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