fail2ban/config/filter.d/haproxy-http-auth.conf

# Fail2Ban filter configuration file to match failed login attempts to
# HAProxy HTTP Authentication protected servers.
#
# PLEASE NOTE - When a user first hits the HTTP Auth a 401 is returned by the server
# which prompts their browser to ask for login details.
# This initial 401 is logged by HAProxy.
# In other words, even successful logins will have at least 1 fail regex match.
# Please keep this in mind when setting findtime and maxretry for jails.
#
# Author: Jordan Moeser
#

[INCLUDES]

# Read common prefixes. If any customizations available -- read them from
# common.local
before = common.conf


[Definition]

_daemon = haproxy

# 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\-.^_]+)
# Values:  TEXT
#
failregex = ^%(__prefix_line)s<HOST>(?::\d+)?\s+.*<NOSRV> -1/-1/-1/-1/\+*\d* 401

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