Lets skip ahead past my noob credentials and just assume thats what I am.
We have a Win2k3 Domain,
Internal domain name is local.public.com.
The External domain name is Public.com
We have a Sharepoint Server, installation was provided by our vendor. He built two portals, His and Ours. Both on Port 80. He created a host header for His using the name, His.public.com.
I created a C-name in our DNS pointing His to server.public.com. I also added His.Public.com to the local intranet sites in my browser. Here's my problem: If I type in the server name into the address bar in my browser, it takes me to Our SharePoint Portal. If I enter His.public.com into the browser, it returns "Internet Explorer cannot display the webpage". Here's the confusing part. If I add His.public.com to my Hosts file. It resolves to the correct portal on the server. Any help would be greatly aprreciated.