# The loopback network interface auto lo eth0 eth1 iface lo inet loopback # PUBLIC allow-hotplug eth0 iface eth0 inet dhcp hwaddress ether 00:C0:9F:43:93:D3 # PRIVATE allow-hotplug eth1 iface eth1 inet static address 192.168.1.1 netmask 255.255.255.0