Disable Loop Back Check in Windows Server 2012

Microsoft has introduced a security feature in 2003 Server to prevent attacks on Windows servers. This feature will prevent a web application access from the host server with a fully qualified domain name. During the SharePoint installation this is one of the issues that needs to be addressed.

There are two approaches to disable loop back check; they are:

  1. Disable the feature completely.
  2. Create a FQDN exclude list.

For a SharePoint Farm it is better to disable the feature completely.

1. Go to the "Run" App:

RUN-App-windows-server-2012.jpg

2. Type "regedit" and press Enter:

Type-REGEDIT-Windows-server-2012.jpg

3. In the Registry Editor go to "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\LSA":

Registry-Editor.jpg

4. Right-click on LSA and Create a new DWORD:

Right-Click-on-LSA-and-Create-a-new-DWORD.jpg

5. Select the newly created DWORD and change the Key to DisableLoopbackCheck:

DisableLoopbackCheck.jpg


6. Right-click on DisableLoopbackCheck and modify the value:

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7. Set the value to 1 Decimal:

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8. Restart the machine.