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Guard: watch logs, ban misbehaving addresses in Housecarl

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Files and the journal, patterns with one <IP>, bounties within a window,
bans in a Housecarl ban list with repeat offenders' bans growing; presets
for sshd, jarl, housecarl, steward, bind-xfr, postfix-sasl, dovecot,
nginx-auth and housecarl-drops; guard run/check/test/status/bans/ban/unban;
a Debian package with a sandboxed unit; an end-to-end test with Housecarl.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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abrown38andClaude Opus 5.5 committed 2026-10-22 16:29:37 +01:00
commit d06bf8d531
47 files changed
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testdata/presets/dovecot.txt
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203.0.113.9 imap-login: Disconnected: Connection closed (auth failed, 3 attempts in 12 secs): user=<admin>, method=PLAIN, rip=203.0.113.9, lip=10.0.10.25, TLS, session=<abc>
203.0.113.9 pop3-login: Aborted login (auth failed, 1 attempts in 2 secs): user=<test>, method=PLAIN, rip=203.0.113.9, lip=10.0.10.25, session=<abc>
203.0.113.9 imap-login: Disconnected (auth failed, 1 attempts in 2 secs): user=<a>, rip=8.8.8.8, x>, method=PLAIN, rip=203.0.113.9, lip=10.0.10.25, session=<abc>
- imap-login: Login: user=<adam>, method=PLAIN, rip=10.0.10.20, lip=10.0.10.25, mpid=1234, TLS