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File name : dovecot.conf

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

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