Re: [PATCH] arp_filter patch for 2.4.4 kernel.

From: Matthew Kirkwood (matthew@hairy.beasts.org)
Date: Mon May 07 2001 - 11:35:15 EST


On Sat, 5 May 2001, David S. Miller wrote:

> > It adds the ability to run multiple interfaces on the same subnet,
> > on the same machine, and have the ARPs for each interface be answered
> > based on whether or not the kernel would route a packet from the ARP'd
> > IP out that interface. When used with source-based routing, this
> > makes things work in an intuitive manner.
>
> How difficult is it to compose netfilter rules that do this?

I want this feature precisely /because/ it interferes with
packet filtering.

I sleep better knowing that my packet filters are bound to
specific interfaces (with default DENY everywhere). I like
to know that I can ssh in via the second card on my DB
servers, without worrying about them accepting other traffic
(or performance-vital traffic going over a cheap backup
card).

Matthew.

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