ifconfig_em0="inet Your-VPS-Main-IP-Address netmask 255.255.255.255 broadcast Your-VPS-Main-IP-Address" static_routes="net1 net2" route_net1="-net 192.99.21.254/32 Your-VPS-Main-IP-Address" route_net2="default 192.99.21.254"
2) Add Nameserver in /etc/resolv.conf
nameserver 213.186.33.99
3) Enable network.
ifup em0