1. Remove the kernel’s networking interface rules file so that it can be regenerated $ rm -f /etc/udev/rules.d/70-persistent-net.rules
  2. Restart $ reboot
  3. Update HWADDR and Remove UUID $ vi /etc/sysconfig/network-scripts/ifcfg-eth0
  4. Update GATEWAY $ vi /etc/sysconfig/network
  5. Check firewall rules $ vi /etc/sysconfig/iptables