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Date: Tue, 24 Feb 2004 12:30:23 -0500
From: Barney Wolff <barney@databus.com>
To: Andrea Venturoli <ml@netfence.it>
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cc: freebsd-net@freebsd.org
Subject: Re: Bad loopback traffic not stopped by ipfw.
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On Tue, Feb 24, 2004 at 05:11:22PM -0500, Andrea Venturoli wrote:
> IMHO opinion wrong packets are arriving from the upstream router (for which it would be useless to ask for a fix),

Your first three rules, before anything else, should be:
allow ip from any to any via lo0
deny log logamount 1000 ip from any to 127.0.0.0/8
deny log logamount 1000 ip from 127.0.0.0/8 to any
then see what ipfw says.  Your ruleset does not block packets from 127
outbound.

-- 
Barney Wolff         http://www.databus.com/bwresume.pdf
I'm available by contract or FT, in the NYC metro area or via the 'Net.