Access Control Causes Reverse Proxy to Fail

Retired KB Content Disclaimer

View products that this article applies to.

This article was previously published under Q177154

Expand all | Collapse all

SYMPTOMS

When Basic or Microsoft Windows NT Server Challenge Response authentications are enabled on the WWW service, and Access Control is selected (enabled) on the Web Proxy service, a reverse proxy to an internal web server will fail.

Back to the top

CAUSE

The Proxy Server tries to validate the Internet user and sends back the Proxy Authentication header that the browser is not designed to recognize. Therefore, the user will be prompted for username and password three times, then access will be denied, regardless of what username the user enters.

Back to the top

RESOLUTION

This problem is resolved in Microsoft Proxy Server 2.0 Service Pack 1 (SP1). For more information about Service Pack 1, please see the following article in the Microsoft Knowledge Base:

238375 (http://support.microsoft.com/kb/238375/EN-US/ ) Proxy Server 2.0 Service Pack 1: List of Fixes

Back to the top

WORKAROUND

Use one of the following methods to work around this problem:

Disable Access Control for the Web Proxy service.

-OR-

Locate the Web site on the WWW service on the Proxy Server.

Back to the top

STATUS

Microsoft has confirmed this to be a problem in Microsoft Proxy Server version 2.0.

Back to the top

APPLIES TO

Microsoft Proxy Server 2.0 Standard Edition

Back to the top

kbbug kbfaq kbfaq kbfix KB177154

Back to the top

Retired KB Content Disclaimer

This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.

Back to the top