Logon security checking is performed whenever a CICS® region logs on to the CICS-supplied interregion communication (IRC) program, DFHIRP.
CICS interregion communication uses the external security manager to check that CICS regions logging on to IRC are the regions they claim to be.
Each region that uses the IRC access method must be authorized to RACF® in a DFHAPPL.applid profile in the RACF FACILITY class. This requires the definition of a DFHAPPL.applid profile for each region that logs on to DFHIRP, and that each CICS region userid has UPDATE access to its own DFHAPPL.applid profile.
When a batch job connects to a CICS region using IRC, the CICS region logs on to IRC, and requires UPDATE access to its own DFHAPPL applid profile as described above.