We have an external DNS providor for our real domain. This domain has a lot of sub domains.
What I want is to have an internal DNS for the same domain so that the internal version points to the local IP's and all other subdomains look at the external DNS.
Here's an example.
www.domain.com External IP (Don't need internal Entry)
intranet.domain.com Internal IP (Internal Addess 192.168.91.5)
I could probably achieve this but duplicating every A record internally I guess, but am hoping to avoid this. Is what i'm after possible.