From owner-freebsd-doc@FreeBSD.ORG  Fri Feb 24 13:32:17 2006
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Date: Fri, 24 Feb 2006 08:32:15 -0500
From: Artom Lifshitz <artom@sympatico.ca>
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Subject: ipfilter port redirection section needs updating
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It uses the 0/32 special alias in a rdr rule, and, from the ipfilter FAQ 
[http://www.phildev.net/ipf/IPFprob.html#prob17]:

I'm using interface/32, 0/0 or 0/32, and it doesn't work!

These special aliases do not work in IPF rules, or in IPNat rdr rules. 
They only work in IPNat's map and bimap rules.

Thanks!
Artom