# Fail2Ban filter for sendmail authentication failures # [INCLUDES] before = common.conf [Definition] _daemon = (?:sendmail|sm-(?:mta|acceptingconnections)) failregex = ^%(__prefix_line)s\w{14}: (\S+ )?\[\]( \(may be forged\))?: possible SMTP attack: command=AUTH, count=\d+$ ignoreregex = journalmatch = _SYSTEMD_UNIT=sendmail.service # DEV Notes: # # Author: Daniel Black