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

Access controls in reverse proxy mode


When Squid is configured in reverse proxy mode or our proxy server is acting as a surrogate, it'll be accepting requests from all over the Internet. In this case, we can't form a list of clients or subnets to allow access to HTTP via our proxy server, as we did in forward proxy mode. However, we'll have to make sure that our proxy server doesn't accept requests for origin servers that we are not accelerating.

We should note that we'll have to be clever while constructing access rules when we are using the same Squid instance for reverse proxying as well as forward proxying. We'll have to allow access to foreign origin servers so that our clients can access foreign websites using our proxy server. Later, we'll have a look at the access control configuration for various types of setups.

Squid in only reverse proxy mode

When we have configured Squid to work only as a reverse proxy, we need to restrict access to the origin server which we are accelerating....