kern/161058: enc0 not capturing outgoing IPSEC encrypted transport IPv6 traffic from host

[Matthew Grant]

The following reply was made to PR kern/161058; it has been noted by GNATS.

From: Matthew Grant <matthew.grant at net24.co.nz>
To: bug-followup at FreeBSD.org, matthew.grant at net24.co.nz
Cc:  
Subject: Re: kern/161058: enc0 not capturing outgoing IPSEC encrypted
 transport IPv6 traffic from host
Date: Fri, 30 Sep 2011 10:29:25 +1300

 Hi!
 
 Bug stops outing stateful connection tracking over IPSEC to happen as
 per IPv4 (IPFW):
 
 IPv6 outgoing traffic is only matched as esp, and the packet does not
 appear as per IPv4 as a TCP SYN outgoing on enc0.
 
 IPv4:
 
 
 cmd="ipfw add"
 pif="em0"
 p6if="gif0"
 
 $cmd 00100 allow udp from 203.79.116.183 500 to me 500 in via $pif
 $cmd 00101 allow udp from me 500 to 203.79.116.183 500 out via $pif
 $cmd 00120 allow esp from me to 203.79.116.183 out via $pif
 $cmd 00121 allow esp from 203.79.116.183 to me in via $pif
 
 $cmd 00190 check-state ipsec
 
 $cmd 00200 allow udp from 203.79.116.183 to me 53  in ipsec via $pif
 keep-state
 $cmd 00210 allow tcp from 203.79.116.183 to me 53  in ipsec via $pif
 keep-state
 
 $cmd 00220 allow ip4 from me to 203.79.116.183 out keep-state
 
 $cmd 00290 deny log ip from 203.79.116.183 to me in via $pif
 $cmd 00291 deny log ip from me to 203.79.116.183 out via $pif
 
 
 IPv4:
 $cmd 10100 allow udp from 2001:470:f012:2::2 500 to me6 500 in via $p6if
 $cmd 10101 allow udp from me6 500 to 2001:470:f012:2::2 500 out via
 $p6if
 $cmd 10120 allow esp from me6 to 2001:470:f012:2::2 out via $p6if
 $cmd 10121 allow esp from 2001:470:f012:2::2 to me6 in via $p6if
 
 $cmd 10180 check-state
 $cmd 10200 allow udp from 2001:470:f012:2::2 to me6 53  in ipsec via
 $p6if keep-state
 $cmd 10210 allow tcp from 2001:470:f012:2::2 to me6 53  in ipsec via
 $p6if keep-state
 
 $cmd 10220 allow ip6 from me6 to 2001:470:f012:2::2 out keep-state
 
 $cmd 10290 deny log ip from 2001:470:f012:2::2 to me6 in via $p6if
 $cmd 10291 deny log ip from me6 to 2001:470:f012:2::2 out via $p6if
 
 # Internet name server access
 $cmd 10300 allow udp from any to me6 53 in via $p6if
 $cmd 10301 allow udp from me6 53 to any out via $p6if
 $cmd 10302 allow tcp from any to me6 53 in via $p6if
 $cmd 10303 allow tcp from me6 53 to any out via $p6if