TCP/IP connection security

TCP/IP connections to CICS servers can be secured with bind security to prevent an unauthorized client system from connecting to CICS and user security to restrict the CICS resources that can be accessed by a user.

Link security

Link security is not supported for TCP/IP CICS server connections.

Bind security

Bind security prevents unauthorized remote systems from connecting to CICS. For TCP/IP CICS server connections, bind security is controlled using firewall rules.

User security

User security ensures that user IDs and passwords are supplied for all incoming transaction attach requests to CICS. To specify user security, set ATTACHSEC=VERIFY on the TCPIPSERVICE definition on the CICS server. If user security is not required set ATTACHSEC=LOCAL. TCP/IP connections do not support the use of ATTACHSEC=IDENTIFY.