From owner-freebsd-questions@FreeBSD.ORG  Mon Sep 24 21:47:48 2007
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Date: Mon, 24 Sep 2007 22:47:43 +0100
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Cc: Grant Peel <gpeel@thenetnow.com>
Subject: Re: Silly IPFW question.
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On Mon, 24 Sep 2007 17:33:05 -0400
"Grant Peel" <gpeel@thenetnow.com> wrote:

> Hi all,
> 
> I am sorry if this is a no-brainer ....
> 
> Is there anyway to make a rule in IPFW that will match MAC addresses
> instead of IP or port numnbers (and no, I didnt see anything in the
> docs :-))

man ipfw  and search for MAC

Note that you need to set a sysctl for layer 2 - which is also
covered in the man page.