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Date:      Tue, 27 Sep 2005 07:39:41 +0200
From:      Kurt Jaeger <lists@complx.LF.net>
To:        Daniel Pocock <daniel@lvdx.com>
Cc:        freebsd-isp@freebsd.org
Subject:   Filtering (was Re: FreeBSD, quagga (BGP) and 2950 VLANs)
Message-ID:  <20050927053941.GW62233@complx.LF.net>
In-Reply-To: <43386D0D.7000209@lvdx.com>
References:  <432EC4FF.4030706@lvdx.com> <20050919205757.GI62233@complx.LF.net> <432F3013.7090001@keystreams.com> <20050919214618.GJ62233@complx.LF.net> <20050919215605.GK62233@complx.LF.net> <432F4507.4020708@lvdx.com> <432F4A12.9090709@mac.com> <43386D0D.7000209@lvdx.com>

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Hello,

> I'm now starting to look at how to filter packets that I am forwarding, 
> to ensure that none of the people I connect to can use me as their 
> default route (unless I give them permission to do so).  The FreeBSD 
> docs mention three different packet filters - pf, ipfw and ipf.

We use ipfw on Freebsd. It's simple and it works and it's the
native approach. pf is a relevant alternative, because it's
very actively developed from the openbsd community.
ipf: Its very portable on other plattforms, but it looks a bit stale (?).

> Does any of these have specific benefits for a routing device that is 
> forwarding 99.9% of it's traffic to other hosts, or is it just a 
> question of personal preference?  The rules I intend to write are fairly 
> simple, and I don't need any state-based stuff.

If you start anew, maybe pf is the way to go.

-- 
MfG/Best regards, Kurt Jaeger                                  15 years to go !
LF.net GmbH        fon +49 711 90074-23  pi@LF.net  
Ruppmannstr. 27    fax +49 711 90074-33
D-70565 Stuttgart  mob +49 171 3101372



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