin/overview and
2206   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2207   # curl from the web installer requirement, but i switched to cli
2208   # it recommends php-file info, but that is part of php7.3-common, already got installed
2209   # with roundcube.
2210   m pi php-curl php-bz2 php-gmp php-bcmath php-imagick php-apcu
2211
2212   # https://docs.nextcloud.com/server/19/admin_manual/installation/source_installation.html
2213   cat >/etc/php/$phpver/fpm/pool.d/localwww.conf <<'EOF'
2214 [www]
2215 clear_env = no
2216 EOF
2217
2218   for ((i=0; i < ${#bkdomains[@]}; i++)); do
2219     domain=${bkdomains[i]}
2220     ncdir=${ncdirs[i]}
2221     ncbase=${ncdir##*/}
2222     m cd /var/www
2223     if [[ ! -e $ncdir/index.php ]]; then
2224       # if we wanted to only install a specific version, use something like
2225       # file=latest-22.zip
2226       file=latest.zip
2227       m wget -nv -N https://download.nextcloud.com/server/releases/$file
2228       m rm -rf nextcloud
2229       m unzip -q $file
2230       m rm -f $file
2231       m chown -R www-data.www-data nextcloud
2232       m mv nextcloud $ncdir
2233       m cd $ncdir
2234       m sudo -u www-data php occ  maintenance:install --database sqlite --admin-user iank --admin-pass $nextcloud_admin_pass
2235     fi
2236     # note, strange this happend where updater did not increment the version var,
2237     # mine was stuck on 20. I manually updated it.
2238     m cd $ncdir/config
2239     if [[ ! -e config.php-orig ]]; then
2240       m cp -a config.php config.php-orig
2241     fi
2242     cat config.php-orig - >tmp.php <<EOF
2243 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/email_configuration.html
2244 \$CONFIG["mail_smtpmode"] = "sendmail";
2245 \$CONFIG["mail_smtphost"] = "127.0.0.1";
2246 \$CONFIG["mail_smtpport"] = 25;
2247 \$CONFIG["mail_smtptimeout"] = 10;
2248 \$CONFIG["mail_smtpsecure"] = "";
2249 \$CONFIG["mail_smtpauth"] = false;
2250 \$CONFIG["mail_smtpauthtype"] = "LOGIN";
2251 \$CONFIG["mail_smtpname"] = "";
2252 \$CONFIG["mail_smtppassword"] = "";
2253 \$CONFIG["mail_domain"] = "$domain";
2254
2255 # https://github.com/nextcloud/user_external#readme
2256 # plus mailinabox example
2257 #\$CONFIG['user_backends'] = array(array('class' => 'OC_User_IMAP','arguments' => array('127.0.0.1', 143, null),),);
2258
2259
2260 # based on installer check
2261 # https://docs.nextcloud.com/server/19/admin_manual/configuration_server/caching_configuration.html
2262 \$CONFIG['memcache.local'] = '\OC\Memcache\APCu';
2263
2264 \$CONFIG['overwrite.cli.url'] = 'https://$domain/nextcloud';
2265 \$CONFIG['htaccess.RewriteBase'] = '/nextcloud';
2266 \$CONFIG['trusted_domains'] = array (
2267         0 => '$domain',
2268     );
2269 #\$CONFIG[''] = '';
2270 fwrite(STDOUT, "<?php\n\\\$CONFIG = ");
2271 var_export(\$CONFIG);
2272 fwrite(STDOUT, ";\n");
2273 EOF
2274     m php tmp.php >config.php
2275     m rm -f tmp.php
2276     m sudo -u www-data php $ncdir/occ maintenance:update:htaccess
2277     list=$(sudo -u www-data php $ncdir/occ --output=json_pretty app:list)
2278     # user_external not compaible with nc 23
2279     for app in contacts calendar; do
2280       if [[ $(printf "%s\n" "$list"| jq ".enabled.$app") == null ]]; then
2281         m sudo -u www-data php $ncdir/occ app:install $app
2282       fi
2283     done
2284     i /etc/systemd/system/$ncbase.service <<EOF
2285 [Unit]
2286 Description=ncup $ncbase
2287 After=multi-user.target
2288
2289 [Service]
2290 Type=oneshot
2291 ExecStart=/usr/local/bin/ncup $ncbase
2292 User=www-data
2293 IOSchedulingClass=idle
2294 CPUSchedulingPolicy=idle
2295 EOF
2296     i /etc/systemd/system/$ncbase.timer <<EOF
2297 [Unit]
2298 Description=ncup $ncbase timer
2299
2300 [Timer]
2301 OnCalendar=Daily
2302
2303 [Install]
2304 WantedBy=timers.target
2305 EOF
2306     systemctl enable --now $ncbase.timer
2307     i /usr/local/bin/ncup <<'EOFOUTER'
2308 #!/bin/bash
2309 if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
2310 shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
2311 set -eE -o pipefail
2312 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR
2313
2314 ncbase=$1
2315 if ! php /var/www/$ncbase/updater/updater.phar -n; then
2316   echo failed nextcloud update for $ncbase >&2
2317   /sbin/exim -t <<EOF
2318 To: alerts@iankelling.org
2319 From: root@$(hostname -f)
2320 Subject: failed nextcloud update for $ncbase
2321
2322 For logs, run: jr -u $ncbase
2323 EOF
2324 fi
2325 EOFOUTER
2326     chmod +x /usr/local/bin/ncup
2327
2328     mkdir -p /var/www/cron-errors
2329     chown www-data.www-data /var/www/cron-errors
2330     i /etc/cron.d/$ncbase <<EOF
2331 PATH=/usr/sbin:/sbin:/usr/bin:/bin:/usr/local/bin
2332 SHELL=/bin/bash
2333 # https://docs.nextcloud.com/server/20/admin_manual/configuration_server/background_jobs_configuration.html
2334 */5  *  *  *  * www-data php -f $ncdir/cron.php --define apc.enable_cli=1 |& log-once nccron
2335 EOF
2336
