Microsoft KB Archive/925522

= An FTP session that is copying a file from an FTP server appears to stop responding on a client computer that is running Windows Server 2003 =

Article ID: 925522

Article Last Modified on 10/11/2007

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APPLIES TO


 * 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 x64 Edition
 * Microsoft Windows Server 2003, Enterprise x64 Edition
 * Microsoft Windows Server 2003, Standard x64 Edition
 * Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition
 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Web Edition

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SYMPTOMS
Consider the following scenario:
 * On a client computer that is running Microsoft Windows Server 2003, you connect to an FTP server.
 * Windows Firewall is installed on the client computer.
 * You run separate FTP sessions on the client computer to copy files of different sizes from the FTP server.
 * The FTP session that is copying the smaller file finishes its copy operation.

In this scenario, the FTP session that is copying the larger file appears to stop responding (hang).



CAUSE
This problem occurs because the Windows Firewall driver (Ipnat.sys) incorrectly closes the FTP session that is copying the larger file instead of closing the FTP session that is finished copying the smaller file.



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
No prerequisites are required.

Restart requirement
You must stop and start the firewall service on 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, x86-based versions


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.



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

Keywords: kbbug kbfix kbqfe kbpubtypekc kbexpertiseadvanced kbhotfixserver kbwinserv2003presp2fix kbwinserv2003sp2fix KB925522

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