HOWTO+-+Setup+Two+or+More+Network+Interfaces+In+Bridge+Mode+on+Linux

 You will need the bridge utilities for that, which all you need to do is install the bridge-utils package. code apt-get install bridge-utils code

Then add the following line into the /etc/network/interfaces file to automatically configure the bridge interface on startup or using the ifup, idown commands.

 code auto br0 iface br0 inet static bridge_ports eth0 eth1 ath0 wlan0 #you can put as many interfaces as you need here address 192.168.0.2 #address of the bridge interface netmask 255.255.255.0 gateway 192.168.0.1 code