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# Fail2Ban filter Dovecot authentication and pop3/imap server
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#
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[INCLUDES]
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before = common.conf
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[Definition]
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_auth_worker = (?:dovecot: )?auth(?:-worker)?
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_daemon = (?:dovecot(?:-auth)?|auth)
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prefregex = ^%(__prefix_line)s(?:%(_auth_worker)s(?:\([^\)]+\))?: )?(?:%(__pam_auth)s(?:\(dovecot:auth\))?: |(?:pop3|imap)-login: )?(?:Info: )?<F-CONTENT>.+</F-CONTENT>$
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failregex = ^authentication failure; logname=<F-ALT_USER1>\S*</F-ALT_USER1> uid=\S* euid=\S* tty=dovecot ruser=<F-USER>\S*</F-USER> rhost=<HOST>(?:\s+user=<F-ALT_USER>\S*</F-ALT_USER>)?\s*$
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^(?:Aborted login|Disconnected)(?::(?: [^ \(]+)+)? \((?:auth failed, \d+ attempts(?: in \d+ secs)?|tried to use (?:disabled|disallowed) \S+ auth|proxy dest auth failed)\):(?: user=<<F-USER>[^>]*</F-USER>>,)?(?: method=\S+,)? rip=<HOST>(?:[^>]*(?:, session=<\S+>)?)\s*$
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^pam\(\S+,<HOST>(?:,\S*)?\): pam_authenticate\(\) failed: (?:User not known to the underlying authentication module: \d+ Time\(s\)|Authentication failure \(password mismatch\?\)|Permission denied)\s*$
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^[a-z\-]{3,15}\(\S*,<HOST>(?:,\S*)?\): (?:unknown user|invalid credentials|Password mismatch)\s*$
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<mdre-<mode>>
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mdre-aggressive = ^(?:Aborted login|Disconnected)(?::(?: [^ \(]+)+)? \((?:no auth attempts|disconnected before auth was ready,|client didn't finish \S+ auth,)(?: (?:in|waited) \d+ secs)?\):(?: user=<[^>]*>,)?(?: method=\S+,)? rip=<HOST>(?:[^>]*(?:, session=<\S+>)?)\s*$
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mdre-normal =
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# Parameter `mode` - `normal` or `aggressive`.
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# Aggressive mode can be used to match log-entries like:
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# 'no auth attempts', 'disconnected before auth was ready', 'client didn't finish SASL auth'.
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# Note it may produce lots of false positives on misconfigured MTAs.
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# Ex.:
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# filter = dovecot[mode=aggressive]
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mode = normal
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ignoreregex =
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journalmatch = _SYSTEMD_UNIT=dovecot.service
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datepattern = {^LN-BEG}TAI64N
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{^LN-BEG}
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# DEV Notes:
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# * the first regex is essentially a copy of pam-generic.conf
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# * Probably doesn't do dovecot sql/ldap backends properly (resolved in edit 21/03/2016)
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#
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# Author: Martin Waschbuesch
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# Daniel Black (rewrote with begin and end anchors)
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# Martin O'Neal (added LDAP authentication failure regex)
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# Sergey G. Brester aka sebres (reviewed, optimized, IPv6-compatibility)
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