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Date:      Thu, 14 Dec 2000 22:28:39 -0500
From:      Clark Gaylord <cgaylord@vt.edu>
To:        freebsd-net@freebsd.org
Subject:   non-learning bridge for pathological network
Message-ID:  <20001214222838.B84586@cgaylord.async.vt.edu>

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I am interested in creating a pathological lab network with the
following forwarding rules:
 - three networks (A,B,C)
 - packets from A or C are forwarded to B
 - packets from B are forward to both A and C

I was thinking of using BRIDGE+ipfw to create this by hacking
bridge.c so that all dsts are UNKNOWN, then filtering via ipfw by
  deny ip from A to C
  deny ip from C to A

Seems like this would work, but I was wondering what others' thoughts
might be on this approach.  Perhaps BRIDGE could have a (compile-time?)
non-learning flag so that all packets get forwarded as if they are
UNKNOWN.

Oh, btw, I also want tcpdump to work on any of these interfaces. ;-)

Thanks.
Clark
cgaylord@vt.edu


----- End forwarded message -----

-- 
Clark K. Gaylord
Blacksburg, Virginia USA
cgaylord@vt.edu


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