When attempting to connect to a SharePoint site from the same server as SharePoint is installed you get authentication failures.
The solution is to create a network loopback
To specify the host names that are mapped to the loopback address and can connect to Web sites on your computer, follow these 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\MSV1_0
- Right-click MSV1_0, point to New, and then click Multi-String Value.
- Type BackConnectionHostNames, and then press ENTER.
- Right-click BackConnectionHostNames, and then click Modify.
- In the Value data box, type the host name or the host names for the sites that are on the local computer, and then click OK.
- Quit Registry Editor, and then restart the IISAdmin service.