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

# /etc/fail2ban/filter.d/sogo-auth.conf
#
# Fail2Ban configuration file
# By Arnd Brandes
# SOGo
#

[Definition]
# Option: failregex
# Filter Ban in /var/log/sogo/sogo.log
# Note: the error log may contain multiple hosts, whereas the first one 
# is the client and all others are poxys. We match the first one, only

failregex = ^ sogod \[\d+\]: SOGoRootPage Login from '<HOST>' for user '.*' might not have worked( - password policy: \d*  grace: -?\d*  expire: -?\d*  bound: -?\d*)?\s*$

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