Microsoft KB Archive/940466

= FIX: On a Windows Server 2003-based computer, network traffic occurs when you run an unauthenticated DCOM client application to connect to a remote server =

Article ID: 940466

Article Last Modified on 10/11/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Enterprise Edition
 * Microsoft Windows Server 2003 Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, 64-Bit Enterprise Edition
 * Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
 * Microsoft Windows Server 2003, Datacenter Edition for Itanium-Based Systems
 * Microsoft Windows Server 2003, Datacenter x64 Edition
 * Microsoft Windows Server 2003, Enterprise Edition for Itanium-based Systems
 * Microsoft Windows Server 2003, Enterprise x64 Edition
 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Standard x64 Edition
 * Microsoft Windows Server 2003, Web Edition

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SYMPTOMS
On a Windows Server 2003-based computer, you run an unauthenticated DCOM client application to connect to a remote server. When you do this, one or more of the following problems occur:  Network traffic occurs. Even though the application releases the interface or even though the application closes, network traffic still occurs. If you enable the Audit logon event and the Audit logoff event, these events immediately fill the event log. If the application calls a remote interface six minutes after the remote interface is obtained, you receive the following error message:

RPC_E_DISCONNECTED (0x80010108) The object invoked has disconnected from its clients.





CAUSE
This problem occurs because the Remote Procedure Call Server Service (RPCSS) on the Windows Server 2003-based computer impersonates the credentials of the process token of the application. However, the remote server cannot authenticate the credentials of the process token. Then, the RPCSS tries to connect to the server by using the Anonymous Logon account. However, the Anonymous Logon account does not have the Remote Access permission on the remote server. Therefore, the RPCSS pings the remote server repeatedly until you restart the Windows Server 2003-based computer.



Hotfix information
A supported hotfix is now 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 Windows Server 2003 service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
You must have Windows Server 2003 Service Pack 2 installed to apply this hotfix.

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.

Windows Server 2003 Service Pack 2, x64-based versions


WORKAROUND
To work around this problem, use the DCOM Configuration tool (Dcomcnfg.exe) to grant the Remote Access permission to the Anonymous Logon account.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
The RPCSS implements the DCOM garbage collection mechanism for all Microsoft COM applications that run on the local computer. For more information about the DCOM garbage collection mechanism and about pinging, visit the following Microsoft Developer Network (MSDN) Web site:

http://msdn2.microsoft.com/en-us/library/ms809311.aspx

For more information about software update terminology, 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: RestrictRemoteClients ComplexPing pinging

Keywords: kbfix kbqfe kbpubtypekc kbexpertiseinter kbhotfixserver KB940466

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