2337   done
2338 fi
2339
2340
2341 # * exim host conditional config
2342
2343 # ** exim certs
2344
2345 all_dirs=(/p/c/filesystem)
2346 for x in /p/c/machine_specific/*.hosts /a/bin/ds/machine_specific/*.hosts; do
2347   if grep -qxF $HOSTNAME $x; then all_dirs+=( ${x%.hosts} ); fi
2348 done
2349 files=()
2350 for d in ${all_dirs[@]}; do
2351   f=$d/etc/exim4/passwd
2352   if [[ -e $f  ]]; then
2353     files+=($f)
2354   fi
2355   tmp=($d/etc/exim4/*.pem)
2356   if (( ${#tmp[@]} )); then
2357     files+=(${tmp[@]})
2358   fi
2359 done
2360
2361 if (( ${#files[@]} )); then
2362   sudo rsync -ahhi --chown=root:Debian-exim --chmod=0640 ${files[@]} /etc/exim4/
2363 fi
2364
2365
2366 # ** exim: auth
2367
2368 case $HOSTNAME in
2369   bk|je)
2370     # avoid accepting mail for invalid users
2371     # https://wiki.dovecot.org/LMTP/Exim
2372     cat >>/etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2373 deny
2374   message = invalid recipient
2375   domains = +local_domains
2376   !verify = recipient/callout=no_cache
2377 EOF
2378     i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2379 dovecot_plain:
2380   driver = dovecot
2381   public_name = PLAIN
2382   server_socket = /var/run/dovecot/auth-client
2383   server_set_id = $auth1
2384 EOF
2385     ;;
2386 esac
2387 if $bhost_t; then
2388   i /etc/exim4/conf.d/auth/29_exim4-config_auth <<'EOF'
2389 # from 30_exim4-config_examples
2390 plain_server:
2391 driver = plaintext
2392 public_name = PLAIN
2393 server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}"
2394 server_set_id = $auth2
2395 server_prompts = :
2396 .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS
2397 server_advertise_condition = ${if eq{$tls_in_cipher}{}{}{*}}
2398 .endif
2399 EOF
2400 fi
2401
2402 # ** exim: main daemon use non-default config file
2403 case $HOSTNAME in
2404   bk|$MAIL_HOST)
2405     # to see the default comments in /etc/default/exim4:
2406     # s update-exim4defaults --force --init
2407     # which will overwrite any existing file
2408     i /etc/default/exim4 <<'EOF'
2409 QUEUERUNNER='combined'
2410 QUEUEINTERVAL='30m'
2411 COMMONOPTIONS='-C /etc/exim4/my.conf'
2412 UPEX4OPTS='-o /etc/exim4/my.conf'
2413 # i use epanic-clean for alerting if there are bad paniclog entries
2414 E4BCD_WATCH_PANICLOG='no'
2415 EOF
2416     chown Debian-exim:Debian-exim /usr/sbin/exim4
2417     # needs guid set in order to become Debian-exim
2418     chmod g+s,u+s /usr/sbin/exim4
2419     i /etc/exim4/trusted_configs <<'EOF'
2420 /etc/exim4/my.conf
2421 EOF
2422     ;;
2423   *)
2424     # default file
2425     i /etc/default/exim4 <<'EOF'
2426 QUEUERUNNER='combined'
2427 QUEUEINTERVAL='30m'
2428 EOF
2429     ;;
2430 esac
2431
2432 # ** exim non-root
2433
2434 case $HOSTNAME in
2435   bk|je|li)
2436     # no reason to expect it to ever be there.
2437     rm -fv /etc/systemd/system/exim4.service.d/nonroot.conf
2438     ;;
2439   *)
2440     dirs=()
2441     for d in /a /d /m /media /mnt /nocow /o /p /q; do
2442       if [[ -d $d ]]; then
2443         dirs+=($d)
2444       fi
2445     done
2446     i /etc/systemd/system/exim4.service.d/nonroot.conf <<EOF
2447 [Service]
2448 # see 56.2 Root privilege in exim spec
2449 AmbientCapabilities=CAP_NET_BIND_SERVICE
2450 # https://www.redhat.com/sysadmin/mastering-systemd
2451 # things that seem good and reasonabl.e
2452 PrivateTmp=yes
2453 ProtectHome=yes
2454 # note, in t10 systemd, if one of these is an sshfs mountpoint,
2455 # this whole setting doesnt work. tried it with a newer systemd 250 though
2456 # an nspawn, and it worked there.
2457 InaccessiblePaths=${dirs[@]}
2458 NoNewPrivileges=yes
2459 ProtectSystem=yes
2460
2461 # when we get newer systemd
2462 #ProtectDevices=yes
2463 EOF
2464     i /etc/exim4/conf.d/main/000_local-noroot <<'EOF'
2465 # see 56.2 Root privilege in exim spec
2466 deliver_drop_privilege = true
2467 EOF
2468     files=(
2469       300_exim4-config_real_local
2470       600_exim4-config_userforward
2471       700_exim4-config_procmail
2472       800_exim4-config_maildrop
2473       mmm_mail4root
2474     )
2475     for f in ${files[@]}; do
2476       echo "# iank: removed due to running nonroot"|i /etc/exim4/conf.d/router/$f
2477     done
2478     ;;
2479 esac
2480
2481 case $HOSTNAME in
2482
2483   # ** $MAIL_HOST|bk|je)
2484   $MAIL_HOST|bk|je)
2485
2486     echo|i /etc/exim4/conf.d/router/870_backup_local
2487
2488     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2489 # note: some things we don't set that are here by default because they are unused.
2490 dc_local_interfaces=''
2491 dc_eximconfig_configtype='internet'
2492 dc_localdelivery='dovecot_lmtp'
2493 EOF
2494     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2495 # recommended if dns is expected to work
2496 CHECK_RCPT_VERIFY_SENDER = true
2497 # default config comment says: If you enable this, you might reject legitimate mail,
2498 # but eggs has had this a long time, so that seems unlikely.
