You can use the New Server command to add a server.
The default value, 0 (zero), means that the server monitors the port number of the Content Manager OnDemand TCP/IP service. By default, the server monitors port number 1445. If you plan to use a port number other than 1445, then you must enter a valid port number. If you have more than one instance defined to Content Manager OnDemand, then you would have separate server definitions for every instance with unique port numbers for each instance. The value range is from 0 to 65535. To see what ports are currently in use on your system, enter the Work with TCP/IP Network Status (WRKTCPSTS) command with OPTION(*CNN).