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Date:      Thu, 17 Aug 2000 10:16:15 -0600 (MDT)
From:      Nate Williams <nate@yogotech.com>
To:        "John" <john@digitalinet.com>
Cc:        "Nate Williams" <nate@yogotech.com>, "Warner Losh" <imp@village.org>, "Mike Silbersack" <silby@silby.com>, "David May" <David_May@allsolutions.com.au>, <freebsd-security@FreeBSD.ORG>
Subject:   Re: [Q] why does my firewall degrade Web performance? 
Message-ID:  <200008171616.KAA23260@nomad.yogotech.com>
In-Reply-To: <000b01c00866$5ca6de20$03030303@john>
References:  <Pine.BSF.4.21.0008161825580.14500-100000@achilles.silby.com> <200008170516.XAA09705@harmony.village.org> <200008171558.JAA23163@nomad.yogotech.com> <000b01c00866$5ca6de20$03030303@john>

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> I recommend making sure the nic's on the machine are performing fine.

For what it's worth, I'm using one of the *really* crappy cards (3c509)
on my 486/66, and it's still working fine.

IPFW is a *very* effecient packet filtering implementation, so either
the firewall rules are implemented poorly (you can optimize them rather
easily by doing fast-path guesses), or something else is wrong.

> I also recommend you benchmark your webserver from inside the firewall then
> from outside.
> If you can't figure anything out I recommend you try using ipfilter instead
> of ipfw.

ipfilter is much more resource hungry than ipfw.


Nate


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