Microsoft KB Archive/167055

= FTP Service Does Not Detect Port Change =

Article ID: 167055

Article Last Modified on 6/23/2005

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APPLIES TO


 * Microsoft Internet Information Server 2.0

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This article was previously published under Q167055



We strongly recommend that all users upgrade to Microsoft Internet Information Services (IIS) version 6.0 running on Microsoft Windows Server 2003. IIS 6.0 significantly increases Web infrastructure security. For more information about IIS security-related topics, visit the following Microsoft Web site:

http://www.microsoft.com/technet/security/prodtech/IIS.mspx



SYMPTOMS
When you change the port for the FTP server in the FTP properties of the Internet Service Manager, the clients still connect on the old port and cannot connect on the new port



CAUSE
The Services file, used by TCP to assign ports, is not properly updated to reflect the new port. This file is used to set both the server and client port settings, and it overrides settings in the registry pertaining to FTP ports.



WORKAROUND
To configure the FTP server for a different port, do the following:


 * 1) Using Internet Service Manager, set the FTP properties to the desired port.
 * 2) Apply the changes and stop the service.
 * 3) Open the Services file (located in the %winnt%\system32\ drivers\etc directory.
 * 4) Find the following line and change it to reflect the new port number:

ftp 21/tcp
 * 1) Save the file, then run the Services.exe file located in the \system32 directory.
 * 2) Restart the FTP service in Internet Service Manager.

Keywords: kbinterop kbprb KB167055

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