fail2ban을 dovecot에 적용하기

[출처 : http://wiki.dovecot.org/ ]

1.필터 생성
/etc/fail2ban/filter.d/dovecot-pop3imap.conf

[Definition]
failregex = (?: pop3-login|imap-login): (?:Authentication failure|Aborted login \(auth failed|Aborted login \(tried to use disabled|Disconnected \(auth failed).*rip=(?P<host>\S*),.*
ignoreregex =

2.설정 파일에 규칙 추가

/etc/fail2ban/jail.conf

[dovecot-pop3imap]
enabled = true
filter = dovecot-pop3imap
action = iptables-multiport[name=dovecot-pop3imap, port="pop3,imap", protocol=tcp]
logpath = /var/log/maillog
maxretry = 20
findtime = 1200
bantime = 1200