Preparing for CICS Socket Listener

The EntireX CICS Socket Listener is a remote connector on z/OS or z/VSE to call CICS mainframe programs. This document covers the following topics:


Overview

The CICS Socket Listener is used by the RPC Server for CICS Socket Listener. Apart from installation there is no configuration necessary in CICS. Configuration is done with the RPC Server for CICS Socket Listener.See Configuring an RPC Server Instance > CICS using the Command Central GUI | Command Line.

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The implementation for CICS is based on the CICS standard listener provided by IBM. With this listener you can launch CICS transaction via TCP/IP. The launched transaction takes the TCP connection and continues the communication with the launching process.

Depending on your platform, more information on configuring the IBM standard listener for CICS can be found under the following IBM documentation:

  • z/OS Communications Server: IP CICS Socket Guide

  • z/VSE TCP/IP Support

Installing the CICS Socket Listener

The CICS Socket Listener is installed

  • together with the RPC Server for CICS, see Installing the RPC Server for CICS (z/OS | z/VSE), or

  • separately, see Installing CICS Socket Listener (z/OS | z/VSE)

Configuring the IBM Standard Listener

Depending on your platform, more information on configuring the IBM standard listener for CICS can be found under the following IBM documentation:

  • z/OS Communications Server: IP CICS Socket Guide

  • z/VSE TCP/IP Support

Start of instruction setTo start/stop the IBM standard listener

  • Use the CICS supplied transaction EZAO. The listener is automatically started/stopped when CICS is started or stopped.

Start of instruction setTo configure the IBM standard listener

  • Use the CICS-supplied transaction EZAC,ALT,LISTENER.

    • For SECEXIT, define EXXRFECS.

    • Make sure the PORT number of the IBM standard listener corresponds to the configuration parameter CICS port. See Configuring an RPC Server Instance > CICS using the Command Central GUI | Command Line.