After restoring a snapshot to a new machine, you may encounter issues caused by the MAC address of the network adapter changing. Usually, when the network adapter changes the operating system will create a new network adapter for it. You'd typically see the network adapter on 'eth1' (or eth2 if you had private networking enabled).
/etc/sysconfig/network-scripts/ifcfg-eth0, and change the contents to the following:
DEVICE=eth0 TYPE=Ethernet ONBOOT=yes NM_CONTROLLED=yes BOOTPROTO=dhcp DNS1=184.108.40.206 NAME="System eth0"
/etc/network/interfacesand update any IP addresses to match the current server.