Knowledge Base

Automatic Proxy Configuration Script Does Not Work with NTLM Authentication

Article ID: 181072

Article Last Modified on 9/23/2005

Microsoft Internet Explorer 3.02
Microsoft Internet Explorer 3.02

This article was previously published under Q181072

SYMPTOMS

If you configure a Microsoft Proxy server to automatically configure Web browsers using a script and the automatic proxy configuration script resides on a server with NTLM authentication enabled, the script may not work. If the script is moved to a server configured for anonymous access, it works correctly.

In a proxy array, this may force clients to use a proxy that is not local. If there is only one proxy server on your network, clients may not be able to connect to resources, receiving the following error message:

A connection with the server could not be established

RESOLUTION

This issue is resolved by installing the following updated files for Internet Explorer:

   Wininet.dll version 4.70.1326 (dated 11/3/97) and later (NFU [non-file
   upload] version)
   Wininet.dll version 4.70.1448 (dated 11/25/97) and later (FU [file
   upload] version)

STATUS

Microsoft has confirmed this to be a problem in Microsoft Internet Explorer version 3.02 for Windows 95 and Windows NT 4.0. An update to address this problem is now available, but is not fully regression tested and should be applied only to computers experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft does not recommend implementing this update at this time. Contact Microsoft Technical Support for additional information about the availability of this update.

Additional query words: autoproxy auto

Keywords: kberrmsg kbqfe kbenv kbprb kbhotfixserver KB181072