From owner-freebsd-ipfw@FreeBSD.ORG  Wed Feb 15 22:50:57 2006
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Date: Thu, 16 Feb 2006 11:50:47 +1300
From: Barry Murphy <barry@unix.co.nz>
To: freebsd-ipfw@freebsd.org
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Subject: ipfw with fw.one_pass doesnt work when specifying interface
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Hey guys,

I've found "/sbin/sysctl net.inet.ip.fw.one_pass=0" not to work on rules
that have the "in via IF" specified.

Replicated:
ipfw add 00082 count log ip from 60.234.68.88/29 to any in via em1
ipfw add 00082 count log ip from any to 60.234.68.88/29 out via em1

ipfw add 01082 count log ip from 60.234.68.88/29 to any in via em1
ipfw add 01082 count log ip from any to 60.234.68.88/29 out via em1

Rule 82 picks up traffic but rule 1082 gets none.

It works fine if I use:
ipfw add 00082 count ip from any to 60.234.68.88/29 in
ipfw add 00082 count ip from 60.234.68.88/29 to any out

ipfw add 01082 count ip from any to 60.234.68.88/29 in
ipfw add 01082 count ip from 60.234.68.88/29 to any out

However I need to specify an interface (em1) as I'll be adding a FWD rule to
a transparent proxy and want it to count the traffic to the proxy too.

Any ideas?

Cheers
Barry