Internet Explorer 6.0 Service Pack 1 cannot use the Automatic Detect Settings feature in a Windows XP-based computer to find a WPAD server

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Article ID: 829643
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Symptoms

When a Microsoft Windows XP-based computer that is running Microsoft Internet Explorer 6.0 Service Pack 1 uses the Automatic Detect Settings feature to find an automatic proxy configuration script, the Web Proxy Auto-Discovery (WPAD) protocol server cannot be found.

Cause

This problem may occur if all the following conditions are true:
  • The Windows XP-based computer has more than one network connection configured in Network Connections.
  • The Windows XP-based computer uses connection-specific Domain Name System (DNS) suffixes for each network connection.
  • The Windows XP-based computer uses Dynamic Host Configuration Protocol (DHCP) to obtain IP addresses.
  • The Windows XP-based computer has a primary DNS suffix configured in the Properties settings of My Computer.
  • The DNS domain name of the WPAD server is different from the primary DNS domain name of the Windows XP-based computer.
This problem will occur if all the conditions are true because the WPAD auto-discovery mechanism will only use the primary DNS suffix to try to find a WPAD server and the Wpad.dat file. The WPAD auto-discovery mechanism will not use the connection-specific DNS suffix to try to find the WPAD server.

Resolution

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

Microsoft Internet Explorer 6.0 Service Pack 1

File information

The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
   Date         Time   Version             Size   File name
   --------------------------------------------------------------
   15-Apr-2004  18:59  6.0.2800.1421     589,824  Wininet.dll

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

More information

For more information about the WPAD protocol, visit the "WinHTTP AutoProxy Support" Web page on the MSDN Web site: http://msdn2.microsoft.com/en-us/library/aa384240.aspx

For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Properties

Article ID: 829643 - Last Review: December 26, 2014 - Revision: 5.0
Keywords: 
kbnosurvey kbarchive kbautohotfix kbhotfixserver kbqfe kbwinxpsp2fix kbwinxppresp2fix kbfix kbbug KB829643

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