Lire::Firewall::IpfilterDlfConverter - convert ipf (ipmon) logs to firewall DLF

Lire::Firewall::IpfilterDlfConverter converts Ipfilter logs into firewall DLF format. Input for this converter is the standard ipf syslog log file as produced by ipmon. IP Filter is shipped with FreeBSD, OpenBSD (up to 2.9) and some other OS's.

A ipfilter logfile which looks like

 Oct 30 07:42:29 rolle ipmon[16747]: 07:42:28.585962              ie0 @0:9
  b 192.168.48.1,45085 -> 192.168.48.2,22 PR tcp len 20 64 -S OUT
 Oct 30 07:40:24 rolle ipmon[16747]: 07:40:23.631307              ep1 @0:6
  b 192.168.26.5,113 -> 192.168.26.1,3717 PR tcp len 20 40 -AR OUT
 Oct 30 07:42:29 rolle ipmon[16747]: 07:42:28.585962              ie0 @0:9
  b 192.168.48.1,45085 -> 192.168.48.2,22 PR tcp len 20 64 -S OUT
 Oct 30 07:44:11 rolle ipmon[16747]: 07:44:10.605416 2x              ep1 @0:15
  b 192.168.26.1,138 -> 192.168.26.255,138 PR udp len 20 257  IN
 Oct 30 07:44:34 rolle ipmon[16747]: 07:44:33.891869              ie0 @0:10
  b 192.168.48.1,23406 -> 192.168.48.2,22 PR tcp len 20 64 -S OUT
 Oct 30 07:49:13 rolle ipmon[16747]: 07:49:12.554420              ep1 @0:15
  b 210.132.100.117 -> 192.168.26.5 PR icmp len 20 56 icmp 3/3 for
  192.168.26.5,61915 - 210.132.100.117,53 PR udp len 20 23040 IN
 Oct 30 07:50:23 rolle ipmon[16747]: 07:50:22.908107              ep1 @0:15
  b 210.132.100.117 -> 192.168.26.5 PR icmp len 20 56 icmp 3/3 for
  192.168.26.5,4480 - 210.132.100.117,53 PR udp len 20 19712 IN
 Oct 30 07:56:11 rolle ipmon[16747]: 07:56:11.113029 2x              ep1 @0:15
  b 192.168.26.1,138 -> 192.168.26.255,138 PR udp len 20 257  IN

(that's: .... 'PR' protocol 'len' length_of_ip_headers_saved packetlength direction) will get converted to something like

 994398737 denied igmp 100.187.115.1 - ep1 LIRE_NOTAVAIL 224.0.0.2 - 56
 994398861 denied igmp 100.187.115.1 - ep1 LIRE_NOTAVAIL 224.0.0.1 - 56
 994398862 denied igmp 100.187.115.1 - ep1 LIRE_NOTAVAIL 224.0.0.2 - 56
 994406849 denied udp 192.168.26.4 137 ie0 LIRE_NOTAVAIL 192.168.26.255 137 116
 994406850 denied udp 192.168.26.4 137 ie0 LIRE_NOTAVAIL 192.168.26.255 137 116
 994406866 denied udp 192.168.26.4 137 ie0 LIRE_NOTAVAIL 192.168.26.255 137 98

ipl(4) for description of log structure.

The ipmon.c source (e.g. on http://www.openbsd.org/cgi-bin/cvsweb/~checkout~/src/usr.sbin/ipmon/Attic/ipmon.c?rev=1.27&content-type=text/plain&hideattic=0 for the specification) of the log syntax.

The IP Filter webpage on http://coombs.anu.edu.au/~avalon/ip-filter.html

Joost van Baal <joostvb@logreport.org>, Wessel Dankers <wsl@logreport.org>

$Id: IpfilterDlfConverter.pm,v 1.5 2004/07/22 13:43:46 flacoste Exp $

Copyright (C) 2001-2003 Stichting LogReport Foundation LogReport@LogReport.org

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