ENH: asterisk filter to support syslog format

ChangeLog

@@ -76,6 +76,7 @@ configuration before relying on it.
      - Requires Python 2.7+
 
 - Enhancements
+   * Asterisk now supports syslog format
    * Jail names increased to 26 characters and iptables prefix reduced
      from fail2ban- to f2b- as suggested by buanzo in gh-462.
    * Multiline filter for sendmail-spam. Close gh-418

config/filter.d/asterisk.conf

@@ -1,24 +1,39 @@
 # 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 = (?:\[\d+\])
 
 # 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]+")?(,ACLName="\w+")?$
-            ^\[\]\s*WARNING%(__pid_re)s:?(?:\[C-[\da-f]*\])? Ext\. s: "Rejecting unknown SIP connection from <HOST>"$
+log_prefix= (?:NOTICE|SECURITY)%(__pid_re)s:?(?:\[C-[\da-f]*\])? \S+:\d*( in \w+:)?
+
+failregex = ^(%(__prefix_line)s|\[\]\s*)%(log_prefix)s 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)$
+            ^(%(__prefix_line)s|\[\]\s*)%(log_prefix)s Call from '[^']*' \(<HOST>:\d+\) to extension '\d+' rejected because extension not found in context 'default'\.$
+            ^(%(__prefix_line)s|\[\]\s*)%(log_prefix)s Host <HOST> failed to authenticate as '[^']*'$
+            ^(%(__prefix_line)s|\[\]\s*)%(log_prefix)s No registration for peer '[^']*' \(from <HOST>\)$
+            ^(%(__prefix_line)s|\[\]\s*)%(log_prefix)s Host <HOST> failed MD5 authentication for '[^']*' \([^)]+\)$
+            ^(%(__prefix_line)s|\[\]\s*)%(log_prefix)s Failed to authenticate (user|device) [^@]+@<HOST>\S*$
+            ^(%(__prefix_line)s|\[\]\s*)%(log_prefix)s (?:handle_request_subscribe: )?Sending fake auth rejection for (device|user) \d*<sip:[^@]+@<HOST>>;tag=\w+\S*$
+            ^(%(__prefix_line)s|\[\]\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]+")?(,ACLName="\w+")?$
+            ^(%(__prefix_line)s|\[\]\s*WARNING%(__pid_re)s:?(?:\[C-[\da-f]*\])? )Ext\. s: "Rejecting unknown SIP connection from <HOST>"$
 
 ignoreregex =
 
 
-# Author: Xavier Devlamynck
+# 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

fail2ban/tests/files/logs/asterisk

@@ -45,3 +45,7 @@
 
 # failJSON: { "time": "2013-11-11T14:33:38", "match": true , "host": "192.168.55.152" }
 [2013-11-11 14:33:38] WARNING[6756][C-0000001d] Ext. s: "Rejecting unknown SIP connection from 192.168.55.152"
+
+
+# failJSON: { "time": "2004-11-04T18:30:40", "match": true , "host": "192.168.200.100" }
+Nov 4 18:30:40 localhost asterisk[32229]: NOTICE[32257]: chan_sip.c:23417 in handle_request_register: Registration from '<sip:301@example.com>' failed for '192.168.200.100:36998' - Wrong password