Preface This IBM® Redbook provides an overview of the z/OS® Security setups for Parallel Sysplex® installations that are considering serving users locally or over non-secure TCP/IP networks. It provides insight into what can be done to minimize the risks in such contexts by addressing the following operating environments: Parallel Sysplex (as a stand-alone system) security. One member of the Sysplex is exposed to a non-secure network. All members of the Sysplex can be reached from the non-secure network. The team that wrote this redbook This redbook was produced by a team of specialists from around the world working at the Montpellier European Products and Solutions Support Center (PSSC) on behalf of the International Technical Support Organization, Poughkeepsie Center.