Can’t View Frontpage Websites On An IIS Server

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:

  1. Click Start, click Run, type regedit, and then click OK.
  2. In Registry Editor, locate and then click the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
  3. Right-click Lsa, point to New, and then click DWORD Value.
  4. Type DisableLoopbackCheck, and then press ENTER.
  5. Right-click DisableLoopbackCheck, and then click Modify.
  6. In the Value data box, type 1, and then click OK.
  7. 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.

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