For more than 40 years, IBM® mainframes have supported an extraordinary portion of the world’s computing work, providing centralized corporate databases and mission-critical enterprise-wide applications. The IBM System z®, the latest generation of the IBM distinguished family of mainframe systems, has come a long way from its IBM System/360 heritage. Likewise, its IBM z/OS® operating system is far superior to its predecessors in providing, among many other capabilities, world-class and state-of-the-art support for the TCP/IP Internet protocol suite.

TCP/IP is a large and evolving collection of communication protocols managed by the Internet Engineering Task Force (IETF), an open, volunteer organization. Because of its openness, the TCP/IP protocol suite has become the foundation for the set of technologies that form the basis of the Internet. The convergence of IBM mainframe capabilities with Internet technology, connectivity, and standards (particularly TCP/IP) is dramatically changing the face of information technology and driving requirements for even more secure, scalable, and highly available mainframe TCP/IP implementations.

The IBM z/OS Communications Server TCP/IP Implementation series provides understandable, step-by-step guidance about how to enable the most commonly used and important functions of z/OS Communications Server TCP/IP.

This IBM Redbooks® publication explains how to set up security for the z/OS networking environment. Network security requirements have become more stringent and complex. Because many transactions come from unknown users and untrusted networks, careful attention must be given to host and user authentication, data privacy, data origin authentication, and data integrity. We also include helpful tutorial information in the appendixes of this book because security technologies can be quite complex.

Part 1. SAF-based security

Chapter 1. RACF demystified

Chapter 2. Protecting network resources

Part 2. Managing security

Chapter 3. Certificate management in z/OS

Part 3. Policy-based networking

Chapter 4. Policy agent

Chapter 5. Central Policy Server

Chapter 6. Quality of service

Chapter 7. IP filtering

Chapter 8. IP Security

Chapter 9. Network Security Services for IPSec clients

Chapter 10. Network Security Services for WebSphere DataPower appliances

Chapter 11. Network Address Translation traversal support

Chapter 12. Application Transparent Transport Layer Security

Chapter 13. Intrusion detection services

Chapter 14. IP defensive filtering

Chapter 15. Policy-based routing

Part 4. Application-based security

Chapter 16. Telnet security

Chapter 17. Secure File Transfer Protocol

Appendix A. Basic cryptography

Appendix B. Telnet security advanced settings

Appendix C. Configuring IPSec between z/OS and Windows

Appendix D. zIIP Assisted IPSec

Appendix E. z/OS Communications Server IPSec RFC currency

Appendix F. Our implementation environment