# Fail2Ban filter for failed MSSQL Server authentication attempts
[Definition]
failregex = ^\s*Logon\s+Login failed for user '(?:[^']*|.*)'\. [^'\[]+\[CLIENT: \]$
# DEV Notes:
# Tested with SQL Server 2019 on Ubuntu 18.04
#
# Example:
# 2020-02-24 14:48:55.12 Logon Login failed for user 'root'. Reason: Could not find a login matching the name provided. [CLIENT: 127.0.0.1]
#
# Author: RĂ¼diger Olschewsky
#