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Directory :  /etc/fail2ban/filter.d/

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Current File : /etc/fail2ban/filter.d/asterisk.conf
# Fail2Ban filter for asterisk authentication failures
#

[INCLUDES]

# Read common prefixes. If any customizations available -- read them from
# common.local
before = common.conf

[Definition]

_daemon = asterisk

__pid_re = (?:\s*\[\d+\])

iso8601 = \d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d+[+-]\d{4}

# All Asterisk log messages begin like this:
log_prefix= (?:NOTICE|SECURITY|WARNING)%(__pid_re)s:?(?:\[C-[\da-f]*\])?:? [^:]+:\d*(?:(?: in)? [^:]+:)?

prefregex = ^%(__prefix_line)s%(log_prefix)s <F-CONTENT>.+</F-CONTENT>$

failregex = ^Registration from '[^']*' failed for '<HOST>(:\d+)?' - (?:Wrong password|Username/auth name mismatch|No matching peer found|Not a local domain|Device does not match ACL|Peer is not supposed to register|ACL error \(permit/deny\)|Not a local domain)$
            ^Call from '[^']*' \(<HOST>:\d+\) to extension '[^']*' rejected because extension not found in context
            ^(?:Host )?<HOST> (?:failed (?:to authenticate\b|MD5 authentication\b)|tried to authenticate with nonexistent user\b)
            ^No registration for peer '[^']*' \(from <HOST>\)$
            ^hacking attempt detected '<HOST>'$
            ^SecurityEvent="(?:FailedACL|InvalidAccountID|ChallengeResponseFailed|InvalidPassword)"(?:(?:,(?!RemoteAddress=)\w+="[^"]*")*|.*?),RemoteAddress="IPV[46]/[^/"]+/<HOST>/\d+"(?:,(?!RemoteAddress=)\w+="[^"]*")*$
            ^"Rejecting unknown SIP connection from <HOST>(?::\d+)?"$
            ^Request (?:'[^']*' )?from '(?:[^']*|.*?)' failed for '<HOST>(?::\d+)?'\s\(callid: [^\)]*\) - (?:No matching endpoint found|Not match Endpoint(?: Contact)? ACL|(?:Failed|Error) to authenticate)\s*$

# FreePBX (todo: make optional in v.0.10):
#            ^(%(__prefix_line)s|\[\]\s*WARNING%(__pid_re)s:?(?:\[C-[\da-f]*\])? )[^:]+: Friendly Scanner from <HOST>$

ignoreregex =

datepattern = {^LN-BEG}

# Author: Xavier Devlamynck / Daniel Black
#
# General log format - main/logger.c:ast_log
# Address format - ast_sockaddr_stringify
#
# First regex: channels/chan_sip.c
#
# main/logger.c:ast_log_vsyslog - "in {functionname}:" only occurs in syslog

journalmatch = _SYSTEMD_UNIT=asterisk.service


[lt_journal]

# asterisk can log timestamp if logs into systemd-journal (optional part matching this timestamp, gh-2383):
__extra_timestamp = (?:\[[^\]]+\]\s+)?
__prefix_line = %(known/__prefix_line)s%(__extra_timestamp)s
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