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:



2. Type "regedit" and press Enter:



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



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



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




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



7. Set the value to 1 Decimal:





8. Restart the machine.