From owner-freebsd-stable@FreeBSD.ORG  Fri Dec 22 02:59:48 2006
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Date: Fri, 22 Dec 2006 13:45:14 +1100 (EST)
From: Ian Smith <smithi@nimnet.asn.au>
To: Scott Ullrich <sullrich@gmail.com>
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Cc: stable@freebsd.org,
	=?ISO-8859-1?Q?V=E1clav_Haisman?= <V.Haisman@sh.cvut.cz>,
	Kevin Downey <redchin@gmail.com>
Subject: Re: Duplicate IPFW rules
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On Thu, 21 Dec 2006, Scott Ullrich wrote:

 > On 12/21/06, Václav Haisman <V.Haisman@sh.cvut.cz> wrote:
 > > Oh, I did not realise this use. Hmm...still, I thought that this is what
 > > tables are for :)
 > 
 > Yep, thats another usage for tables.  But tables have not been around
 > for very long either.  Considering that I have used IPFW since FreeBSD
 > version 2 or something or another these fancy features have not always
 > been around :)

Perhaps worth noting that on FreeBSD 2 (and iirc, 3) 'ipfw delete $rule'
only deleted the first of any set of same-numbered rules, ie you had to
issue multiple delete commands.  This behaviour changed somewhere in 4.x
to a single delete command removing all same-numbered rules; I had to
modify several scripts at the time to accomodate that (sensible) change.

Cheers, Ian