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

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# Fail2Ban configuration file
#
# Author: Steven Hiscocks
#
#
[Definition]
# Option: failregex
# Notes.: regex to match the password failures 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\-.^_]+)
# Multiline regexs should use tag "<SKIPLINES>" to separate lines.
# This allows lines between the matching lines to continue to be
# searched for other failures. This tag can be used multiple times.
# Values: TEXT
#
failregex = ^=INFO REPORT==== ===\nI\(<0\.\d+\.0>:ejabberd_c2s:\d+\) : \([^)]+\) Failed authentication for .+ from IP <HOST> \({{(?:\d+,){3}\d+},\d+}\)$
^(?:\.\d+)? \[info\] <0\.\d+\.\d>@ejabberd_c2s:wait_for_feature_request:\d+ \([^\)]+\) Failed authentication for \S+ from IP <HOST>$
# Option: ignoreregex
# Notes.: regex to ignore. If this regex matches, the line is ignored.
# Values: TEXT
#
ignoreregex =
[Init]
# "maxlines" is number of log lines to buffer for multi-line regex searches
maxlines = 2
# Option: journalmatch
# Notes.: systemd journalctl style match filter for journal based backend
# Values: TEXT
#
journalmatch =