auto lo eth0 iface lo inet loopback iface eth0 inet static address Your-VPS-Main-IP-Address netmask 255.255.255.255 broadcast Your-VPS-Main-IP-Address post-up route add 192.99.21.254 dev eth0 post-up route add default gw 192.99.21.254 pre-down route del 192.99.21.254 dev eth0 pre-down route del default gw 192.99.21.254
2) Add Nameserver in /etc/resolv.conf
nameserver 213.186.33.99
3) Enable network.
ifup eth0