You receive error 401.1 when you browse a Web site: IIS 6.0 and SharePoint 2007

Coming back the article Troubleshooting Adding server to the farm: SharePoint 2007, tried to browse the content on the one of the server and was having issues. And discussed previous time it was helped by the disabling loop back adapters.

Error message getting registered in System logs:

Event Type: Failure Audit
Event Source: Security
Event Category: Logon/Logoff
Event ID: 537
Date: Date
Time: Time
User: NT AUTHORITY\SYSTEM
Computer: Computer_Name
Description: Logon Failure:
Reason: An error occurred during logon
User Name: User_Name
Domain: Domain_Name
Logon Type: 3
Logon Process: Ðùº
Authentication Package: NTLM
Workstation Name: Computer_Name

Followed the steps in the KB To specify the host names that are mapped to the loopback address and can connect to Web sites on your computer, follow these steps:

1.    Set the

DisableStrictNameChecking

Registry entry to 1. For more information about how to do this, click the following article number to view the article in the Microsoft Knowledge Base:

281308 Connecting to SMB share on a Windows 2000-based computer or a Windows Server 2003-based computer may not work with an alias name.

2.    Click Start, click Run, type regedit, and then click OK.

3.    In Registry Editor, locate and then click the following registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\MSV1_0

4.    Right-click MSV1_0, point to New, and then click Multi-String Value.

5.    Type BackConnectionHostNames, and then press ENTER.

6.    Right-click BackConnectionHostNames, and then click Modify.

7.    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.

8.    Quit Registry Editor, and then restart the IISAdmin service.

Reference: http://support.microsoft.com/kb/896861 and http://support.microsoft.com/kb/926642 and it worked fine.

Applies to:

• SharePoint 2007
• Office 2007
• IIS 6