The listener process waits for and verifies connections with client machines.
After logging on to the CICS region, enter NX01 Start, and then press <Enter>.
The CONNX TCP/IP Listener starts.
Verify start by typing CEMT INQ TA. Press <Enter>. The screen displays a list of transactions currently running. Verify that Tas(0000xxx) Tra(NX00) is listed as one of the transactions.
For CICS/VSE 2.3 and below installations, starting and stopping the CONNX CICS/VSAM TCP/IP Listener requires a dedicated terminal for the CNXSIGN external security interface program. For example, if NX01 START is issued from a CICS/VSE 2.3 terminal session, followed by a CEMT INQ TA, the terminal will lock until the CONNX Listener transaction is stopped with the NX01 STOP command. In the following example, the NX01 STOP command is issued from the VSE Console, followed by CEMT INQ TA:
Example 1:
Example 2:
Alternatively, the CONNX CICS TCP/IP Listener can be started from the VSE console and stopped from a CICS/VSE 2.3 session:
In Example 2, the NX01 START command is issued from the VSE console, which creates an NX00 transaction with a principal facility terminal of CNSL. The NX00 transaction can also be started from an autoinstalled batch terminal. In all cases, the invoking terminal is dedicated to transaction NX00 until it completes. In the current example, additional messages from the VSE console to partition F4 are deferred until transaction NX00 completes.