Specifying a PASV IP Address or Port Range

If the is behind a firewall or NAT device, you may need to specify the Server's IP address or range of ports the Server chooses from when issuing IP:PORT information to clients.

To specify a PASV connection through a range of ports

  1. In the Administrator, connect to the server, then click the Server tab.

  2. In the left pane, click the Site you want to configure.

  3. In the right pane, click the Site Options tab.

  4. Select the Assign PASV mode IP Address check box.

  5. In the IP box, specify the Server's IP address as should be seen by those outside your network.

    		6.

    This usually applies under SSL sessions when the NAT or firewall device cannot see and therefore properly map the internal IP address of the Server, or when the NAT or firewall device is misconfigured. It is recommend you first try connecting to the Server with this field left as is.

  6. In the Port Range boxes, specify the range of ports the Server uses for PASV connections.

    		7.

    This is used primarily to limit the amount of ports used for the data connection portion of the FTP session, especially when the firewall or NAT device was configured to only allow traffic on certain ports.

     

    If you specify a PASV mode port range, you must open the same range of ports on your firewall.

  7. Click Apply.