Microsoft KB Archive/830520

= Two Authentication Prompts When You Use an ISAPI Filter for Authentication =

Article ID: 830520

Article Last Modified on 12/3/2007

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APPLIES TO


 * Microsoft Internet Information Services 6.0
 * Microsoft Commerce Server 2002 Standard Edition

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SYMPTOMS
When you use an Internet Services API (ISAPI) filter to implement authentication, you may receive two authentication prompts when you try to access the default document. For example, this behavior may occur when you are using Windows Authentication mode in Microsoft Commerce Server 2002.



CAUSE
The credentials that are supplied in the ISAPI filter when the filter handles the SF_NOTIFY_AUTHENTICATION notification are not used when Microsoft Internet Information Services (IIS) loads the default document. If the default document is not configured for anonymous access, the user is prompted for credentials again.



Hotfix Information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

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

Prerequisites
No prerequisites are required.

Restart Requirement
If you stop the IIS Admin service before you install this hotfix, you do not have to restart your computer after you apply this hotfix.

Hotfix Replacement Information
This hotfix does not replace any other hotfixes.

File Information
The English version of this hotfix has the file attributes (or later) 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   Architecture 07-Nov-2003 18:56  6.0.3790.101      336,896  W3core.dll       x86 07-Nov-2003 09:51  6.0.3790.101      937,472  W3core.dll       IA64



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section of this article.



MORE INFORMATION
If you are using Microsoft Commerce Server 2002 on Microsoft Windows Server 2003 with AuthFilter in Windows Authentication mode, this fix is required.

This hotfix corrects a problem in Microsoft Internet Information Services (IIS). Applications other than Commerce Server 2002 may also have this problem if IIS sends the SF_NOTIFY_AUTHENTICATION notification to the ISAPI filter and the filter then supplies the user credentials.

Keywords: kbbug kbfix kbqfe kbwinserv2003presp1fix kbhotfixserver KB830520

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