Book Image

Squid Proxy Server 3.1: Beginner's Guide

Book Image

Squid Proxy Server 3.1: Beginner's Guide

Overview of this book

Squid Proxy Server enables you to cache your web content and return it quickly on subsequent requests. System administrators often struggle with delays and too much bandwidth being used, but Squid solves these problems by handling requests locally. By deploying Squid in accelerator mode, requests are handled faster than on normal web servers making your site perform quicker than everyone else's! Squid Proxy Server 3.1 Beginner's Guide will help you to install and configure Squid so that it is optimized to enhance the performance of your network. The Squid Proxy Server reduces the amount of effort that you will have to put in, saving your time to get the most out of your network. Whether you only run one site, or are in charge of a whole network, Squid is an invaluable tool that improves performance immeasurably. Caching and performance optimization usually requires a lot of work on the developer's part, but Squid does all that for you. This book will show you how to get the most out of Squid by customizing it for your network. You will learn about the different configuration options available and the transparent and accelerated modes that enable you to focus on particular areas of your network. Applying proxy servers to large networks can be a lot of work as you have to decide where to place restrictions and who should have access, but the straightforward examples in this book will guide you through step by step so that you will have a proxy server that covers all areas of your network by the time you finish the book.
Table of Contents (20 chapters)
Squid Proxy Server 3.1 Beginner's Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

What is reverse proxy mode?


In previous chapters, we have learned to use Squid to cache the web documents locally so that we can enhance the user experience. This is done by serving the cached web documents from the proxy server, which is generally on the same local network as the clients. So, we can visualize this behavior using the following diagram:

As we can see in the previous diagram, we try to cache the responses received from various web servers on the Internet and then use those cached responses to serve the subsequent requests for the same web documents. In short, we are using Squid to improve the performance of our Internet connection.

Exploring reverse proxy mode

Now, consider the scenario from a point of view of a web server. Let's say that the website www.example.com is hosted on a web server and there are tens of thousands of clients browsing the website. So, in the scenario where a website gets way too many visitors, the web server will be overloaded and we would have to distribute...