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# Fail2Ban filter for asterisk authentication failures#[Definition]__pid_re = (?:\[\d+\])# All Asterisk log messages begin like this:log_prefix= \[\]\s*(?:NOTICE|SECURITY)%(__pid_re)s:?(?:\[C-[\da-f]*\])? \S+:\d*failregex = ^%(log_prefix)s Registration from '[^']*' failed for '<HOST>(:\d+)?' - (Wrong password|No matching peer found|Username/auth name mismatch|Device does not match ACL|Peer is not supposed to register|ACL error \(permit/deny\)|Not a local domain)$^%(log_prefix)s Call from '[^']*' \(<HOST>:\d+\) to extension '\d+' rejected because extension not found in context 'default'\.$^%(log_prefix)s Host <HOST> failed to authenticate as '[^']*'$^%(log_prefix)s No registration for peer '[^']*' \(from <HOST>\)$^%(log_prefix)s Host <HOST> failed MD5 authentication for '[^']*' \([^)]+\)$^%(log_prefix)s Failed to authenticate (user|device) [^@]+@<HOST>\S*$^%(log_prefix)s (?:handle_request_subscribe: )?Sending fake auth rejection for (device|user) \d*<sip:[^@]+@<HOST>>;tag=\w+\S*$^%(log_prefix)s SecurityEvent="(FailedACL|InvalidAccountID|ChallengeResponseFailed|InvalidPassword)",EventTV="[\d-]+",Severity="[\w]+",Service="[\w]+",EventVersion="\d+",AccountID="\d+",SessionID="0x[\da-f]+",LocalAddress="IPV[46]/(UD|TC)P/[\da-fA-F:.]+/\d+",RemoteAddress="IPV[46]/(UD|TC)P/<HOST>/\d+"(,Challenge="\w+",ReceivedChallenge="\w+")?(,ReceivedHash="[\da-f]+")?$^\[\]\s*WARNING%(__pid_re)s:?(?:\[C-[\da-f]*\])? Ext\. s: "Rejecting unknown SIP connection from <HOST>"$ignoreregex =# Author: Xavier Devlamynck