2499 CHECK_RCPT_SPF = true
2500 CHECK_RCPT_REVERSE_DNS = true
2501 CHECK_MAIL_HELO_ISSUED = true
2502
2503 # enable 587 in addition to the default 25, so that
2504 # i can send mail where port 25 is firewalled by isp
2505 daemon_smtp_ports = 25 : 587
2506 # default of 25, can get stuck when catching up on mail
2507 smtp_accept_max = 400
2508 smtp_accept_reserve = 100
2509 smtp_reserve_hosts = +iank_trusted
2510
2511 # options exim has to avoid having to alter the default config files
2512 CHECK_RCPT_LOCAL_ACL_FILE = /etc/exim4/conf.d/rcpt_local_acl
2513 CHECK_DATA_LOCAL_ACL_FILE = /etc/exim4/conf.d/data_local_acl
2514 LOCAL_DENY_EXCEPTIONS_LOCAL_ACL_FILE = /etc/exim4/conf.d/local_deny_exceptions_acl
2515 # testing dmarc
2516 #dmarc_tld_file = /etc/public_suffix_list.dat
2517 EOF
2518     ;;&
2519
2520   # ** $MAIL_HOST|bk)
2521   $MAIL_HOST|bk)
2522
2523     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2524 # je.b8.nz will run out of memory with freshclam
2525 av_scanner = clamd:/var/run/clamav/clamd.ctl
2526 EOF
2527
2528     cat >> /etc/exim4/conf.d/data_local_acl <<'EOF'
2529 deny
2530   malware = */defer_ok
2531   !condition = ${if match {$malware_name}{\N^Heuristic\N}}
2532   message = This message was detected as possible malware ($malware_name).
2533 EOF
2534
2535     cat >/etc/exim4/conf.d/main/000_local-nn <<EOF
2536 # MAIN_HARDCODE_PRIMARY_HOSTNAME might mess up the
2537 # smarthost config type, not sure.
2538 # failing message on mail-tester.com:
2539 # We check if there is a server (A Record) behind your hostname kd.
2540 # You may want to publish a DNS record (A type) for the hostname kd or use a different hostname in your mail software
2541 # https://serverfault.com/questions/46545/how-do-i-change-exim4s-primary-hostname-on-a-debian-box
2542 # and this one seemed appropriate from grepping config.
2543 # I originally set this to li.iankelling.org, but then ended up with errors when li tried to send
2544 # mail to kd, so this should basically be a name that no host has as their
2545 # canonical hostname since the actual host sits behind a nat and changes.
2546 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail.iankelling.org
2547 # I used this to avoid sender verification, didnt work but it still
2548 # makes sense based on the spec.
2549 hosts_treat_as_local = defaultnn.b8.nz
2550
2551 # Outside nn, we get the default cert location from a debian macro,
2552 # and the cert file is put in place by a certbot hook.
2553 MAIN_TLS_CERTIFICATE = /etc/exim4/fullchain.pem
2554 MAIN_TLS_PRIVATEKEY = /etc/exim4/privkey.pem
2555 EOF
2556
2557     i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost <<'EOF'
2558 gnusmarthost:
2559   debug_print = "R: smarthost for $local_part@$domain"
2560   driver = manualroute
2561   domains = ! +local_domains
2562 # send most mail through eggs, helps fsfs sender reputation.
2563 # uncomment and optionally move to 188 file to send through my own servers again
2564   senders = *@gnu.org
2565   transport = smarthost_dkim
2566   route_list = * fencepost.gnu.org::587 byname
2567   host_find_failed = ignore
2568   same_domain_copy_routing = yes
2569   no_more
2570 EOF
2571
2572     /a/exe/cedit defaultnn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2573 10.173.8.1 defaultnn.b8.nz
2574 EOF
2575     ;;&
2576   # ** $MAIL_HOST)
2577   $MAIL_HOST)
2578
2579     i /etc/exim4/conf.d/router/195_dnslookup_vpn <<'EOF'
2580 # copied from /etc/exim4/conf.d/router/200_exim4-config_primary, but
2581 # use vpn transport. lower priority so it overrides the default route.
2582 # Use this in case our vpn fails, we dont send anything without it.
2583 .ifdef DCconfig_internet
2584 dnslookup_vpn:
2585   debug_print = "R: dnslookup for $local_part@$domain"
2586   driver = dnslookup
2587   domains = ! +local_domains
2588   transport = remote_smtp_vpn
2589   same_domain_copy_routing = yes
2590   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
2591   no_more
2592 .endif
2593 EOF
2594
2595
2596     # note on backups: I used to do an automatic sshfs and restricted
2597     # permissions to a specific directory on the remote server, /bu/mnt,
2598     # which required using a dedicated user, but realized smtp will be
2599     # more reliable and less fuss. If I ever need that again, see the
2600     # history of this file, and bum in brc2.
2601
2602     i /etc/exim4/conf.d/router/890_backup_copy <<EOF
2603 ### router/900_exim4-config_local_user
2604 #################################
2605
2606 # todo, it would be nice to save sent email too,
2607 # but its not so important, they still exist in my head
2608
2609 backup_redir:
2610 driver = redirect
2611 domains = +local_domains
2612 # b is just an arbirary short string
2613 data = b@eximbackup.b8.nz
2614 # note, to test this, i could temporarily allow testignore.
2615 # alerts avoids potential mail loop. root is already
2616 # redirected earlier, so that is just being overly cautious.
