Two Authentication Prompts When You Use an ISAPI Filter for Authentication

Hotfix Download Available
View and request hotfix downloads

View products that this article applies to.

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.

Back to the top

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.

Back to the top

RESOLUTION

Hotfix Information

A supported hotfix is 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 software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if 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. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:

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

Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

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

Back to the top

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section of this article.

Back to the top

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.

Back to the top