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From: Mel <fbsd.questions@rachie.is-a-geek.net>
To: freebsd-questions@freebsd.org
Date: Thu, 27 Sep 2007 11:14:22 +0200
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Subject: Re: PF & NAT, how to forward GRE?
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On Thursday 27 September 2007 02:47:14 Paul Fraser wrote:

> I'd like to forward all incoming GRE traffic on the WAN link to a system
> on the wired network. Could anyone advise how?

I take it you mean gre(4), which defines two IP protocols. So your rules will 
need to include proto gre or proto mobile to identify the traffic. Something 
like:
nat on $wan_if proto gre from $int_if:network to any -> ($wan_if)

-- 
Mel