Ubuntu- adding new interfaces Rumi, June 28, 2009 It was a little tricky than my centos or suse or fedora experiences, start looking for- /etc/network/interfaces And here goes my configurations- # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo eth0 eth1 iface lo inet loopback # The primary network interface iface eth0 inet static address 123.45.6.78 netmask 255.255.255.0 network 123.45.6.0 broadcast 123.45.6.255 gateway 123.45.6.1 dns-nameservers 127.0.0.1 202.53.160.6 dns-search ensiigen.com pre-up iptables-restore < /etc/iptables post-down iptables-save -c > /etc/iptables # dns-* options are implemented by the resolvconf package, if installed iface eth1 inet static address 192.168.0.107 netmask 255.255.255.0 network 192.168.0.0 broadcast 192.168.0.255 Now need to restart the ethernet interfaces- /etc/init.d/networking restart Administrations Configurations (Linux)