Mapped DNS hostname to intranet, now asks for user/pass?
Our internet home page points to the intranet server and has always just used the actual server name, however I have wanted to move to a more consistent setup using our main domain name (thus setting an internal DNS mapping to intranet.ourdomain.com).
Quite bizarrely, for half the school (mixed students, staff) this asks for a username/password to the actual web server (popup challenge box) whereas the other half it loads up the index.php as expected. For those who get the user/pass challenge, they can manually browse to the intranet by going direct to the server without issue.
Any reason why this would be happening? In IIS 7.5 (Win Svr 2k8 R2) we use Windows authentication (as there are a few things that we need this for, such as determining whether they're staff or student and auto login to mrbs etc); if we enable anon auth then it causes other issues.
Is this something simple that needs changing?