2617 local_parts = ! root : ! testignore : ! alerts
2618 unseen = true
2619
2620 backup_copy:
2621 driver = manualroute
2622 domains = eximbackup.b8.nz
2623 transport = backup_remote
2624 ignore_target_hosts = ${HOSTNAME}wg.b8.nz
2625 # note changes here also require change in passwd.client
2626 route_list = * eximbackup.b8.nz
2627 same_domain_copy_routing = yes
2628 errors_to = alerts@iankelling.org
2629 no_more
2630 EOF
2631
2632
2633     i /etc/exim4/conf.d/transport/30_backup_remote <<'EOF'
2634 backup_remote:
2635   driver = smtp
2636   multi_domain
2637 .ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
2638   message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
2639 .endif
2640   hosts_require_auth = *
2641   hosts_try_auth = *
2642   envelope_to_add
2643   # manual return path because we want it to be the envelope sender
2644   # we got not the one we are using in this smtp transport
2645   headers_add = "Return-path: $sender_address"
2646 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2647   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
2648 .endif
2649 .ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2650   hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS
2651 .endif
2652 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2653   tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES
2654 .endif
2655 .ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS
2656   tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST
2657 .endif
2658 .ifdef REMOTE_SMTP_HEADERS_REWRITE
2659   headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE
2660 .endif
2661 .ifdef REMOTE_SMTP_HELO_DATA
2662   helo_data=REMOTE_SMTP_HELO_DATA
2663 .endif
2664 .ifdef TLS_DH_MIN_BITS
2665 tls_dh_min_bits = TLS_DH_MIN_BITS
2666 .endif
2667 .ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2668 tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE
2669 .endif
2670 .ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2671 tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY
2672 .endif
2673 .ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2674   headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE
2675 .endif
2676 EOF
2677
2678
2679     # this avoids some error. i cant remember what. todo:
2680     # test it out and document why/if its needed.
2681     #     i /etc/exim4/host_local_deny_exceptions <<'EOF'
2682     # mail.fsf.org
2683     # *.posteo.de
2684     # EOF
2685
2686     # cron email from smarthost hosts will automatically be to
2687     # USER@FQDN. I redirect that to alerts@, on the smarthosts, but in
2688     # case that doesn't work, we still want to accept that mail, but not
2689     # from any host except the smarthosts. local_hostnames and this rule
2690     # is for that purpose.
2691     i /etc/exim4/conf.d/rcpt_local_acl <<'EOF'
2692 deny
2693   !authenticated = *
2694   domains = +local_hostnames
2695   message = no relay
2696 EOF
2697     echo|i /etc/exim4/conf.d/router/880_universal_forward
2698
2699
2700     cat >>/etc/exim4/conf.d/main/000_local <<EOF
2701 MAILDIR_HOME_MAILDIR_LOCATION = /m/md/Sent
2702 EOF
2703
2704     # for iank@fsf.org, i have mail.fsf.org forward it to fsf@iankelling.org.
2705     # and also have mail.iankelling.org whitelisted as a relay domain.
2706     # I could avoid that if I changed this to submit to 587 with a
2707     # password like a standard mua.
2708     i /etc/exim4/conf.d/router/188_exim4-config_smarthost <<'EOF'
2709 # ian: save a copy of sent mail. i thought of other ways to
2710 # do this, for example, to only save sent mail that is not sent
2711 # from my mail client which saves a copy by default, but in the
2712 # end, it seems simplest to turn that off. We want to save
2713 # external mail sent by smarthosts.
2714 sentarchive:
2715   driver = redirect
2716   domains = ! +local_domains
2717   condition = ${if !bool{${lookup{$local_part@$domain}lsearch{/etc/exim4/ignore-sent}{true}}}}
2718   data    = vojdedIdNejyebni@b8.nz
2719   unseen
2720
2721 # ian: copied from /etc/exim4/conf.d/router/200_exim4-config_primary, and added senders = and
2722 # replaced DCsmarthost with hostname
2723 fsfsmarthost:
2724   debug_print = "R: smarthost for $local_part@$domain"
2725   driver = manualroute
2726   domains = ! +local_domains
2727   senders = *@fsf.org
2728   transport = remote_smtp_smarthost
2729   route_list = * mail.fsf.org::587 byname
2730   host_find_failed = ignore
2731   same_domain_copy_routing = yes
2732   no_more
2733
2734 posteosmarthost:
2735   debug_print = "R: smarthost for $local_part@$domain"
2736   driver = manualroute
2737   domains = ! +local_domains
2738   senders = *@posteo.net
2739   transport = remote_smtp_smarthost
2740   route_list = * posteo.de::587 byname
2741   host_find_failed = ignore
2742   same_domain_copy_routing = yes
2743   no_more
2744 EOF
2745
2746     # Greping /etc/exim4, unqualified mails this would end up as
2747     # a return path, so it should go somewhere we will see.
2748     # The debconf output about mailname is as follows:
2749     # The 'mail name' is the domain name used to 'qualify' mail addresses without a domain
2750     # name.
2751     # This name will also be used by other programs. It should be the single, fully
2752     # qualified domain name (FQDN).
2753     # Thus, if a mail address on the local host is foo@example.org, the correct value for
2754     # this option would be example.org.
2755     # This name won\'t appear on From: lines of outgoing messages if rewriting is enabled.
2756     echo iankelling.org > /etc/mailname
2757
2758
2759     # mail.iankelling.org so local imap clients can connect with tls and
2760     # when they happen to not be local.
2761     # todo: this should be 10.8.0.4
2762
2763     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2764 # note: i put nn.b8.nz into bind for good measure
2765 10.173.8.2 nn.b8.nz mx.iankelling.org
2766 EOF
2767
2768     # note: systemd-resolved will consult /etc/hosts, dnsmasq wont. this assumes
2769     # weve configured this file in dnsmasq if we are using it.
2770     /a/exe/cedit mail /etc/dnsmasq-servers.conf <<'EOF' || [[ $? == 1 ]]
2771 server=/mx.iankelling.org/127.0.1.1
2772 EOF
2773     # I used to use debconf-set-selections + dpkg-reconfigure,
2774     # which then updates this file
2775     # but the process is slower than updating it directly and then I want to set other things in
2776     # update-exim4.conf.conf, so there's no point.
2777     # The file is documented in man update-exim4.conf,
2778     # except the man page is not perfect, read the bash script to be sure about things.
