Defining socket addresses

You identify each target server that is running Download for z/OS® by the socket address at which the server waits for data. The socket address identifies both:

  • The IP address of the remote host
  • The port number through which the target server communicates with TCP/IP

The administrator of the remote system assigns the socket address by using port numbers that are not reserved or used by other applications on the target system. The valid range of port numbers is: 5002 - 64000, except 8251 and 8253, which are not allowed. Also, avoid 6874 - 6889 and 15080, which print servers might use for other purposes.

Download for z/OS running on the local z/OS system must use the same port number as the remote host server when they are communicating with each other:
  • On a PSF AFP Download Plus receiver, the system administrator specifies the port number of the server when starting the server. The commands to start the server (apshhrcd) are described in PSF for z/OS: AFP Download Plus.
  • On OnDemand, the system administrator specifies the port number of the server when starting the server. The commands to start the OnDemand server are described in IBM Content Manager OnDemand for Multiplatforms: Installation and Configuration Guide.