kern/145305: [ipfw] ipfw problems, panics, data corruption, ipv6 socket weirdness

[Terrence Koeman]

The following reply was made to PR kern/145305; it has been noted by GNATS.

From: "Terrence Koeman" <root at mediamonks.net>
To: "bug-followup at FreeBSD.org" <bug-followup at FreeBSD.org>
Cc:  
Subject: Re: kern/145305: [ipfw] ipfw problems, panics, data corruption, ipv6 socket weirdness
Date: Wed, 30 Jun 2010 12:35:38 +0200

 Example output of 'lsof -i 6 -nP':
 
 CGServer 1096 root  158u  IPv6 0xffffff001087f6e0      0t0  TCP [2001:610:x=
 x:xxx:xxx:xxx:117:200]:18187->[::213.136.12.237]:25 (SYN_SENT)
 <hundreds more>
 
 These are accompanied by entries in /var/log/security like so:
 
 Jun 30 12:12:28 adinava kernel: ipfw: 65529 Accept TCP 1.23.2.0:18187 213.1=
 36.12.235:25 out via bce0
 
 Obviously these will hang in SYN_SENT until they time out because the SYN p=
 acket with source 1.23.2.0 gets dropped at the border (and there wouldn't b=
 e a return route anyway).
 
 I'm assuming the ipv6 '2001:610:xx:xxx:xxx:xxx:117:200' ends up being ipv4 =
 '1.23.2.0' due to some conversion error.
 
 -- 
 Regards,
 T. Koeman, MTh/BSc/BPsy; Technical Monk
 
 MediaMonks B.V. (www.mediamonks.com)
 Please quote all replies in correspondence.