steeles wrote:
> I thought about it. since those two IPs are in the same subnet, will it mess
> up existing routing?
>
> how to config it in bridging mode? Any more detail?
>

You need the bridge components in your kernel configuration.

Create a bridge (it will probably be br0),
Add both Ethernets to the bridge,
Set an IP address to the bridge interface
(not the component interfaces).

For bridge firewalling, use the ebtables package.

--

Tauno Voipio
tauno voipio (at) iki fi