FTP Service Does Not Detect Port Change

The information in this article applies to:

• Microsoft Internet Information Server version 2.0

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

5. Save the file, then run the Services.exe file located in the \system32 directory.

6. Restart the FTP service in Internet Service Manager.

Keywords          : iisftp kbinterop kbprb
Version           : winnt:2.0
Platform          : winnt
Hardware          : ALPHA x86
Issue type        : kbprb
Solution Type     : kbworkaround