TCP/IP ports
Figure 1 shows the TCP/IP ports that can be used by z/OS® Explorer, z/OS Debugger and if installed, IBM® Developer for z/OS. The arrows show the party that does the bind (arrowhead side) and the one that connects.
Figure 2 shows how the TCP/IP port works without Debug Manager.
For more information on RSE ports, see in the IBM Developer for z/OS Host Configuration Reference.