2779
2780     # The debconf questions output is additional documentation that is not
2781     # easily accessible, but super long, along with the initial default comment in this
2782     # file, so I've saved that into ./mail-notes.conf.
2783     #
2784     # # TODO: remove mx.iankelling.org once systems get updated mail-setup from jan 2022
2785     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2786 # man page: is used to build the local_domains list, together with "localhost"
2787 # this is duplicated in a later router.
2788 dc_other_hostnames='iankelling.org;zroe.org;r2e.iankelling.org;mx.iankelling.org;!je.b8.nz;!bk.b8.nz;*.b8.nz;b8.nz'
2789 EOF
2790
2791
2792     # dmarc. not used currently
2793     f=/etc/cron.daily/refresh-dmarc-tld-file
2794     cat >$f <<'EOF'
2795 #!/bin/bash
2796 cd /etc
2797 wget -q -N https://publicsuffix.org/list/public_suffix_list.dat
2798 EOF
2799     m chmod 755 $f
2800
2801     ;;
2802   # ** bk
2803   ## we use this host to monitor MAIL_HOST and host a mail server for someone
2804   bk)
2805
2806     echo|i /etc/exim4/conf.d/rcpt_local_acl
2807     echo|i /etc/exim4/conf.d/router/880_universal_forward
2808
2809     /a/exe/cedit nn /etc/hosts <<'EOF' || [[ $? == 1 ]]
2810 10.173.8.2 nn.b8.nz
2811 EOF
2812
2813     sed -r -f - /etc/init.d/exim4  <<'EOF' | i /etc/init.d/exim4in
2814 s,/etc/default/exim4,/etc/default/exim4in,g
2815 s,/run/exim4/exim.pid,/run/exim4/eximin.pid,g
2816 s,(^[ #]*Provides:).*,\1 exim4in,
2817 s,(^[ #]*NAME=).*,\1"exim4in",
2818 EOF
2819     chmod +x /etc/init.d/exim4in
2820     i /etc/systemd/system/exim4in.service.d/alwaysrestart.conf <<'EOF'
2821 [Unit]
2822 # needed to continually restart
2823 StartLimitIntervalSec=0
2824
2825 [Service]
2826 Restart=always
2827 # time to sleep before restarting a service
2828 RestartSec=20
2829 EOF
2830
2831     i /etc/default/exim4in <<'EOF'
2832 # defaults but no queue runner and alternate config dir
2833 QUEUERUNNER='no'
2834 COMMONOPTIONS='-oP /run/exim4/eximin.pid'
2835 UPEX4OPTS='-d /etc/myexim4'
2836 EOF
2837
2838     echo bk.b8.nz > /etc/mailname
2839     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2840 # man page: is used to build the local_domains list, together with "localhost"
2841 dc_other_hostnames='amnimal.ninja;expertpathologyreview.com;bk.b8.nz'
2842 EOF
2843
2844     ;;
2845   # ** je
2846   je)
2847     echo je.b8.nz > /etc/mailname
2848     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2849 dc_other_hostnames='je.b8.nz'
2850 EOF
2851     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2852     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2853     echo|i /etc/exim4/conf.d/rcpt_local_acl
2854     echo|i /etc/exim4/conf.d/router/880_universal_forward
2855     ;;
2856   # ** not MAIL_HOST|bk|je
2857   *)
2858     # this one should be removed for all non mail hosts, but
2859     # bk and je never become mail_host
2860     echo|i /etc/exim4/conf.d/router/195_dnslookup_vpn
2861
2862     echo|i /etc/exim4/conf.d/router/188_exim4-config_smarthost
2863     echo|i /etc/exim4/conf.d/router/190_exim4-config_fsfsmarthost
2864     echo|i /etc/exim4/conf.d/rcpt_local_acl
2865     echo|i /etc/exim4/conf.d/router/890_backup_copy
2866     echo|i /etc/exim4/conf.d/main/000_local-nn
2867
2868
2869     if $bhost_t; then
2870       cat >>/etc/exim4/conf.d/main/000_local <<EOF
2871 MAIN_TLS_CERTIFICATE = /etc/exim4/certs/$wghost/fullchain.pem
2872 MAIN_TLS_PRIVATEKEY = /etc/exim4/certs/$wghost/privkey.pem
2873 # so we can maintiain the originals of the backups.
2874 # we wouldnt want this if we were dealing with any other
2875 # local deliveries, but we sent all others to the smarthost
2876 # which then strips the headers.
2877 envelope_to_remove = false
2878 return_path_remove = false
2879 EOF
2880     fi
2881
2882     # catches things like cronjob email
2883     i /etc/exim4/conf.d/router/880_universal_forward <<'EOF'
2884 universal_forward:
2885   driver = redirect
2886   domains = +local_domains
2887   data = alerts@iankelling.org
2888 EOF
2889
2890
2891     for unit in ${nn_progs[@]}; do
2892       f=/etc/systemd/system/$unit.service.d/nn.conf
2893       rm -fv $f
2894     done
2895
2896     # dont i dont care if defaultnn section gets left, it wont
2897     # get used.
2898     echo | /a/exe/cedit nn /etc/hosts || [[ $? == 1 ]]
2899     echo | /a/exe/cedit mail /etc/dnsmasq-servers.conf || [[ $? == 1 ]]
2900
2901
2902     if $bhost_t; then
2903       install -d /bu
2904       install -d -g Debian-exim -o Debian-exim -m 771 /bu/md
2905       if [[ -e /bu/md/cur && $(stat -c %u /bu/md/cur) == 1000 ]]; then
2906         chown -R Debian-exim:Debian-exim /bu/md
2907       fi
2908       i /etc/exim4/conf.d/transport/30_backup_maildir <<EOF
2909 # modified debian maildir transport
2910 backup_maildir:
2911   driver = appendfile
2912   directory = /bu/md
2913   delivery_date_add
2914   # note, no return path or envelope added
2915   maildir_format
2916   directory_mode = 0700
2917   mode = 0644
2918   mode_fail_narrower = false
2919 EOF
2920
2921       i /etc/exim4/conf.d/router/870_backup_local <<'EOF'
2922 ### router/900_exim4-config_local_user
2923 #################################
2924
2925 backup_local:
2926   debug_print = "R: local_user for $local_part@$domain"
2927   driver = accept
2928   domains = eximbackup.b8.nz
2929   transport = backup_maildir
2930 EOF
2931
2932       # Bind to wghole to receive mailbackup.
