I've got a network running a Windows Server 2003 domain. On the DC I've got DNS turned on. I've added a Host A record pointing to the IP address of our website (which is hosted offsite) using "www" in the name field and pointing to the IP address of our website (which is hosted offsite). When someone types "www.mydomain.org" it works for internal machines and it loads the website. When someone types in "mydomain.org" without using the "www." as part of the actual address in the web browser I get a page that the website is under construction. When I tried to a cname record for "mydomain.org" it wouldn't let me. When I tried to add a host A record for "mydomain.org" by leaving the name field at the top empty and pointing to the offsite IP address, it let me create it, but didn't work when I typed http://mydomain.org.
From outside our internal network you can get to our website using "http://www.mydomain.org" and "http://mydomain.org" because I've set up a custom A record at the web hosting company without anything in front of the domain name: ex, "mydomain.org" and it points to the IP address of the website. No ".", no "www", or anything.
Basically, I need to know how to set my local DNS server up so I can automatically go to "http://www.mydomain.org" when someone types in "http://mydomain.org", instead of getting an "Under Construction" page.