Ftp active and passive port information

Posted on 2011-10-13
Last Modified: 2012-05-12

I need help I had configure ftp server in windows 2008 server and it is working from outside but when firewall is on it is not working , so I had open port 21 and 22 but it still not working

I know that problem comes due to firewall so i need active and passive port configuration detail so i can configure according that
Question by:jimmithakkar
    LVL 13

    Accepted Solution

    In IIS Manager browse to FTP Firewall Support>Enter a range of values for the Data Channel Port Range and ensure that range is open on firewall
    LVL 8

    Expert Comment

    by:Salah Eddine ELMRABET

    Please share your FW configuration and make a small diagram explaining the architecture.

    Best Regards
    LVL 16

    Expert Comment

    The Active Mode port is specified by the client.  You have no control over it.  The client will request that your server connect back to the client machine on a specified port.  Port 20 is the originating port on your machine but not the destination port on the other machine.  The destination port will probably be somewhere between 1024 and 65000.  The DOS command line FTP client uses only Active Mode.

    The Passive mode port range is specified by your server.  You should configure a port range between 1024 and 65000.  The range should be at least as large as the maximum number of concurrent FTP connections you expect... probably twice as large.

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