2933       wgholeip=$(sed -rn 's/^ *Address *= *([^/]+).*/\1/p' /etc/wireguard/wghole.conf)
2934       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2935 dc_other_hostnames='eximbackup.b8.nz'
2936 dc_local_interfaces='127.0.0.1;::1;$wgholeip'
2937 EOF
2938
2939       # wghole & thus exim will fail to start without internet connectivity.
2940       i /etc/systemd/system/exim4.service.d/backup.conf <<'EOF'
2941 [Unit]
2942 StartLimitIntervalSec=0
2943
2944 [Service]
2945 Restart=always
2946 RestartSec=20
2947 EOF
2948
2949     else
2950       cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2951 # Note: If theres like a temporary problem where mail gets sent to
2952 # one of these hosts, if exim isnt listening, it will be a temporary error
2953 # instead of a permanent 5xx.
2954 dc_local_interfaces='127.0.0.1;::1'
2955 EOF
2956       rm -fv /etc/systemd/system/exim4.service.d/backup.conf
2957     fi
2958     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2959 dc_eximconfig_configtype='smarthost'
2960 dc_smarthost='$smarthost'
2961 EOF
2962
2963     hostname -f |i /etc/mailname
2964     cat >>/etc/exim4/update-exim4.conf.conf <<EOF
2965 # The manpage incorrectly states this will do header rewriting, but
2966 # that only happens if we have dc_hide_mailname is set.
2967 dc_readhost='iankelling.org'
2968 # Only used in case of bounces.
2969 dc_localdelivery='maildir_home'
2970 EOF
2971     ;;
2972 esac
2973
2974
2975
2976
2977 # ** $MAILHOST|bk, things that belong at the end
2978 case $HOSTNAME in
2979   $MAIL_HOST|bk)
2980     # config for the non-nn exim
2981     m rsync -ra --delete /etc/exim4/ /etc/myexim4
2982     cat >>/etc/myexim4/conf.d/main/000_local-nn <<'EOF'
2983 # this makes it easier to see which exim is doing what
2984 log_file_path = /var/log/exim4/my%s
2985 EOF
2986
2987     cat >/etc/logrotate.d/myexim <<'EOF'
2988 /var/log/exim4/mymain /var/log/exim4/myreject {
2989         daily
2990         missingok
2991         rotate 1000
2992         delaycompress
2993         notifempty
2994         nocreate
2995 }
2996 /var/log/exim4/mypanic {
2997         size 10M
2998         missingok
2999         rotate 10
3000         compress
3001         delaycompress
3002         notifempty
3003         nocreate
3004 }
3005 EOF
3006
3007     # If we ever wanted to have a separate spool,
3008     # we could do it like this.
3009     #     cat >>/etc/exim4/conf.d/main/000_local-nn <<'EOF'
3010     # spool_directory = /var/spool/myexim4
3011     # EOF
3012     cat >>/etc/myexim4/update-exim4.conf.conf <<'EOF'
3013 dc_eximconfig_configtype='smarthost'
3014 dc_smarthost='nn.b8.nz'
3015 EOF
3016     ;;&
3017   bk)
3018
3019     # config for the non-nn exim
3020     cat >/etc/myexim4/conf.d/main/000_local-nn <<'EOF'
3021 MAIN_HARDCODE_PRIMARY_HOSTNAME = mail2.iankelling.org
3022 EOF
3023     ;;
3024   $MAIL_HOST)
3025     # for bk, we have a exim4in.service that will do this for us.
3026     m update-exim4.conf -d /etc/myexim4
3027     ;;
3028 esac
3029
3030 # * spool dir setup
3031
3032 # ** bind mount setup
3033 # put spool dir in directory that spans multiple distros.
3034 # based on http://www.postfix.org/qmgr.8.html and my notes in gnus
3035 #
3036 dir=/nocow/exim4
3037 sdir=/var/spool/exim4
3038 # we only do this if our system has $dir
3039
3040 # this used to do a symlink, but, in the boot logs, /nocow would get mounted succesfully,
3041 # about 2 seconds later, exim starts, and immediately puts into paniclog:
3042 # honVi-0000u3-82 Failed to create directory "/var/spool/exim4/input": No such file or directory
3043 # so, im trying a bind mount to get rid of that.
3044 if [[ -e /nocow ]]; then
3045   if ! grep -Fx "/nocow/exim4  /var/spool/exim4  none  bind  0 0" /etc/fstab; then
3046     echo "/nocow/exim4  /var/spool/exim4  none  bind  0 0" >>/etc/fstab
3047   fi
3048   i /etc/systemd/system/exim4.service.d/override.conf <<'EOF'
3049 [Unit]
3050 # without local-fs on exim, we get these kind of errors in paniclog on shutdown:
3051 # Failed to create spool file /var/spool/exim4//input//1jCLxz-0008V4-V9-D: Permission denied
3052 After=local-fs.target
3053
3054 [Service]
3055 ExecStartPre=/usr/local/bin/exim-nn-iptables
3056 EOF
3057   if ! mountpoint -q $sdir; then
3058     stopifactive exim4 exim4in
3059     if [[ -L $sdir ]]; then
3060       m rm $sdir
3061     fi
3062     if [[ ! -e $dir && -d $sdir ]]; then
3063       m mv $sdir $dir
3064     fi
3065     if [[ ! -d $sdir ]]; then
3066       m mkdir $sdir
3067       m chmod 000 $sdir # only want it to be used when its mounted
3068     fi
3069     m mount $sdir
3070   fi
3071 fi
3072
3073
3074
3075 # ** exim/spool uid setup
3076 # i have the spool directory be common to distro multi-boot, so
3077 # we need the uid to be the same. 608 cuz it's kind of in the middle
3078 # of the free system uids.
