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

Time for action – adding DNS name servers


A list of IP addresses can be passed to this directive or several IP addresses can be written on different lines like the following:

dns_nameservers 192.0.2.25 198.51.100.25
dns_nameservers 203.0.113.25

The previous configuration lines will set the name servers to 192.0.2.25, 198.51.100.25, and 203.0.113.25.

What just happened?

We added three DNS name servers to the Squid configuration file which will be used by Squid to resolve the domain names corresponding to the requests received from the clients.

Setting the hosts file

Squid can read the hostname and IP address associations from the hosts file generally found at /etc/hosts. This file normally contains hostnames for the machines or servers in the local area network. We can specify the host's file location using the directive hosts_file as shown:

hosts_file /etc/hosts

If we don't want Squid to read the host's file, we can set the value to none.

Default domain name for requests

Using the directive append_domain...