Microsoft KB Archive/916508

= A leak occurs in the Netbt.sys file on Windows Server 2003 Terminal Server that has many NetBT connections =

Article ID: 916508

Article Last Modified on 10/11/2007

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APPLIES TO

 Microsoft Windows Server 2003 SP1, when used with:  Microsoft Windows Server 2003, Datacenter Edition for Itanium-Based Systems

 Microsoft Windows Server 2003, Enterprise Edition for Itanium-based Systems

 Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)

 Microsoft Windows Server 2003, Enterprise Edition</li></ul>

 Microsoft Windows Server 2003, Standard Edition (32-bit x86)</li></ul>

 Microsoft Windows Server 2003, Web Edition</li></ul> </li> Microsoft Windows Server 2003, Datacenter x64 Edition</li> Microsoft Windows Server 2003, Enterprise x64 Edition</li> Microsoft Windows Server 2003, Standard x64 Edition</li> Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)</li> Microsoft Windows Server 2003, Enterprise Edition</li> Microsoft Windows Server 2003, Standard Edition (32-bit x86)</li> Microsoft Windows Server 2003, Web Edition</li></ul>

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SYMPTOMS
A leak occurs in the Netbt.sys file in the following Terminal Server environments:
 * Microsoft Windows Server 2003 Service Pack 1 (SP1) Terminal Server
 * Microsoft Windows Server 2003 Terminal Server

These environments have many NetBIOS over TCP/IP (NetBT) connections. The leak in the Netbt.sys file exhausts all available TCP endpoints for outgoing traffic. This problem occurs in Terminal Server environments with thousands of log on and log off transactions per day.

Note This problem may also affect servers that do not have Terminal Server enabled.

When you use the Tdimon.exe tool on Terminal Server, you receive an error message that resembles the following:

0xC000020A STATUS_ADDRESS_ALREADY_EXISTS

Note You must restart the computer after you receive this error.

When you run the nltest /sc_query command on Terminal Server, you receive an error message that resembles the following:

ERROR_NOT_ENOUGH_MEMORY

When you run the netdom query fsmo command on Terminal Server, you receive an error message that resembles the following:

RPC_SERVER_UNAVAILABLE

Note x64-based versions of Windows Server 2003 include Windows Server 2003 SP1.

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Service pack information
To resolve this problem, obtain the latest service pack for Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

889100 How to obtain the latest service pack for Windows Server 2003

Prerequisites
To install this hotfix, you must have Windows Server 2003 Service Pack 1 (SP1) installed on your computer.

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 item in Control Panel.

Windows Server 2003, x86-based versions
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STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section. This problem was first corrected in Windows Server 2003 Service Pack 2.

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MORE INFORMATION
For more 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

Additional query words: netbt, endpoint, ephemeral port, ports, LowerConn, NbL3, Citrix, Terminal Server Farm

Keywords: kbbug kbfix kbqfe kbpubtypekc kbhotfixserver kbwinserv2003presp2fix kbwinserv2003sp2fix KB916508

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