X-Git-Url: https://iankelling.org/git/?a=blobdiff_plain;f=mail-setup;h=c40c56c0b6eab97923f57686a5c617eaed7040ca;hb=5abdcfce00c6ff61bf3856f7b5101915dc096107;hp=71b086b72b85f4621a0fa10686b9b866f1ce43b2;hpb=b18dade73dedfe69aa741f8417947d83c4208f2d;p=distro-setup diff --git a/mail-setup b/mail-setup index 71b086b..c40c56c 100755 --- a/mail-setup +++ b/mail-setup @@ -3,14 +3,26 @@ # Copyright (C) 2019 Ian Kelling # SPDX-License-Identifier: AGPL-3.0-or-later +# todo: max line length macro changed in t11. look into it +# todo: check that all macros we use are still valid in t11 + +# todo: setup an alert for bouncing test emails. + +# todo: bounces to my fsf mail can come from fsf@iankelling.org, +# think about making bounces go from the original address. + +# todo: add a prometheus alert for dovecot. + # todo: handle errors like this: # Mar 02 12:44:26 kw systemd[1]: exim4.service: Found left-over process 68210 (exim4) in control group while starting unit. Ignoring. # Mar 02 12:44:26 kw systemd[1]: This usually indicates unclean termination of a previous run, or service implementation deficiencies. +#eg: on eggs, on may 1st, ps grep for exim, 2 daemons running. 1 leftover from a month ago +#Debian-+ 1954 1 0 36231 11560 4 Apr02 ? 00:40:25 /usr/sbin/exim4 -bd -q30m +#Debian-+ 23058 1954 0 36821 10564 0 20:38 ? 00:00:00 /usr/sbin/exim4 -bd -q30m # 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. # todo: consider hardening cups listening on 0.0.0.0 # todo: stop/disable local apache, and rpc.mountd, and kdeconnect when not in use. -# todo: check that spamd and unbound only listen locally. # todo: hosts should only allow external mail that is authed and # destined for backup route. it is a minor issue since traffic is @@ -22,12 +34,6 @@ # todo: run mailping test after running, or otherwise # clear out terminal alert -# todo: reinstall bk with bigger filesystem - -# todo: on bk, dont send email if mailvpn is not up - -# todo: mailtest-check should check on bk too - # todo: disable postgrey # todo: in testforward-check, we should also look @@ -286,7 +292,8 @@ i() { # install file local base="${dest##*/}" local dir="${dest%/*}" if [[ $dir != "$base" ]]; then - mkdir -p ${dest%/*} + # dest has a directory component + mkdir -p "$dir" fi ir=false # i result tmpdir=$(mktemp -d) @@ -342,7 +349,6 @@ stopifactive() { mxhost=mx.iankelling.org mxport=587 -forward=$u@$mxhost # old setup. left as comment for example # mxhost=mail.messagingengine.com @@ -385,11 +391,17 @@ EOF fi # light version of exim does not have sasl auth support. -pi-nostart exim4 exim4-daemon-heavy spamassassin openvpn unbound clamav-daemon wireguard +# note: for bitfolk hosts, unbound has important config with conflink. +pi-nostart exim4 exim4-daemon-heavy spamassassin unbound clamav-daemon wireguard # note: pyzor debian readme says you need to run some initialization command # but its outdated. pi spf-tools-perl p0f postgrey pyzor razor jq moreutils certbot fail2ban +case $HOSTNAME in + je) : ;; + # not included due to using wireguard: openvpn + *) pi wget git unzip iptables ;; +esac # bad packages that sometimes get automatically installed pu openresolv resolvconf @@ -450,7 +462,7 @@ m usermod -a -G Debian-exim clamav i /etc/systemd/system/clamav-daemon.service.d/fix.conf <&2 - exit 1 - fi - ;; -esac + + +## needed only for openvpn mail vpn. +# if [[ -e /p/c/filesystem ]]; then +# # note, man openvpn implies we could just call mail-route on vpn startup/shutdown with +# # systemd, buuut it can remake the tun device unexpectedly, i got this in the log +# # after my internet was down for a bit: +# # NOTE: Pulled options changed on restart, will need to close and reopen TUN/TAP device. +# m /a/exe/vpn-mk-client-cert -b mailclient -n mail li.iankelling.org +# fi + +# With openvpn, I didn't get around to persisting