Subdomain nameserver configuration question...

[Kyle McDonald]

Hi all,

In a past life I have successfully setup bind to run a subdomain on a 
network that was wide open to the internet (It was a university 
network.) In that case my nameservers were configured with the list root 
domain servers, and when requests for hosts in the parent domain or 
other subdomains were received they were of course resolved working at 
the root and down to the parent, etc. I don't know if this was the right 
way, but it worked, and caches were used most of the time.

Anyway, I now find myself setting up nameservers for a subdomain, where 
the parent domain is using a split-horizon, or spilt-DNS setup. So far 
I've setup bind with the hint DB of root servers, and it's working great 
for resolving records in domains outside the company (we have a NAT 
firewall so that is needed.) but it also means that lookups for hosts in 
the parent (or other-subdomains of the parent) get hung up try to be 
resolved by the external side of the parent domain which doesn't know 
anything about any of them.

I've read through the Split DNS configuration, and it covers setting 
that up pretty well, but I haven't seen any mention of how to configure 
child subdomains of the parent.

I don't know if it matters, but for completeness I'll add that (at 
least) the internal side of the parent domain is served by 2 Win2003 AD 
machines with MS DNS.

What do I need to do to make sure that requests for the parent and other 
internal subdomains get resolved internally?

       -Kyle