Citrix Systems 9.2 manual New in This Release, Audience, Preface

Preface xi

•Appendix C, “Tutorial Examples of Advanced Policies for Rewrite.” Examples of advanced policies for use in the Rewrite feature.

•Appendix D, “Tutorial Examples of Classic Policies.” Examples of classic policies for NetScaler features such as Application Firewall and SSL.

•Appendix E, “Migration of Apache mod_rewrite Rules to Advanced Policies.” Examples of functions that were written using the Apache HTTP Server mod_rewrite engine, with examples of these functions after translation into Rewrite and Responder policies on the NetScaler.

•Appendix F, “New Advanced Expression Operators in This Release.” A summary of the new advanced expression operators and methods. This list supplements the advanced expressions documented in Appendix A.

New in This Release

NetScaler nCore Technology uses multiple CPU cores for packet handling and greatly improves the performance of many NetScaler features. Release 9.2 adds nCore support for many additional features, including load balancing and virtual private networks (VPNs). For a summary of the new features and remaining unsupported nCore features, see the Citrix NetScaler 9.2 Release Notes.

You can now use advanced policies and expressions to configure Compression, Authorization, and Application Firewall. Advanced expressions provide a rich set of expression elements along with options to control the flow of evaluation within a policy bank. These elements and options enable you to maximize the capabilities of these NetScaler features. Advanced policies, which comprise a set of rules and actions that use the advanced expression format, further enhance your ability to analyze data at various network layers and at different points along the flow of traffic. For more information about the benefits of using advanced policies and expressions, see “Benefits of Using Advanced Policies,” on page 2.

The Citrix NetScaler Policy Configuration and Reference Guide has been updated with information about new operators that you can use in advanced policy expressions. For more information about the new expression operators, see Appendix F, “New Advanced Expression Operators in This Release.”

Audience

This guide is intended for the following audience:

•NetScaler administrators who want to learn more about policies and expressions or who need to configure policies to control the behavior of particular features.