3079 IFS=:; read -r _ _ uid _ < <(getent passwd Debian-exim ||:) ||:; unset IFS
3080 IFS=:; read -r _ _ gid _ < <(getent group Debian-exim ||:) ||:; unset IFS
3081 if [[ ! $uid ]]; then
3082   # from /var/lib/dpkg/info/exim4-base.postinst, plus uid and gid options
3083   m adduser --uid 608 --system --group --quiet --home /var/spool/exim4 \
3084     --no-create-home --disabled-login --force-badname Debian-exim
3085 elif [[ $uid != 608 ]]; then
3086   stopifactive exim4 exim4in
3087   m usermod -u 608 Debian-exim
3088   m groupmod -g 608 Debian-exim
3089   m usermod -g 608 Debian-exim
3090   m find / /nocow -xdev -path ./var/tmp -prune -o -uid $uid -execdir chown -h 608 {} +
3091   m find / /nocow -xdev -path ./var/tmp -prune -o -gid $gid -execdir chgrp -h 608 {} +
3092 fi
3093
3094 # * start / stop services
3095
3096 reifactive dnsmasq nscd
3097
3098 if $reload; then
3099   m systemctl daemon-reload
3100 fi
3101
3102 sysd-prom-fail-install epanicclean
3103 m systemctl --now enable epanicclean
3104
3105 case $HOSTNAME in
3106   je)
3107     /a/exe/web-conf apache2 je.b8.nz
3108     ;;
3109   bk)
3110     /a/exe/web-conf apache2 mail2.iankelling.org
3111     ;;
3112 esac
3113
3114 m /a/bin/ds/mail-cert-cron -1
3115 sre mailcert.timer
3116
3117 case $HOSTNAME in
3118   $MAIL_HOST|bk)
3119     m systemctl --now enable mailnn mailnnroute
3120     ;;&
3121   $MAIL_HOST)
3122     # we use dns to start wg
3123     if $reload; then
3124       sre unbound
3125     else
3126       m systemctl --now enable unbound
3127     fi
3128     ;;&
3129   $MAIL_HOST|bk)
3130     # If these have changes, id rather manually restart it, id rather
3131     # not restart and cause temporary errors
3132     if $reload; then
3133       sre $vpnser
3134     else
3135       m systemctl --now enable $vpnser
3136     fi
3137     if ! systemctl is-active clamav-daemon >/dev/null; then
3138       m systemctl --now enable clamav-daemon
3139       out=$(rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/filesystem/etc/systemd/system/epanicclean.service /etc/systemd/system)
3140       if [[ $out ]]; then
3141         reload=true
3142       fi
3143
3144       # note, this will cause paniclog entries because it takes like 45
3145       # seconds for clamav to start, i use ./epanic-clean to remove
3146       # them.
3147     fi
3148     ;;&
3149   $MAIL_HOST|bk|je)
3150     # start spamassassin/dovecot before exim.
3151     sre dovecot spamassassin
3152     # need to wait a bit before restarting exim, else I
3153     # get a paniclog entry like: spam acl condition: all spamd servers failed
3154     sleep 3
3155     m systemctl --now enable mailclean.timer
3156     ;;&
3157   $MAIL_HOST)
3158     # < 2.1 (eg: in t9), uses a different data format which required manual
3159     # migration. dont start if we are running an old version.
3160     if dpkg --compare-versions $(dpkg -s radicale | awk '$1 == "Version:" { print $2 }') ge 2.1; then
3161       m systemctl --now enable radicale
3162     fi
3163     ;;&
3164 esac
3165
3166 # last use of $reload happens in previous block
3167 rm -f /var/local/mail-setup-reload
3168
3169
3170 case $HOSTNAME in
3171   $MAIL_HOST|bk|je|li)
3172     # on li, these are never started, except $vpnser
3173     :
3174     ;;
3175   *)
3176     soff radicale mailclean.timer dovecot spamassassin $vpnser mailnn clamav-daemon
3177     ;;
3178 esac
3179
3180 sre exim4
3181
3182 case $HOSTNAME in
3183   $MAIL_HOST)
3184     m systemctl --now enable mailbindwatchdog
3185     ;;
3186   *)
3187     soff mailbindwatchdog
3188     ;;
3189 esac
3190
3191
3192 case $HOSTNAME in
3193   bk) sre exim4in ;;
3194 esac
3195
3196 # * mail monitoring / testing
3197
3198 # note, to test clamav, send an email with body that only contains
3199 # https://en.wikipedia.org/wiki/EICAR_test_file
3200 # which set malware_name to Eicar-Signature
3201 case $HOSTNAME in
3202   $MAIL_HOST|bk|je)
3203     # note: cronjob "ian" also does some important monitoring
3204     # todo: this will sometimes cause an alert because mailtest-check will run
3205     # before we have setup network namespace and spamassassin
3206     i /etc/cron.d/mailtest <<EOF
3207 SHELL=/bin/bash
3208 PATH=/usr/bin:/bin:/usr/local/bin
3209 MAILTO=daylert@iankelling.org
3210 */5  * * * *   $u send-test-forward |& log-once send-test-forward
3211 */10 * * * *   root chmod -R g+rw /m/md/bounces |& log-once -1 bounces-chmod
3212 # if a bounce happened yesterday, dont let it slip through the cracks
3213 8   1 * * *   root export MAILTO=alerts@iankelling.org; [[ -s /var/log/exim4/mainlog.1 ]] && awk '\$5 == "**"' /var/log/exim4/mainlog.1
3214 EOF
3215
3216
3217     m sudo rsync -ahhi --chown=root:root --chmod=0755 \
3218       /b/ds/mailtest-check /b/ds/check-remote-mailqs /usr/local/bin/
3219     i /etc/systemd/system/mailtest-check.service <<'EOF'
3220 [Unit]
3221 Description=mailtest-check
3222 After=local-fs.target
3223 StartLimitIntervalSec=0
3224
3225 [Service]
3226 Type=simple
3227 ExecStart=/usr/local/bin/mailtest-check slow
3228 Restart=always
3229 RestartSec=60
3230
3231 [Install]
3232 WantedBy=graphical.target
3233 EOF
3234     sysd-prom-fail-install mailtest-check
3235     sre mailtest-check
3236     ;;&
3237   $MAIL_HOST)
3238     test_froms=(ian@iankelling.org z@zroe.org iank@gnu.org)
3239     test_tos=(testignore@expertpathologyreview.com testignore@je.b8.nz testignore@amnimal.ninja jtuttle@gnu.org)
3240
3241     cat >>/etc/cron.d/mailtest <<EOF
3242 0   13 * * *  root echo "1pm alert. You are not in the matrix."
