fail2ban/config/filter.d/common.conf

# Generic configuration items (to be used as interpolations) in other
# filters  or actions configurations
#

[INCLUDES]

# Load customizations if any available
after = common.local


[DEFAULT]

# Daemon definition is to be specialized (if needed) in .conf file
_daemon = \S*

#
# Shortcuts for easier comprehension of the failregex
#
# PID.
# EXAMPLES: [123]
__pid_re = (?:\[\d+\])

# Daemon name (with optional source_file:line or whatever)
# EXAMPLES: pam_rhosts_auth, [sshd], pop(pam_unix)
__daemon_re = [\[\(]?%(_daemon)s(?:\(\S+\))?[\]\)]?:?

# extra daemon info
# EXAMPLE: [ID 800047 auth.info]
__daemon_extra_re = \[ID \d+ \S+\]

# Combinations of daemon name and PID
# EXAMPLES: sshd[31607], pop(pam_unix)[4920]
__daemon_combs_re = (?:%(__pid_re)s?:\s+%(__daemon_re)s|%(__daemon_re)s%(__pid_re)s?:?)

# Some messages have a kernel prefix with a timestamp
# EXAMPLES: kernel: [769570.846956]
__kernel_prefix = kernel: \[ *\d+\.\d+\]

__hostname = \S+

# A MD5 hex
# EXAMPLES: 07:06:27:55:b0:e3:0c:3c:5a:28:2d:7c:7e:4c:77:5f
__md5hex = (?:[\da-f]{2}:){15}[\da-f]{2}

# bsdverbose is where syslogd is started with -v or -vv and results in <4.3> or
# <auth.info> appearing before the host as per testcases/files/logs/bsd/*.
__bsd_syslog_verbose = <[^.]+\.[^.]+>

__vserver = @vserver_\S+

__date_ambit = (?:\[\])

# Common line prefixes (beginnings) which could be used in filters
#
#      [bsdverbose]? [hostname] [vserver tag] daemon_id spaces
#
# This can be optional (for instance if we match named native log files)
__prefix_line = %(__date_ambit)s?\s*(?:%(__bsd_syslog_verbose)s\s+)?(?:%(__hostname)s\s+)?(?:%(__kernel_prefix)s\s+)?(?:%(__vserver)s\s+)?(?:%(__daemon_combs_re)s\s+)?(?:%(__daemon_extra_re)s\s+)?

# PAM authentication mechanism check for failures, e.g.: pam_unix, pam_sss,
# pam_ldap
__pam_auth = pam_unix

# Author: Yaroslav Halchenko