Re: ARP's frustrating behavior

From: Roland Kuhn (rkuhn@e18.physik.tu-muenchen.de)
Date: Wed Aug 08 2001 - 06:57:10 EST


Hi!

On Tue, 7 Aug 2001, Ben Greear wrote:

> Stuart Duncan wrote:
> >
> > Hi,
> >
> > I'm noticing on a machine with dual NICs that they they all seem to answer
> > ARP queries, even if the request is not directed to their IP. Here's an
> > example:
> >
>
> Evidently, this is considered a feature. However, to turn it off:
> echo 1 > /proc/sys/net/ipv4/conf/all/arp_filter

This doesn't work for me, which is quite annoying: the machine answers arp
for 192.168.1.254 (its IP on the private net on eth1) when arping'ed on
the official side (eth0). Networks are physically separated, the official
side is inside a big network which routes 192.168 internally, so this is
really bad. If anyone could fix it I would be pleased...

Ciao,
                                        Roland

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