3243 2   * * * *   root check-remote-mailqs |& log-once check-remote-mailqs
3244 EOF
3245     ;;&
3246   bk)
3247     test_froms=(testignore@amnimal.ninja testignore@expertpathologyreview.com)
3248     test_tos=(testignore@iankelling.org testignore@je.b8.nz)
3249     # We dont need to send from different addresses to the same
3250     # address. this breaks down our nice elegant logic of building up
3251     # froms and tos , so I just handle expertpath in a special case
3252     # below and set the to: to be testignore@zroe.org.  If we did sent
3253     # that way, it would also mess up our mailtest-check logic that
3254     # finds which messages to check.
3255     # for example: from testignore@amnimal.ninja to: testignore@iankelling.org testignore@zroe.org
3256     # that would become 2 messages and we'd only check 1.
3257     ;;&
3258   je)
3259     test_froms=(testignore@je.b8.nz)
3260     test_tos=(testignore@iankelling.org testignore@zroe.org testignore@expertpathologyreview.com testignore@amnimal.ninja)
3261     ;;&
3262   $MAIL_HOST|bk|je)
3263
3264     # Dont put these test messages into the sent folder or else it will
3265     # overwhelm it, plus i dont want to save a copy at all.
3266     rm -f /etc/exim4/ignore-sent
3267     for t in ${test_tos[@]}; do
3268       echo $t >> /etc/exim4/ignore-sent
3269     done
3270
3271     cat >/usr/local/bin/send-test-forward <<'EOF'
3272 #!/bin/bash
3273 # we remove from the queue older than 4.3 minutes since we send every 5 minutes.
3274 olds=(
3275 $(/usr/sbin/exiqgrep -o 260 -i -r '^(testignore@(iankelling\.org|zroe\.org|expertpathologyreview\.com|amnimal\.ninja|je\.b8\.nz)|jtuttle@gnu\.org)$')
3276 )
3277 if (( ${#olds[@]} )); then
3278   /usr/sbin/exim -Mrm "${olds[@]}" >/dev/null
3279 fi
3280 EOF
3281     for test_from in ${test_froms[@]}; do
3282
3283       test_to=${test_tos[0]}
3284       for t in ${test_tos[@]:1}; do
3285         test_to+=", $t"
3286       done
3287       case $test_from in
3288         testignore@expertpathologyreview.com)
3289           test_to=testignore@zroe.org
3290           ;;
3291       esac
3292
3293       cat >>/usr/local/bin/send-test-forward <<EOFOUTER
3294 /usr/sbin/exim -f $test_from -t <<EOF
3295 From: $test_from
3296 To: $test_to
3297 Subject: test \$(date +%Y-%m-%dT%H:%M:%S%z) \$EPOCHSECONDS
3298
3299 /usr/local/bin/send-test-forward
3300 EOF
3301 EOFOUTER
3302     done
3303     m chmod +x /usr/local/bin/send-test-forward
3304     ;;
3305   *)
3306     soff mailtest-check.service
3307     rm -fv /etc/cron.d/mailtest \
3308        /var/lib/prometheus/node-exporter/mailtest-check.prom* \
3309        /var/local/cron-errors/check-remote-mailqs*
3310     ;;
3311 esac
3312
3313
3314
3315 # * misc
3316 m sudo -u $u mkdir -p /home/$u/.cache
3317 set -- /m/mucache /home/$u/.cache/mu /m/.mu /home/$u/.mu
3318 while (($#)); do
3319   target=$1
3320   f=$2
3321   shift 2
3322   if [[ ! -L $f ]]; then
3323     if [[ -e $f ]]; then
3324       rm -rf $f
3325     fi
3326     m sudo -u $u ln -sf -T $target $f
3327   fi
3328 done
3329
3330
3331 # /etc/alias setup is debian specific, and exim postinst script sets up
3332 # an /etc/alias from root to the postmaster, based on the question
3333 # exim4-config exim4/dc_postmaster, as long as there exists an entry for
3334 # root, or there was no preexisting aliases file. postfix won\'t set up
3335 # a root to $postmaster alias if it\'s already installed. Easiest to
3336 # just set it ourselves.
3337
3338 # debconf question for postmaster:
3339 # Mail for the 'postmaster', 'root', and other system accounts needs to be redirected
3340 # to the user account of the actual system administrator.
3341 # If this value is left empty, such mail will be saved in /var/mail/mail, which is not
3342 # recommended.
3343 # Note that postmaster\'s mail should be read on the system to which it is directed,
3344 # rather than being forwarded elsewhere, so (at least one of) the users listed here
3345 # should not redirect their mail off this machine. A 'real-' prefix can be used to
3346 # force local delivery.
3347 # Multiple user names need to be separated by spaces.
3348 # Root and postmaster mail recipient:
3349
3350 m exit 0
3351 :
3352
3353 # Local Variables:
3354 # eval: (outline-minor-mode)
3355 # outline-regexp: "\\( *\\)# [*]\\{1,8\\} "
3356 # End:
3357 # this is combined with defining outline-level in init.el