/PASSIVE=option
    Controls whether the FTP client or server initiates the data
    connection. If you do not specify this qualifier, the Internet
    Protocol appropriate value is used. The values are: OFF for IPv4,
    ON for IPv6.
    The following table describes the /PASSIVE options:
    Option      Description
    OFF         The FTP server initiates the data connection.
    ON          The FTP client initiates the data connection.
    (default)
                This is often used where a firewall between the FTP
                client and server prevents the server from making an
                outbound connection.
                ON is the default value only if /PASSIVE is
                specified.
    The underlying TCP/IP Networking product must recognize this
    qualifier and must support FTP passive in order for this
    qualifier to have an effect.
    Note that the /PASSIVE qualifier is equivalent to the FTP PASV
    command.