I have these hosts at a sister division that are not defined in public DNS. They
are like this:

and so on....

Now abcd.com is the part that IS out there on public DNS (which would include
things like www.abcd.com).

How do I define these subdomains on my private DNS server but still have it do a
forward lookup for everthing else pertaining to abcd.com?

If I just enter an A record for xxx.something.abcd.com, then my DNS server won't
resolve www.abcd.com.

Can anyone point me to a good white paper on how to do this, assuming that it
can be done.

Terry Davis
Sr. Network Administrator