the openvpn +# cert/configs into /p/c/machine_specific/bk, so I had this case to +# manually get the cert. However, we aren't using openvpn anymore, so it +# is commented out. +# +# case $HOSTNAME in +# bk) +# if [[ ! -e /etc/openvpn/client/mail.conf ]]; then +# 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 +# exit 1 +# fi +# ;; +# esac m rsync -aiSAX --chown=root:root --chmod=g-s /a/bin/ds/mail-cert-cron /usr/local/bin @@ -938,6 +1016,14 @@ enabled = true port = 25,587 filter = exim banaction = iptables-exim + +# 209.51.188.13 = mail.fsf.org +# 2001:470:142::13 = mail.fsf.org +# 209.51.188.92 = eggs.gnu.org +# 2001:470:142:3::10 = eggs.gnu.org +# 72.14.176.105 2600:3c00:e000:280::2 = mail.iankelling.org +# 10.173.8.1 = non-nn net +ignoreip = 209.51.188.13 2001:470:142::13 209.51.188.92 2001:470:142:3::10 72.14.176.105 2600:3c00:e000:280::2 10.173.8.1 EOF if $ir; then m systemctl restart fail2ban @@ -975,10 +1061,8 @@ awk 'BEGIN { FS = ":" } ; $6 ~ /^\/home/ && $7 !~ /\/nologin$/ { print $1 }' /et esac done -if ! grep -q "^ncsoft:" /etc/aliases; then - echo "ncsoft: graceq2323@gmail.com" |m tee -a /etc/aliases -fi +. /a/bin/bash_unpublished/priv-mail-setup m gpasswd -a iank adm #needed for reading logs @@ -1047,12 +1131,29 @@ rm -fv /etc/exim4/conf.d/retry/37_retry cat >/etc/exim4/conf.d/retry/17_retry <<'EOF' # Retry fast for my own domains -iankelling.org * F,1d,10m;F,14d,1h -amnimal.ninja * F,1d,10m;F,14d,1h -expertpathologyreview.com * F,1d,10m;F,14d,1h -je.b8.nz * F,1d,10m;F,14d,1h -zroe.org * F,1d,10m;F,14d,1h +iankelling.org * F,1d,4m;F,14d,1h +amnimal.ninja * F,1d,4m;F,14d,1h +expertpathologyreview.com * F,1d,4m;F,14d,1h +je.b8.nz * F,1d,4m;F,14d,1h +zroe.org * F,1d,4m;F,14d,1h eximbackup.b8.nz * F,1d,4m;F,14d,1h + +# The spec says the target domain will be used for temporary host errors, +# but i've found that isn't correct, the hostname is required +# at least sometimes. +nn.b8.nz * F,1d,4m;F,14d,1h +defaultnn.b8.nz * F,1d,4m;F,14d,1h +mx.iankelling.org * F,1d,4m;F,14d,1h +bk.b8.nz * F,1d,4m;F,14d,1h +eggs.gnu.org * F,1d,4m;F,14d,1h +fencepost.gnu.org * F,1d,4m;F,14d,1h + +# afaik our retry doesnt need this, but just using everything +mx.amnimal.ninja * F,1d,4m;F,14d,1h +mx.expertpathologyreview.com * F,1d,4m;F,14d,1h + + +mail.fsf.org * F,1d,15m;F,14d,1h EOF @@ -1066,6 +1167,27 @@ cat >/etc/exim4/conf.d/main/000_local2 </etc/exim4/conf.d/transport/11_iank <<'EOF' +# This unsets the default macro defined in on t11 in +# /etc/exim4/conf.d/transport/10_exim4-config_transport-macros +# It seems like a very odd choice that this has become +# the default in t11. Normal smarthost clients use username/password +# auth. Oh well. +REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS == +EOF +else + rm -f /etc/exim4/conf.d/transport/11_iank +fi + cat >/etc/exim4/conf.d/main/000_local <<'EOF' MAIN_TLS_ENABLE = true @@ -1100,13 +1222,7 @@ smtp_accept_queue_per_connection = 500 DKIM_CANON = relaxed DKIM_SELECTOR = li -# from comments in -# https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4 -# and its best for this to align https://tools.ietf.org/html/rfc7489#page-8 -# There could be some circumstance when the -# from: isnt our domain, but the envelope sender is -# and so still want to sign, but I cant think of any case. -DKIM_DOMAIN = ${lc:${domain:$rh_from:}} + # The file is based on the outgoing domain-name in the from-header. # sign if key exists DKIM_PRIVATE_KEY = ${if exists{/etc/exim4/${dkim_domain}-private.pem} {/etc/exim4/${dkim_domain}-private.pem}} @@ -1120,17 +1236,17 @@ DKIM_SIGN_HEADERS = mime-version:in-reply-to:references:from:date:subject:to domainlist local_hostnames = ! je.b8.nz : ! bk.b8.nz : *.b8.nz : b8.nz -hostlist iank_trusted = <; \\ +hostlist iank_trusted = <; \ # veth0 -10.173.8.1 ; \\ +10.173.8.1 ; \ # li li_ip6 -72.14.176.105 ; 2600:3c00::f03c:91ff:fe6d:baf8 ; \\ +72.14.176.105 ; 2600:3c00::f03c:91ff:fe6d:baf8 ; \ # li_vpn_net li_vpn_net_ip6s -10.8.0.0/24; 2600:3c00:e000:280::/64 ; 2600:3c00:e002:3800::/56 ; \\ +10.8.0.0/24; 2600:3c00:e000:280::/64 ; 2600:3c00:e002:3800::/56 ; \ # bk bk_ip6 -85.119.83.50 ; 2001:ba8:1f1:f0c9::2 ; \\ +85.119.83.50 ; 2001:ba8:1f1:f0c9::2 ; \ # je je_ipv6 -85.119.82.128 ; 2001:ba8:1f1:f09d::2 ; \\ +85.119.82.128 ; 2001:ba8:1f1:f09d::2 ; \ # fsf_mit_net fsf_mit_net_ip6 fsf_net fsf_net_ip6 fsf_office_net 18.4.89.0/24 ; 2603:3005:71a:2e00::/64 ; 209.51.188.0/24 ; 2001:470:142::/48 ; 74.94.156.208/28 @@ -1146,8 +1262,37 @@ delay_warning_condition = ${if or {\ } {no}{yes}} +# enable 587 in addition to the default 25, so that +# i can send mail where port 25 is firewalled by isp +daemon_smtp_ports = 25 : 587 +# default of 25, can get stuck when catching up on mail +smtp_accept_max = 400 +smtp_accept_reserve = 100 +smtp_reserve_hosts = +iank_trusted + +# Rules that make receiving more liberal should be on backup hosts +# so that we dont reject mail accepted by MAIL_HOST +LOCAL_DENY_EXCEPTIONS_LOCAL_ACL_FILE = /etc/exim4/conf.d/local_deny_exceptions_acl EOF +if dpkg --compare-versions "$(dpkg-query -f='${Version}\n' --show exim4)" ge 4.94; then + cat >>/etc/exim4/conf.d/main/000_local <<'EOF' +# In t11, we cant do the old anymore because this is tainted data used in a file lookup. +# /usr/share/doc/exim4/NEWS.Debian.gz suggests to use lookups to untaint data. +DKIM_DOMAIN = ${lookup {${domain:$rh_from:}}lsearch,ret=key{/etc/exim4/conf.d/my-dkim-domains}} +EOF +else + cat >>/etc/exim4/conf.d/main/000_local <<'EOF' +# From comments in +# https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4 +# and its best for this to align https://tools.ietf.org/html/rfc7489#page-8 +# There could be some circumstance when the +# from: isnt our domain, but the envelope sender is +# and so still want to sign, but I cant think of any case. +DKIM_DOMAIN = ${lc:${domain:$rh_from:}} +EOF +fi + rm -fv /etc/exim4/rcpt_local_acl # old path i /etc/exim4/conf.d/local_deny_exceptions_acl <<'EOF' @@ -1166,6 +1311,7 @@ accept EOF rm -fv /etc/exim4/data_local_acl # old path + i /etc/exim4/conf.d/data_local_acl <<'EOF' # Except for the "condition =", this was # a comment in the check_data acl. The comment about this not @@ -1184,6 +1330,8 @@ warn warn !hosts = +iank_trusted + # Smarthosts connect with residential ips and thus get flagged as spam if we do a spam check. + !authenticated = plain_server:login_server condition = ${if < {$message_size}{5000K}} spam = Debian-exim:true add_header = X-Spam_score_int: $spam_score_int @@ -1192,11 +1340,6 @@ warn add_header = X-Spam_report: $spam_report add_header = X-Spam_action: $spam_action -warn - condition = ${if def:malware_name} - remove_header = Subject: - add_header = Subject: [Clamav warning: $malware_name] $h_subject - log_message = heuristic malware warning: $malware_name #accept # spf = pass:fail:softfail:none:neutral:permerror:temperror @@ -1205,6 +1348,202 @@ warn EOF +# It is important for this to exist universally, instead of +# just on the mail host because if we change mail host and +# still have something in the queue which was destined for +# this router, but hosts were unreachable, the routers will +# be reevaluated on the next retry. +i /etc/exim4/conf.d/router/890_backup_copy < {$max_received_linelength}{998} {1}{0}} -.endif + message_linelength_limit = 2097152 .ifdef REMOTE_SMTP_HOSTS_AVOID_TLS hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS .endif @@ -1299,10 +1636,8 @@ i /etc/exim4/conf.d/transport/30_smarthost_dkim <<'EOF' smarthost_dkim: debug_print = "T: remote_smtp_smarthost for $local_part@$domain" driver = smtp + message_linelength_limit = 2097152 multi_domain -.ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT - message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}} -.endif hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \ {\ ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\ @@ -1401,13 +1736,10 @@ if mailhost; then i /etc/systemd/system/radicale.service.d/override.conf <tmp.php <$myncdir/tmp.php <config.php - m rm tmp.php - m sudo -u www-data php $ncdir/occ maintenance:update:htaccess + e running php $myncdir/tmp.php + # note: we leave it around place for debugging + php $myncdir/tmp.php >config.php + cd $ncdir + m sudo -u www-data php occ maintenance:update:htaccess list=$(sudo -u www-data php $ncdir/occ --output=json_pretty app:list) # user_external not compaible with nc 23 for app in contacts calendar; do if [[ $(printf "%s\n" "$list"| jq ".enabled.$app") == null ]]; then - m sudo -u www-data php $ncdir/occ app:install $app + cd $ncdir + m sudo -u www-data php occ app:install $app fi done i /etc/systemd/system/$ncbase.service <&2; exit 1; fi -shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4 -set -eE -o pipefail -trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR -ncbase=$1 -if ! php /var/www/$ncbase/updater/updater.phar -n; then +source /usr/local/lib/err + +m() { printf "%s\n" "$*"; "$@"; } +err-cleanup() { echo failed nextcloud update for $ncbase >&2 - /sbin/exim -t <>/etc/exim4/conf.d/main/000_local < {$max_received_linelength}{998} {1}{0}} -.endif - hosts_require_auth = * - hosts_try_auth = * - envelope_to_add - # manual return path because we want it to be the envelope sender - # we got not the one we are using in this smtp transport - headers_add = "Return-path: $sender_address" -.ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS - hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS -.endif -.ifdef REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS - hosts_require_tls = REMOTE_SMTP_SMARTHOST_HOSTS_REQUIRE_TLS -.endif -.ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES - tls_verify_certificates = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_CERTIFICATES -.endif -.ifdef REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOSTS - tls_verify_hosts = REMOTE_SMTP_SMARTHOST_TLS_VERIFY_HOST -.endif -.ifdef REMOTE_SMTP_HEADERS_REWRITE - headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE -.endif -.ifdef REMOTE_SMTP_HELO_DATA - helo_data=REMOTE_SMTP_HELO_DATA -.endif -.ifdef TLS_DH_MIN_BITS -tls_dh_min_bits = TLS_DH_MIN_BITS -.endif -.ifdef REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE -tls_certificate = REMOTE_SMTP_SMARTHOST_TLS_CERTIFICATE -.endif -.ifdef REMOTE_SMTP_SMARTHOST_PRIVATEKEY -tls_privatekey = REMOTE_SMTP_SMARTHOST_PRIVATEKEY -.endif -.ifdef REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE - headers_remove = REMOTE_SMTP_TRANSPORTS_HEADERS_REMOVE -.endif -EOF - - # this avoids some error. i cant remember what. todo: - # test it out and document why/if its needed. - # i /etc/exim4/host_local_deny_exceptions <<'EOF' - # mail.fsf.org - # *.posteo.de - # EOF + # This allows for forwarded mail to not get most rcpt checks, especially SPF, + # which would incorrectly get denied. + i /etc/exim4/host_local_deny_exceptions <<'EOF' +mail.fsf.org +*.posteo.de +EOF # cron email from smarthost hosts will automatically be to # USER@FQDN. I redirect that to alerts@, on the smarthosts, but in @@ -2638,11 +2962,28 @@ deny EOF echo|i /etc/exim4/conf.d/router/880_universal_forward + + cat >>/etc/exim4/conf.d/main/000_local <>/etc/exim4/update-exim4.conf.conf <>/etc/myexim4/conf.d/main/000_local <<'EOF' +# this makes it easier to see which exim is doing what +log_file_path = /var/log/exim4/my%s +EOF + + + + cat >/etc/logrotate.d/myexim <<'EOF' +/var/log/exim4/mymain /var/log/exim4/myreject { + daily + missingok + rotate 1000 + delaycompress + notifempty + nocreate +} +/var/log/exim4/mypanic { + size 10M + missingok + rotate 10 + compress + delaycompress + notifempty + nocreate +} +EOF + # If we ever wanted to have a separate spool, # we could do it like this. # cat >>/etc/exim4/conf.d/main/000_local-nn <<'EOF' @@ -2951,6 +3319,9 @@ if [[ -e /nocow ]]; then # without local-fs on exim, we get these kind of errors in paniclog on shutdown: # Failed to create spool file /var/spool/exim4//input//1jCLxz-0008V4-V9-D: Permission denied After=local-fs.target + +[Service] +ExecStartPre=/usr/local/bin/exim-nn-iptables EOF if ! mountpoint -q $sdir; then stopifactive exim4 exim4in @@ -2985,8 +3356,8 @@ elif [[ $uid != 608 ]]; then m usermod -u 608 Debian-exim m groupmod -g 608 Debian-exim m usermod -g 608 Debian-exim - m find / /nocow -path ./var/tmp -prune -o -xdev -uid $uid -execdir chown -h 608 {} + - m find / /nocow -path ./var/tmp -prune -o -xdev -gid $gid -execdir chgrp -h 608 {} + + m find / /nocow -xdev -path ./var/tmp -prune -o -uid $uid -execdir chown -h 608 {} + + m find / /nocow -xdev -path ./var/tmp -prune -o -gid $gid -execdir chgrp -h 608 {} + fi # * start / stop services @@ -2997,6 +3368,13 @@ if $reload; then m systemctl daemon-reload fi +# checking bhost_t is redundant, but could help us catch errors. +if $bhost_t || [[ -e /etc/wireguard/wghole.conf ]]; then + # todo: in mail-setup, we have a static list of backup hosts, not *y + m systemctl --now enable wg-quick@wghole +fi + +sysd-prom-fail-install epanicclean m systemctl --now enable epanicclean case $HOSTNAME in @@ -3012,11 +3390,6 @@ m /a/bin/ds/mail-cert-cron -1 sre mailcert.timer case $HOSTNAME in - bk) - # todo, this should be done in distro-begin - soff systemd-resolved - ln -sf 127.0.0.1-resolv/stub-resolv.conf /etc/resolv.conf - ;;& $MAIL_HOST|bk) m systemctl --now enable mailnn mailnnroute ;;& @@ -3059,18 +3432,28 @@ case $HOSTNAME in $MAIL_HOST) # < 2.1 (eg: in t9), uses a different data format which required manual # migration. dont start if we are running an old version. - if dpkg --compare-versions $(dpkg -s radicale | awk '$1 == "Version:" { print $2 }') ge 2.1; then + if dpkg --compare-versions "$(dpkg -s radicale | awk '$1 == "Version:" { print $2 }')" ge 2.1; then m systemctl --now enable radicale fi ;;& esac +# for debugging dns issues +case $HOSTNAME in + je|bk) + systemctl enable --now logrotate-fast.timer + ;; +esac + # last use of $reload happens in previous block rm -f /var/local/mail-setup-reload case $HOSTNAME in - $MAIL_HOST|bk|je) : ;; + $MAIL_HOST|bk|je|li) + # on li, these are never started, except $vpnser + : + ;; *) soff radicale mailclean.timer dovecot spamassassin $vpnser mailnn clamav-daemon ;; @@ -3102,52 +3485,99 @@ case $HOSTNAME in # note: cronjob "ian" also does some important monitoring # todo: this will sometimes cause an alert because mailtest-check will run # before we have setup network namespace and spamassassin - cat >/etc/cron.d/mailtest <>/etc/cron.d/mailtest <> /etc/exim4/ignore-sent + done + cat >/usr/local/bin/send-test-forward <<'EOF' #!/bin/bash +# we remove from the queue older than 4.3 minutes since we send every 5 minutes. olds=( -$(/sbin/exiqgrep -o 260 -i -r '^(testignore@(iankelling\.org|zroe\.org|expertpathologyreview\.com|amnimal\.ninja|je\.b8\.nz)|jtuttle@gnu\.org)$') +$(/usr/sbin/exiqgrep -o 260 -i -r '^(testignore@(iankelling\.org|zroe\.org|expertpathologyreview\.com|amnimal\.ninja|je\.b8\.nz)|jtuttle@gnu\.org)$') ) if (( ${#olds[@]} )); then - /sbin/exim -Mrm "${olds[@]}" >/dev/null + /usr/sbin/exim -Mrm "${olds[@]}" >/dev/null fi EOF for test_from in ${test_froms[@]}; do + + test_to=${test_tos[0]} + for t in ${test_tos[@]:1}; do + test_to+=", $t" + done + case $test_from in + testignore@expertpathologyreview.com) + test_to=testignore@zroe.org + ;; + esac + cat >>/usr/local/bin/send-test-forward <