Network performance decreases when you use a program that uses the SO_CONDITIONAL_ACCEPT socket option to communicate

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Article ID: 328264 - View products that this article applies to.
This article was previously published under Q328264
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SYMPTOMS

Network performance may decrease significantly when you use a program that is configured to communicate by using the SO_CONDITIONAL_ACCEPT socket option.

CAUSE

When you use this option, incorrect data in the IP Options field of a TCP/IP packet may cause a network firewall to filter the packet out.

RESOLUTION

Windows XP service pack information

To resolve this problem, obtain the latest service pack for Microsoft Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
322389 How to obtain the latest Windows XP service pack

Windows 2000 service pack information

To resolve this problem, obtain the latest service pack for Microsoft Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
260910 How to obtain the latest Windows 2000 service pack

Windows 2000 and Windows XP 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.

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.
Windows XP
   Date         Time   Version        Size     File name
   -----------------------------------------------------
   25-Sep-2002  23:55  5.1.2600.1127  126,336  Afd.sys
Windows 2000
   Date         Time   Version        Size     File name
   --------------------------------------------------------
   04-Sep-2002  21:11  5.0.2195.6044  118,896  Afd.sys
   11-Sep-2002  17:55  5.0.2195.6020  105,232  Msafd.dll        
   05-Sep-2002  00:07  5.0.2195.6045  313,296  Tcpip.sys
   31-Jul-2001  03:15  5.0.2195.3988   16,240  Tdi.sys
   11-Sep-2002  17:55  5.0.2195.4874   17,680  Wshtcpip.dll

STATUS

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

Windows 2000

This problem was first corrected in Windows 2000 Service Pack 4.

Windows XP

This problem was first corrected in Microsoft Windows XP Service Pack 2.

MORE INFORMATION

For additional information about how to obtain a hotfix for Windows 2000 Datacenter Server, click the following article number to view the article in the Microsoft Knowledge Base:
265173 The Datacenter program and Windows 2000 Datacenter Server product

Properties

Article ID: 328264 - Last Review: February 21, 2007 - Revision: 2.6
APPLIES TO
  • Microsoft Windows XP Professional
  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Professional Edition
  • Microsoft Windows 2000 Server
Keywords: 
kbautohotfix kbhotfixserver kbwinxpsp2fix kbqfe kbbug kbfix kbwin2000presp4fix KB328264

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