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Date:      Sat, 19 Feb 2000 12:17:43 +0200
From:      Ruslan Ermilov <ru@ucb.crimea.ua>
Cc:        William Wong <willwong@anime.ca>, freebsd-questions@FreeBSD.ORG
Subject:   Re: ipfw and natd
Message-ID:  <20000219121743.B96238@relay.ucb.crimea.ua>
In-Reply-To: <20000218150000.D4423@hades.hell.gr>; from Giorgos Keramidas on Fri, Feb 18, 2000 at 03:00:00PM %2B0200
References:  <006601bf7779$59342140$0300a8c0@anime.ca> <20000218150000.D4423@hades.hell.gr>

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On Fri, Feb 18, 2000 at 03:00:00PM +0200, Giorgos Keramidas wrote:
> On Tue, Feb 15, 2000 at 12:56:05AM -0500, William Wong wrote:
> > 
> > A curiosity question.
> > 
> > Though I think it doesn't make much difference I think in the end...
> > 
> > Should ipfw "deny/allow" rules be set before or after the "divert to
> > natd" rule?
> >
> > I've been using the latter and everything seems to work right.
> 
> Ipfw will use the action of the *first* matching rule.
> 
Except the `tee', `count', and `skipto' rules, of course.
This is all desribed in ipfw(8) manpage.

> A rule like:
> 
> 	deny ip from any to any
> 
> will match with any IP datagram.  Having the rules:
> 
> 	deny ip from any to any
> 	allow tcp from any to $myaddr 25
> 
> will make the second rule pretty much redundant, since ALL tcp packets
> will match witht he first rule too and be dropped.
> 
> -- 
> Giorgos Keramidas, < keramida @ ceid . upatras . gr >
> For my public PGP key: finger keramida@diogenis.ceid.upatras.gr
> PGP fingerprint, phone and address in the headers of this message.
> 
> 
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-- 
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