Serreau Jovann 8c6b485acd feat: ajout Fail2ban pour protection Dovecot IMAPS/POP3S (993/995)
Configuration :
- docker/fail2ban/jail.local : jail dovecot uniquement sur ports 993,995,
  bantime 1h, findtime 10min, maxretry 5 tentatives
- docker/fail2ban/filter.d/dovecot.conf : regex pour auth failed,
  disconnected, aborted login (IMAP + POP3)

Docker :
- Image crazymax/fail2ban, network_mode host (accès iptables),
  cap_add NET_ADMIN + NET_RAW pour manipuler les règles firewall
- Volume dovecot-logs partagé en lecture seule pour lire les logs Dovecot
- Volume fail2ban-data pour persister la DB des bans

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-04-03 14:42:11 +02:00
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