fail2ban/config/filter.d/roundcube-auth.conf

# Fail2Ban configuration file for roundcube web server
#
# Author: Teodor Micu & Yaroslav Halchenko & terence namusonge
#
#

[INCLUDES]

before = common.conf

[Definition]

# Option:  failregex
# Notes.:  regex to match the password failure messages in the logfile. The
#          host must be matched by a group named "host". The tag "<HOST>" can
#          be used for standard IP/hostname matching and is only an alias for
#          (?:::f{4,6}:)?(?P<host>[\w\-.^_]+)
# Values:  TEXT
#
failregex = ^\s*(\[(\s\+[0-9]{4})?\])?(%(__hostname)s roundcube: IMAP Error)?: (FAILED login|Login failed) for .*? from <HOST>(\. AUTHENTICATE .*)?\s*$

# Option:  ignoreregex
# Notes.:  regex to ignore. If this regex matches, the line is ignored.
# Values:  TEXT
#
ignoreregex =