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This Communications Server (CS) for z/OS TCP/IP Implementation series provides easy-to-understand, step-by-step how-to guidance on enabling the most commonly used and important functions of CS for z/OS TCP/IP. With the advent of TCP/IP and the Internet, network security requirements have become more stringent and complex. Because many transactions come from untrusted networks such as the Internet, and from unknown users, careful attention must be given to host and user authentication, data privacy, data origin authentication, and data integrity. In addition, there are certain applications shipped with TCP/IP such as File Transfer Protocol (FTP) that, without proper configuration and access controls in place, could allow unauthorized users access to system resources and data. This IBM Redbooks publication explains how to set up security for your z/OS networking environment. For more specific information about CS for z/OS base functions, standard applications, and high availability, refer to the other volumes in the series. These are: - Communications Server for z/OS V1R9 TCP/IP Implementation, Volume 1: Base Functions, Connectivity, and Routing, SG24-7532 - Communications Server for z/OS V1R9 TCP/IP Implementation, Volume 2: Standard Applications, SG24-7533 - Communications Server for z/OS V1R9 TCP/IP Implementation, Volume 3: High Availability, Scalability, and Performance, SG24-7534

This Communications Server (CS) for z/OS TCP/IP Implementation series provides easy-to-understand, step-by-step guidance on enabling the most commonly used and important functions of CS for z/OS TCP/IP. In this IBM Redbooks publication we begin with a discussion of Virtual IP Addressing (VIPA), a TCP/IP high-availability approach introduced by the z/OS Communications Server, both with and without using a dynamic routing protocol. Then we discuss a number of different workload balancing approaches that can be used with the z/OS Communications Server. Finally, we explain the optimized Sysplex Distributor intra-sysplex load balancing. This function is an improved multitier application support using optimized local connections together with weight values from extended WLM interfaces. For more specific information on CS for z/OS base functions, standard applications, and security, refer to the other volumes in the series. These are: - Communications Server for z/OS V1R9 TCP/IP Implementation Volume 1: Base Functions, Connectivity, and Routing, SG24-7532 - Communications Server for z/OS V1R9 TCP/IP Implementation Volume 2: Standard Applications6 Font, SG24-7533 - Communications Server for z/OS V1R9 TCP/IP Implementation Volume 4: Security and Policy-Based Networking, SG24-7535

The focus of this IBM Redbook is networking infrastructure aspects of modernizing an SNA network environment. Additionally, modernizing SNA concerns itself with how to modernize access to existing SNA core business applications. In order to provide a reference model for modernizing SNA, this book introduces a selected set of SNA application access modernization technologies, which go beyond the normal networking infrastructure. Some of the technologies discussed in this book aim at improving the user experience when accessing traditional SNA 3270 applications and at exposing existing mainframe SNA applications as Web services. Such technologies will primarily be introduced from a network topology and connectivity perspective. While a description of the full set of capabilities of such technologies is beyond the scope of this document, readers can refer to other technology-specific and product-specific documentation from IBM and other vendors for that information. The intended audience for this book are IBM System z technical managers, system architects, and network administrators who are responsible for setting the overall strategic directions for an enterprise networking infrastructure. This infrastructure includes Systems Network Architecture (SNA) and Internet Protocol (IP) networking technologies, branch or remote location access networks, data center connectivity, and business partner connectivity.

This IBM Redbooks publication will help you to tailor and configure Communications Server for z/OS (CS z/OS) to make full use of Enterprise Extender (EE) capabilities. It focuses on the migration of your Advanced Peer-to-Peer Networking (APPN) environment to Enterprise Extender, while offering easy-to-understand, step-by-step guidance. Sample scenarios are provided that discuss Enterprise Extender connections between multiple z/OS systems as well as between z/OS and non-mainframe systems. The non-mainframe platforms in our examples include IBM Communications Server for AIX (CS/AIX), IBM Communications Server for Linux (CS Linux), IBM Communications Server for Windows (CS Windows), IBM Personal Communications for Windows (PCOMM), and i5/OS Enterprise Extender support. This publication provides information to assist you with the planning, implementation, and setup of Enterprise Extender. In addition, it describes helpful utilities and commands that you can use to monitor and operate the Enterprise Extender environment. It discusses the motivation for migrating to Enterprise Extender and explains the planning decisions that must be considered before attempting each phase of a migration. Further, it illustrates working scenarios, highlighting the important aspects of configuration and connectivity, and discusses techniques for avoiding undesirable situations. It explains the changes that are necessary in the VTAM and TCP/IP definitions to support Enterprise Extender in each scenario. You should have a solid backgro

