Defining the default CICS userid to RACF

If you intend using RACF® to authorize terminal users to access CICS® resources, you should define a default CICS userid to RACF and specify it on the CICS system initialization parameter, DFLTUSER. This default userid assigns the security attributes to be used for all CICS terminal users who do not sign on with the CESN transaction (or a user-written equivalent).

During startup, CICS tries to sign on the default userid. If it is not signed on (for example, if not defined), CICS issues message DFHSN0701 and terminates CICS initialization. After the valid default CICS userid is signed on, its security attributes are used for all CICS terminal users who do not sign on with the CESN transaction. If the default userid is defined to RACF with a CICS segment, the operator attributes in that segment are also used for users who do not sign on.

For information about defining the userid to RACF, see the CICS RACF Security Guide.

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