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To: fbsd_user@a1poweruser.com
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From: Dan Pelleg <daniel+bsd@pelleg.org>
Date: Wed, 14 Jan 2004 09:47:17 -0500
In-Reply-To: <MIEPLLIBMLEEABPDBIEGCEEJFEAA.fbsd_user@a1poweruser.com> (fbsd
 user's message of "Tue, 13 Jan 2004 21:39:43 -0500")
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cc: "freebsd-questions@FreeBSD. ORG" <freebsd-questions@FreeBSD.ORG>
Subject: Re: IPFW 'keep state' & 'limit'
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"fbsd_user" <fbsd_user@a1poweruser.com> writes:

> Reading the man page on IPFW rule syntax, I get the impression that
> the 'limit' option uses the stateful dynamic rules table. But it's
> unclear whether 'keep state' and limit can be used on the same rule,
> or if the limit option performs the 'keep state' function in
> addition to the limit function.
>
> So as an example
>
> $cmd 00390 allow tcp from any to any 22 in via dc0 setup keep-state
> limit src-addr 3
>
> will this work?
>

limit implies keep-state, and you should really specify one or the
other. If you specify both, ipfw won't complain, but ipfw2 will. So it's
best to not do that.

-- 

  Dan Pelleg