I manage some IIS6/7 servers, and usually I have to test the Frontpage/Sharepoint enabled sites to verify that it is in fact working. I ran into an issue where I couldn’t view the sites from the server (I kept getting a login message). After some digging around, I discovered that it’s the results of something called loopback. It’s a bug introduced into Windows since Windows 2003 SP1. To correct it, you must perform the following steps:
- Click Start, click Run, type regedit, and then click OK.
- In Registry Editor, locate and then click the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
- Right-click Lsa, point to New, and then click DWORD Value.
- Type DisableLoopbackCheck, and then press ENTER.
- Right-click DisableLoopbackCheck, and then click Modify.
- In the Value data box, type 1, and then click OK.
- Quit Registry Editor, and then restart your computer.
If that doesn’t work, more than likely you have a Windows Permissions user issue, which is beyond the scope of this article.