From mboxrd@z Thu Jan  1 00:00:00 1970
From: Bernhard Bock <bernhard@bock.nu>
Subject: Re: More ethernet port same ip address
Date: Sat, 19 Jul 2008 10:18:57 +0200
Message-ID: <4881A371.3060803@bock.nu>
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To: Michele Petrazzo - Unipex srl <michele.petrazzo@unipex.it>
Cc: netfilter@vger.kernel.org

Hi Michele,

Michele Petrazzo - Unipex srl wrote:
> Here the server have the two ports with 172.16.0.1 and two clients,
> connected into the two others has 172.16.0.3 and 172.16.0.10
> 
> It's there a solution for achieve this?

My proposal has nothing to do with netfilter, but you may have a look 
into "Proxy ARP".

Basically you give each interface the same IP address, put in host 
routes based on interfaces (route add -host 172.16.0.3 dev ethx) and 
enable proxy_arp in /proc/sys/net/ipv4/conf/ethx/proxy_arp. This should 
do the trick.

best regards
Bernhard