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Date:      Tue, 29 May 2001 12:49:04 +0400
From:      Yar Tikhiy <yar@FreeBSD.ORG>
To:        Jonathan Graehl <jonathan@graehl.org>
Cc:        freebsd-net@FreeBSD.ORG
Subject:   Re: Ipfilter nat vs ipfw divert + natd performance
Message-ID:  <20010529124904.A94542@comp.chem.msu.su>
In-Reply-To: <000001c0e7e6$6fb1ee00$6dfeac40@straylight.com>; from jonathan@graehl.org on Mon, May 28, 2001 at 07:24:05PM -0700
References:  <000001c0e7e6$6fb1ee00$6dfeac40@straylight.com>

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Hi Jonathan,

On Mon, May 28, 2001 at 07:24:05PM -0700, Jonathan Graehl wrote:
> I've set up an old Pentium to NAT my little brother's cablemodem using
> ipfw/natd.  Would I see much better performance from ipfilter?  (I
> assume that in-kernel NAT would be faster and have more consistent
> latency than a user process which might not be scheduled for a while?)
> The family does play a game of Tribes now and then, so unpredictable
> 10ms delays would not be fun for them.

I'd suggest you measure the performance parameters (packet delay,
CPU time spent in interrupts etc) for the two cases, and send a small
report here ;-)

-- 
Yar

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