Re: Proxy arp problems

Tom Eastep
Mon, 07 Jun 2004 14:28:44 -0000

Nico Alberti wrote:
>  > Have you verified that the problem is not a stale ARP cache in the
>  > upstream router? http://shorewall.net/ProxyARP.htm describes how to
>  > test for that problem and how to solve it (see "ARP cache")
in that
>  > article.
>
> I tried but I got this error:
>
> # arping -U -I eth1 80.23.252.59
> bind: Cannot assign requested address
>
> Probably because of the tight security on MNF.
>
> Probably another source of troubles comes from the fact that I keep on
> receiving martian packets from the network address
>
> gw kernel: martian source 80.23.252.59 from 80.23.252.56, on dev
>  eth1
> gw kernel: martian source 80.23.252.61 from 80.23.252.56, on dev
>  eth1
>
> as you probably understood I am not a routing expert but I guess that
> that can poison the arp table of the router and the firewal.
>

What is the output of:

a) ip route ls
b) arp -na