FIX: Users sometimes receive an "HTTP 401.3 unauthorized due to access control list (ACL) on resource" error message when they visit your Web site (832911)


The information in this article applies to:

  • Microsoft Internet Information Services version 6.0

SYMPTOMS

If you have Microsoft Windows Intergrated Authentication enabled in Microsoft Internet Information Server (IIS) 6.0, users sometimes receive the following error message in their browsers:
HTTP 401.3 Unauthorized due to access control list (ACL) on resource
If a user makes the same request again later by using the same credentials, the later request will work correctly.

CAUSE

This problem occurs because the IIS worker process is recycled during the NTLM authentication handshake with the client. The state of the NTLM authentication is stored with the worker process. Therefore, the state of any NTLM authentication that is in process is lost when the recycle action occurs.

RESOLUTION

Service pack information

To resolve this problem, obtain the latest service pack for Microsoft Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

889100 How to obtain the latest service pack for Windows Server 2003

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows Server 2003 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

If you are also experiencing the symptoms that Microsoft Knowledge Base article 832139 describes, apply hotfix 832139 before you apply this hotfix.

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

832139 FIX: IIS 6.0 serves stale content if a Web site has both the IP address and the Host Headers set

Restart requirement

You must restart your computer after you apply this hotfix.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
   Date         Time   Version       Size     File name
   ----------------------------------------------------
   11-Dec-2003  19:17  5.2.3790.111  334,336  Http.sys

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Windows Server 2003 Service Pack 1.
Modification Type:MinorLast Reviewed:10/26/2005
Keywords:kbHotfixServer kbQFE kbHotfixServer kbQFE kberrmsg kbfix kbBug kbQFE kbWinServ2003preSP1fix KB832911 kbAudDeveloper kbAudITPRO
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