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    ISA Server 2000 Hotfix for FTP Client Invalid PORT Command

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    This hotfix verifies that the IP address and port specified in an FTP client PORT command are appropriate to the current FTP session in both inbound and outbound FTP sessions.
    • Version:

      3.0.1200.297

      File Name:

      ISA2000-KB816459-x86.exe

      Date Published:

      12/11/2003

      File Size:

      104 KB

        During a normal FTP session, a PORT command can be executed to specify the client’s IP address and port for the data channel from the FTP server to the client for any following data requests. Since it is possible for the user to specify any IP address and port in this command, the user can effectively use the FTP server to perform a port scan on the client’s behalf. This hotfix verifies that the IP address and port specified in a PORT command are appropriate to the current session in inbound and outbound ftp sessions. If the command is considered invalid, the ISA Server will respond with “500 invalid PORT command.”
    • Supported Operating System

      Windows 2000, Windows Server 2003

        • Microsoft Internet Security and Acceleration Server 2000

        • Microsoft Internet Security and Acceleration Server 2000 Service Pack 1

        1. Click the Download link on this page to start the download, or choose a different language from the drop-down list and click Go.
        2. Do one of the following:
          • To start the installation immediately, click Open or Run this program from its current location.
          • To copy the download to your computer for installation at a later time, click Save or Save this program to disk.

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