This Communications Server (CS) for z/OS TCP/IP Implementation series provides easy-to-understand step-by-step how-to guidance on enabling the most commonly used and important functions of CS for z/OS TCP/IP. With the advent of TCP/IP and the Internet, network security requirements have become more stringent and complex. Because many transactions come from untrusted networks such as the Internet, and from unknown users, careful attention must be given to host and user authentication, data privacy, data origin authentication, and data integrity. In addition, there are certain applications shipped with TCP/IP such as File Transfer Protocol (FTP) that, without proper configuration and access controls in place, could allow unauthorized users access to system resources and data. This IBM Redbook explains how to set up security for your z/OS networking environment. For more specific information about CS for z/OS base functions, standard applications, and high availability, refer to the other volumes in the series. These are: - Communications Server for z/OS V1R8 TCP/IP Implementation, Volume 1: Base Functions, Connectivity, and Routing, SG24-7339 - Communications Server for z/OS V1R8 TCP/IP Implementation, Volume 2: Standard Applications, SG24-7340 - Communications Server for z/OS V1R8 TCP/IP Implementation, Volume 3: High Availability, Scalability, and Performance, SG24-7341

In this IBM Redbook we begin with a discussion of Virtual IP Addressing (VIPA), a TCP/IP high-availability approach introduced by the z/OS Communications Server. We then proceed to show how VIPA can be used for high availability—both with and without using a dynamic routing protocol. Then we discuss a number of different workload balancing approaches that can be used with the z/OS Communications Server. In this book we use the terms internal and external application workload balancing to refer to approaches where the decision as to which application instance should received a given connection request is made within the sysplex environment (such as by Sysplex Distributor) or outside of it (using a separate, external, workload balancing solution), respectively. Finally, we explain the optimized Sysplex Distributor intra-sysplex load balancing. This function is an improved multi-tier application support using optimized local connections together with weight values from extended WLM interfaces. For more specific information about CS for z/OS base functions, standard applications, and security, reference the other volumes in the series. These are: Communications Server for z/OS V1R8 TCP/IP Implementation, Volume 1 - Base Functions, Connectivity, and Routing, SG24-7339 Communications Server for z/OS V1R8 TCP/IP Implementation, Volume 2 - Standard Applications, SG24-7340 Communications Server for z/OS V1R8 TCP/IP Implementation, Volume 4 - Policy-Based Network Security, SG24-7342

This Communications Server (CS) for z/OS TCP/IP Implementation series provides easy-to-understand step-by-step how-to guidance on enabling the most commonly used and important functions of CS for z/OS TCP/IP. In this IBM Redbook we begin by providing an introduction to CS for z/OS TCP/IP. We then discuss the System Resolver showing the implementation of global and local settings for single and multi-stack environments. We then present implementation scenarios for TCP/IP Base functions, Connectivity, Routing, and IPv6 support. Finally, we discuss the Sysplex subplexing available with z/OS V1R8.0 Communications Server. For more specific information about CS for z/OS standard applications, high availability, and security, refer to the other volumes in the series: - Communications Server for z/OS V1R8 TCP/IP Implementation, Volume 2 - Standard Applications, SG24-7340 - Communications Server for z/OS V1R8 TCP/IP Implementation, Volume 3 - High Availability, Scalability, and Performance, SG24-7341 - Communications Server for z/OS V1R8 TCP/IP Implementation, Volume 4 - Policy-Based Network Security, SG24-7342

With continual advances in hardware and TCP/IP networking capabilities, this very popular book deserves an update. The TCP/IP protocol suite has become the de facto standard for computer communications in today's networked world. The ubiquitous implementation of a specific networking standard has led to an incredible dependence on the applications enabled by it. Today, we use the TCP/IP protocols and the Internet not only for entertainment and information, but to conduct our business by performing transactions, buying and selling products, and delivering services to customers. We are continually extending the set of applications that leverage TCP/IP, thereby driving the need for further infrastructure support. It is our hope that both the novice and the expert will find useful information in this publication.

This IBM Redbook is designed for a one-semester course intended to provide information systems students with the background knowledge and skills necessary to begin using the basic communications facilities of a mainframe-based system. It provides a broad understanding of networking principles and the hardware and software components necessary to allow the mainframe to participate in a high volume data communications network. It is part of a planned series of textbooks designed to introduce students to mainframe concepts and help prepare them for a career in large systems computing. While many of the networking concepts covered are operating system-independent, the main emphasis is on the z/OS operating system. You are assumed to have successfully completed introductory courses in computer system concepts, including courses in computer organization and architecture, operating systems, data management and data communications, and systems design and analysis. A basic understanding of z/OS job control, library structure, and system libraries is assumed. It is strongly recommended that you have already completed an introductory course on z/OS, such as one that uses Introduction to the New Mainframe: z/OS Basics or a comparable text. In some instances, the z/OS Basics course and the course associated with this textbook could be taken together.

This new and improved Communications Server (CS) for z/OS TCP/IP Implementation series provides easy-to-understand step-by-step how-to guidance on enabling the most commonly used and important functions of CS for z/OS TCP/IP. In this IBM Redbook we provide useful implementation scenarios and configuration recommendations for many of the TCP/IP standard applications supported by the z/OS Communications Server. For more specific information about CS for z/OS base functions, high availability, and security, please reference the other volumes in the series. These are: --Communications Server for z/OS V1R7 TCP/IP Implementation, Volume 1 - Base Functions, Connectivity, and Routing, SG24-7169 --Communications Server for z/OS V1R7 TCP/IP Implementation, Volume 3 - High Availability, Scalability, and Performance, SG24-7171 --Communications Server for z/OS V1R7 TCP/IP Implementation, Volume 4 - Security and Policy, SG24-7172