Connections time out when client computers that are running Windows Server 2003 or Windows XP try to connect to a server on a wireless network that uses IPsec NAT-T (885267)



The information in this article applies to:

  • Microsoft Windows Server 2003, Standard Edition
  • Microsoft Windows Server 2003, Enterprise Edition
  • Microsoft Windows Server 2003, 64-Bit Enterprise Edition
  • Microsoft Windows XP Professional

SYMPTOMS

In a wireless network environment that uses Internet Protocol security (IPsec) network address translation traversal (NAT-T), client computers that are running Microsoft Windows Server 2003 or Microsoft Windows XP cannot connect to a server that is running Windows Server 2003 and Microsoft Live Communications Server 2003. The connections time out. A network trace shows Internet Control Message Protocol (ICMP) "port unreachable" error messages.

This problem occurs on client computers that use a wireless network adaptor that does not support packet ownership. For example, this problem occurs on client computers that use an Agere Systems wireless network adaptor or an Intel wireless network adaptor that does not support packet ownership.

CAUSE

This problem occurs if the receive path of User Datagram Protocol (UDP)-encapsulated Encapsulating Security Protocol (ESP) packets is incorrectly processed. This condition causes packets to be dropped.

RESOLUTION

Windows Server 2003 hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows Server 2003 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

No prerequisites are required.

Restart requirement

You must restart your 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 tool in Control Panel.

Windows Server 2003, 32-bit editions

Date         Time   Version       Size     File name
----------------------------------------------------
09-Sep-2004  16:01  5.2.3790.210  335,360  Tcpip.sys

Windows Server 2003, 64-bit editions

Date         Time   Version       Size    File name
----------------------------------------------------
09-Sep-2004  15:58  5.2.3790.210  973,312  Tcpip.sys

Windows XP hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows XP service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

No prerequisites are required.

Restart requirement

You must restart your 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 tool in Control Panel.

Date         Time   Version         Size     File name  Service pack level
--------------------------------------------------------------------------
21-Sep-2004  23:30  5.1.2600.2523   359,040  Tcpip.sys  SP2
21-Sep-2004  23:44  5.1.2600.1593   344,448  Tcpip.sys  SP1

STATUS

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

MORE INFORMATION

For additional information about standard terminology that is used to describe Microsoft 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

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.

Modification Type:MinorLast Reviewed:6/1/2006
Keywords:kbQFE kbHotfixServer kbBug kbfix kbWinServ2003preSP1fix KB885267 kbAudITPRO