Windows Firewall may drop the connection request when a host computer tries to connect to a client computer that is running Microsoft Windows XP with Service Pack 2

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Article ID: 929483 - View products that this article applies to.
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SYMPTOMS

On a client computer that is running Microsoft Windows XP with Service Pack 2 (SP2), Windows Firewall may drop the connection request when the host computer tries to connect to the client computer.

This problem occurs if the following conditions are true:
  • The client computer uses a program that is located on a file server.
  • The program is in the client computer's Windows Firewall exception list.
  • The shared folder on the file server is mapped to a drive letter.
  • The path of the file server is a Distributed File System (DFS) path.
  • The file server program authenticates against a host computer.

CAUSE

This problem occurs if the DFS path is incorrectly parsed.

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

To apply this hotfix, you must have Windows XP with Service Pack 2 (SP2) installed.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) 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 item in Control Panel.
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File nameFile versionFile sizeDateTimePlatform
Hnetcfg.dll5.1.2600.3051344,06419-Dec-200618:53x86
Updspapi.dll6.2.29.0371,42419-Jan-200619:29x86

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 terms that are used to describe software updates, 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: 929483 - Last Review: October 8, 2011 - Revision: 3.0
APPLIES TO
  • Microsoft Windows XP Professional
  • Microsoft Windows XP Home Edition
Keywords: 
kbautohotfix kbwinxpsp3fix kbwinxppresp3fix kbexpertiseadvanced kbfix kbbug kbHotfixServer kbqfe KB929483

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