Telnet 3270 Ports

The TN3270 server requires at least one port to listen for client connections. This panel allows you to manipulate existing ports as well as add new ports for the TN3270 server to use. The standard port reserved by the IETF for TN3270 server use is port number 23. This is the default when you define your first TN3270 port and it is the default for all TN3270 clients.

Before you begin, you need to know the port number of the port you want to define, edit or remove. Here are steps to complete everything available through this panel. Your steps will be limited by the tasks you chose to accomplish:

Steps

  1. Click Add to launch the a wizard, which enables you to add a new port for TN3270 to listen on.
  2. Fill in the required fields on the wizard.
  3. Return to this panel.
  4. Click Edit to edit a port you've selected. (If you haven't selected a port in the list, the Edit button is disabled.)
  5. Click Copy to copy an existing port definition you've selected into a new one. (If you haven't selected a port in the list, the Copy button is disabled.)
  6. Click Remove to delete a port definition you've selected. (If you haven't selected a port in the list, the Remove button is disabled.)
  7. Click Report to display a snapshot of what the configuration file would look like if you save all your input at this point and ask the GUI to create the file.
  8. Once the first listening port is configured, you can select whether Telnet should be started as part of the TCP/IP stack, or started separately in its own address space.

You have completed this panel after you have added, edited, copied or removed defined ports, or viewed a report, and selected how Telnet should start.

Fields

Ports table

Indicate how the TN3270 server should get started

Push buttons
Click Add to launch a wizard, which enables you to add a new TN3270 port.
Click Edit to edit a port you've selected.
Click Copy to copy an existing port definition you've selected.
Click Remove to delete a port definition you've selected.
Click Report... to display a snapshot of what the configuration file would look like if you save all your input at this point and ask the configuration demo to create the file.
Click Close to return to the IBM TCP/IP Configuration Demo for z/OS main customization panel.