/PORT=integer

    Specifies the port number that this server monitors for incoming
    requests. For the TCP/IP transport, this qualifier specifies an
    IP port number from the port number space shared by all users
    of TCP/IP. For the DECnet and Local transports, this qualifier
    specifies a number that is used to create a unique resource name
    from the name space of all users of the Inter-Client Exchange
    (ICE) protocol. Specify a value from 1 to 16383.

    The default port number is 6500.