Re: ARP request/reply extrange behavior

[Diego Woitasen <diegows@linux.org.ar>]

Alberto, la verdad que estaba buscando alguna respuesta que me 
justificara este comportamiento. A mi criterio me parece que esto no 
deberia ser asi, por lo tanto me gustaria que alguien me diga por que 
esto es asi.

Alberto Bertogli wrote:
> On Mon, Jun 23, 2003 at 05:01:40PM -0300, Diego Woitasen wrote:
>
> > Why the kernel answer ARP request when these enters by a different
> > interface from which has the ip in question?
> >
> > For example:
> >
> > lo:0 = 10.10.10.10
> > eth0 = 10.10.10.11
> >
> > If an ARP request for 10.10.10.10 arrive at eth0, the kernel send a
> > reply, but this address is not attached to eth0.
> >
> > Is this a bug or is intentional?
>
>
> It's intentional behaviour.
>
> You can disable it if you want, take a look at
> Documentation/networking/ip-sysctl.txt (from your linux kernel source),
> look up arp_filter and there's a nice description about it.
>
> IIRC there were a couple of threads sometime ago (last year?) here or on
> netdev about it.
>
>
> Alternatively, you can take a look at ARP tables support on 2.5 but I
> can't recall if they have userspace apps yet.
>
>
> Thanks,
>                 Alberto


-
: send the line "unsubscribe linux-net" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html