How do I configure bind to resolve a specific name and forward all others?

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http://serverfault.com – I want to configure bind on our caching dns to resolve bla.mydomain.com to (an internal host) while still forwarding all other requests to our internet provider's name servers. This should only work from our intranet, the box is not meant for external access. I got the first part working by creating a master zone for mydomain.com and adding an address entry for bla: /etc/bind/mydomain.com.hosts: $ttl 38400 mydomain.com. IN SOA dns. webmaster.mydomain.com. ( 1313763352 10800 3600 (HowTos)