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# Fail2Ban filter Dovecot authentication and pop3/imap server
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#
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[INCLUDES]
before = common.conf
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[Definition]
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_daemon = (auth|dovecot(-auth)?|auth-worker)
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failregex = ^%(__prefix_line)s(pam_unix(\(dovecot:auth\))?:)?\s+authentication failure; logname=\S* uid=\S* euid=\S* tty=dovecot ruser=\S* rhost=<HOST>(\s+user=\S*)?\s*$
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^%(__prefix_line)s(pop3|imap)-login: (Info: )?(Aborted login|Disconnected)(: Inactivity)? \(((auth failed, \d+ attempts)( in \d+ secs)?|tried to use (disabled|disallowed) \S+ auth)\):( user=<\S*>,)?( method=\S+,)? rip=<HOST>(, lip=(\d{1,3}\.){3}\d{1,3})?(, TLS( handshaking(: SSL_accept\(\) failed: error:[\dA-F]+:SSL routines:[TLS\d]+_GET_CLIENT_HELLO:unknown protocol)?)?(: Disconnected)?)?(, session=<\S+>)?\s*$
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^%(__prefix_line)s(Info|dovecot: auth\(default\)): pam\(\S+,<HOST>\): pam_authenticate\(\) failed: (User not known to the underlying authentication module: \d+ Time\(s\)|Authentication failure \(password mismatch\?\))\s*$
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ignoreregex =
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[Init]
journalmatch = _SYSTEMD_UNIT=dovecot.service
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# DEV Notes:
# * the first regex is essentially a copy of pam-generic.conf
# * Probably doesn't do dovecot sql/ldap backends properly
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# * Removed the 'no auth attempts' log lines from the matches because produces
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# lots of false positives on misconfigured MTAs making regexp unusable
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#
# Author: Martin Waschbuesch
# Daniel Black (rewrote with begin and end anchors)
