HTTP 401

You are not authorized to view this page

Most likely causes:

You do not have permission to view this directory or page
using the credentials that you supplied.

What you can try:

Contact the Web site administrator if you believe you should
be able to view this directory or page.
Go back to login page to try again with different credentials.
Go back to the previous page you visited in the web site,
to make an alternative selection.
Close this page and return to the company's web site.

More Information

This error (HTTP 401 Unauthorised) appears on the screen as either one of:  HTTP 401.1,  HTTP 401.2,  HTTP 401.3,  HTTP 401.4 and  HTTP 401.5.  Below, can be found short explanations of these codes.

HTTP 401.1:  Denied by invalid user credentials.

Description

Authentication was attempted, but failed.

IIS failed to log on a user to execute the request.  All requests must be associated with a user, even if the request is anonymous.

HTTP 401.2:  Denied by server configuration.

Description

Authentication was not attempted because the server and client could not agree on an authentication protocol.

The client browser and Internet Information Services (IIS) could not agree on an authentication protocol.

HTTP 401.3:  Denied by resource ACL.

Description

Authentication was successful, but the account that authenticated does not have sufficient permissions to access the requested resource or content.  

This error is returned when the user successfully authenticated to the server, but the user does not have NTFS permissions to the content requested.

HTTP 401.4:  Denied by custom ISAPI filter.

Description

An ISAPI filter loaded denied the request.

HTTP 401.5:  Denied by custom ISAPI/CGI Web
application.

Description

An ISAPI extension or CGI application denied the request.

Technical Information