Microsoft KB Archive/241832

= Error message: 401.4 Unauthorized: Authorization denied by filter =

Article ID: 241832

Article Last Modified on 11/21/2006

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APPLIES TO


 * Microsoft Internet Information Services 5.0

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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

Additional query words: iis

Keywords: kbpending kbprb kbprod2web KB241832

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