From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jason Opperisano <opie@817west.com>
Subject: Re: iptables performance
Date: Wed, 25 May 2005 17:25:24 -0400
Message-ID: <20050525212523.GA18093@bender.817west.com>
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On Wed, May 25, 2005 at 07:20:53PM +0000, Martin Schi=F8tz wrote:
> Hi=20
>=20
> I'm planning to set up a bridge running iptables on an uplink of a lot
> of internet user. The uplink is on maximum at about 30 mbit/s. There
> are about 1800 * /29 ip nets - some /29 nets needs to be stopped be
> the bridge and some can pass. I'm wondering about the performance of
> iptables when having 1800*2 rules worst case (PREROUTING rules on src
> and dst nets).

sounds like a job for ipset [1].  if you have 1800 nets that fall into 2
categories, you'd have 2 rules, 1 for set 1 and 1 for set 2.  depending
how the nets break down on CIDR boundaries, you could auto-summarize the
nets that have the same rules to be applied to them.

-j

[1] - http://people.netfilter.org/kadlec/ipset/

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