Book Image

Implementing NetScaler VPX??? - Second Edition

By : Marius Sandbu
Book Image

Implementing NetScaler VPX??? - Second Edition

By: Marius Sandbu

Overview of this book

With a large demand for responsive websites and availability of services, IT administrators are faced with an ever-rising need for services that are optimized for speed. NetScaler VPX is a software-based virtual appliance that provides users with the comprehensive NetScaler feature set. Implementing apps and cloud-based services is much easier with its increased service performance and integrated security features. This book will give you an insight into all the new features that NetScaler VPX™ has to offer. Starting off with the basics, you will learn how to set NetScaler up and configure it in a virtual environment including the new features available in version 11, such as unified gateway and portal theme customization. Next, the book will cover how to deploy NetScalar on Azure and Amazon, and you will also discover how to integrate it with an existing Citrix infrastructure. Next, you will venture into other topics such as load balancing Microsoft and Citrix solutions, configuring different forms of high availability Global Server Load Balancing (GSLB), and network optimization. You will also learn how to troubleshoot and analyze data using NetScaler's extensive array of features. Finally, you will discover how to protect web services using an application firewall and will get to grips with other features such as HTTP, DOS, and AAA.
Table of Contents (10 chapters)
9
Index

TCP tuning


Much of the traffic that is going through NetScaler is based on the TCP protocol. Either it is ICA-Proxy, HTTP, or something similar.

TCP is a protocol that provides a reliable, error-checked delivery of packets back and forth. This ensures that data is successfully transferred before being processed further. TCP has many features to adjust bandwidth during transfer, congestion checking, adjusting segment sizing, and so on, which we will delve into a bit in this section.

As mentioned in an earlier chapter, we can adjust the way NetScaler uses TCP using TCP profiles. By default, all services and vServers that are created on the NetScaler use the default TCP profile nstcp_default_profile.

These profiles can be found under System | Profiles | TCP Profiles. Make sure not to alter the default TCP profile without properly consulting the network team, as this affects the way TCP works for all default services on NetScaler.

This default profile has most of the different TCP features turned...