Server DrivesYou may run into a case where you are running a name server (perhaps a caching-only name server) that is not allowed to communicate with Internet name servers. The most common case for this is a local caching name server being blocked by a corporate or ISP firewall.

If you are set on using your caching name server instead of the server that is allowed through the firewall, you can force your BIND name server to forward all DNS requests to the approved server(s) for you. Simply add the following configuration to the options {}; portion of your named.conf file.

options {
  forwarders { 172.16.9.9; 172.16.9.10; };
};

Remember to replace the IP addresses I've used with the IP addresses of your approved DNS servers.