Error Message: 401.4 Unauthorized: Authorization Denied by Filter

• Microsoft Internet Information Services version 5.0

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 additional information about Digest Authentication, click the article number below to view the article in the Microsoft Knowledge Base:

Q222028 Setting Up Digest Authentication for Use with Internet Information Services 5.0

Additional query words: iis

Keywords :
Version : winnt:5.0
Platform : winnt
Issue type : kbprb