DNS problem setting up intranet web server

[adog]

For the purposes of this email my public domain is www.myhome.com

My active directory domain is ad.myhome.com

I created a host header value on my web server for intranet and intranet.ad.myhome.com

I created a host record in DNS for intranet

There is no "." forwarder

Scenario 1:

My web server is a member of the active directory

Users in the active directory can't get to http://intranet or http://intranet.ad.myhome.com.

When they type this address or any incorrect web address it results in what seems to be a redirect to www.myhome.com

Users outside of the active directory can get to http://intranet.ad.myhome.com

Scenario 2:

My web server is not a member of the active directory

Users in the active directory can get to http://intranet but not http://intranet.ad.myhome.com.

Incorrect web addresses result in a page not found.

How do I get http://intranet to work for both types of users?

Why does there seem to be a redirect for any user within the active directory to www.myhome.com if they type an incorrect url?

Thanks,

Aaron

[Deman]

Our AD domain is actually completly different from our public one but I don't think it matters much

I'm not all that crash hot at Active Directory and DNS but all the same I'll try to help you

When your workstations request to go to intranet.ad.myhome.com what IP is the internal DNS server giving them? the internal IP or the external? Because I my initial suspcician is it's giving it the external IP which might be confusing it somehow. (with my setup for example I just send it to the internal IP)

Also which DNS server are your workstations configured to ask?

And lastly I suppose are all your workstations able to get to the intranet site by simply going to the IP address (and appropriate folder name etc) of the webserver?