Error message: 401.4 Unauthorized: Authorization denied by filter (241832)

The information in this article applies to:

Microsoft Internet Information Services 5.0

This article was previously published under Q241832

We strongly recommend that all users upgrade to Microsoft Internet Information Services (IIS) version 6.0 running on Microsoft Windows Server 2003. IIS 6.0 significantly increases Web infrastructure security. For more information about IIS security-related topics, visit the following Microsoft Web site:

http://www.microsoft.com/technet/security/prodtech/IIS.mspx

SYMPTOMS

When you use Digest Authentication in Internet Information Services version 5.0, and a user navigates to your Web site, the following error message may be received by the user when they attempt to log in:

401.4 Unauthorized: Authorization denied by filter.

CAUSE

This error typically occurs because the user's password is either not stored in reversible encryption, or the password has not been reset (in order for the hashing to take place).

MORE INFORMATION

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

222028 Setting up digest authentication for use with Internet Information Services 5.0

Modification Type:	Major	Last Reviewed:	12/29/2005
Keywords:	kbpending kbprb kbProd2Web KB241832