External communication

Define the following ports to your firewall that protect the z/OS® host, as they are used for client-host communication (using the tcp protocol):

• Debug manager services, default port 5335. The port can be set in the DBGMGR started task JCL. Communication on this port can be encrypted.
• When z/OS Debugger is started with Language Environment® (LE) option TEST(,,,TCPIP&&ipaddress%8001:*) or TEST(,,,DIRECT&&ipaddress%8001:*), it is instructed not to use Debug Manager but contact the Eclipse client directly at port 8001. This implies, from a TCP/IP perspective, that z/OS Debugger is a client that contacts a server (the Debug UI) in the Eclipse IDE.