fail2ban/config/filter.d/common.conf

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

[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+


# 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 = (<[^.]+\.[^.]+>)

#
# 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 = \s*%(__bsd_syslog_verbose)s?\s*(?:%(__hostname)s )?(?:%(__kernel_prefix)s )?(?:@vserver_\S+ )?%(__daemon_combs_re)s?\s%(__daemon_extra_re)s?\s*