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Date: Thu, 08 Jun 2006 08:40:25 +0400
From: "Andrey V. Elsukov" <bu7cher@yandex.ru>
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To: mufalani <mufalani@oi.com.br>
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Cc: freebsd-ipfw@freebsd.org
Subject: Re: ipfw + nat
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mufalani wrote:
> How to redirect requisitions at 80?s port (200.X.X.X:80) 
 > to address (192.x.x.x:80) with nat and ipfw?

You can try following:
# natd -alias_address 200.X.X.X -redirect_port tcp 192.x.x.x:80 80
# ipfw add divert natd tcp from any to 200.X.X.X in recv $ExtIf
# ipfw add divert natd tcp from 192.x.x.x 80 to any out xmit $ExtIf

$ExtIf - external interface.

-- 
WBR, Andrey V. Elsukov