Enabling Access Control in Web Proxy May Return a Blank Page

ID: Q178173

The information in this article applies to:

SYMPTOMS

If you enable access control and defined a valid Microsoft Windows NT user or group account in Proxy Server 2.0 installed over Internet Information Server version 4.0 (IIS), the Web Proxy clients may fail to connect and display one of the following error messages:

NOTE: The error message depends on the browser you use.

Microsoft Internet Explorer version 4.0 and 4.01:

Nothing returned to browser (no error or blank page)
Microsoft Internet Explorer version 3.02:
The requested header not found.
Netscape Navigator version 3.02:
Document contains no data.


CAUSE

This issue is caused by a problem with the authentication settings in IIS 4.0 and the Web Proxy ISAPI filter.


RESOLUTION

A supported fix that corrects this problem is now available from Microsoft, but it has not been fully regression tested and should be applied only to systems experiencing this specific problem. If you are not severely affected by this specific problem, Microsoft recommends that you wait for the next Windows NT service pack that contains this fix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://www.microsoft.com/support/supportnet/overview/overview.asp
The English version of this fix should have the following file attributes or later:

   Date      Time    Version      Size    File name     Platform
   -------------------------------------------------------------
   1/23/98 6:20 PM               328,896 Asp.dll        Intel
   1/23/98 6:22 PM                56,496 Convlog.exe
   1/23/98 6:20 PM                79,808 Ftpsvc2.dll
   1/23/98 6:18 PM               182,592 Infocomm.dll
   1/23/98 6:18 PM                71,232 Metadata.dll
   1/23/98 6:19 PM               187,152 W3svc.dll 
    
   1/23/98 6:25 PM               541,968 Asp.dll        Alpha
   1/23/98 6:26 PM               106,256 Convlog.exe
   1/23/98 6:24 PM               123,664 Ftpsvc2.dll
   1/23/98 6:23 PM               299,792 Infocomm.dll
   1/23/98 6:23 PM               131,856 Metadata.dll
   1/23/98 6:24 PM               375,568 W3svc.dll

NOTE: If this product was already installed on your computer when you purchased it from the Original Equipment Manufacturer (OEM) and you need this fix, please call the Pay Per Incident number listed on the above Web site. If you contact Microsoft to obtain this fix, and if it is determined that you only require the fix you requested, no fee will be charged. However, if you request additional technical support, and if your no-charge technical support period has expired, or if you are not eligible for standard no-charge technical support, you may be charged a non-refundable fee.

For more information about eligibility for no-charge technical support, see the following article in the Microsoft Knowledge Base:
Q154871 Determining If You Are Eligible for No-Charge Technical Support


STATUS

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


WORKAROUND

Use one of the following methods:

Method 1

Disable Access Control in Web Proxy Service by opening the Web Proxy Properties within the MMC and go to the Permissions tab. Clear the Enable Access Control check box.

Method 2

Disable Anonymous access for the default web site in IIS 4.0.

NOTE: This will enable Proxy clients to connect to the Internet; however, it does not allow anonymous users to connect to the default web site if the server is also used for Internet publishing.

Additional query words: ie faq frequently asked questions 


Keywords          : kberrmsg kbsetup prx2faq kbfaq pxssetup 
Version           : winnt:2.0,4.0
Platform          : winnt 
Issue type        : kbbug

Last Reviewed: August 11, 1999