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 – configuring Squid to ignore the browser reloads


There are three ways to fix this issue using http_port and refresh_pattern directives in the Squid configuration file. Please note that the refresh_pattern rules apply to both server and client headers and can pose issues if we ignore certain headers and clients may receive stale replies.

Using ignore-cc

We have seen the ignore-cc option in the HTTP port section previously. If we use this option while specifying the HTTP port, Squid will ignore the Cache-Control HTTP header from clients and will completely depend on the Cache-Control headers supplied by the backend web servers. For example:

http_port 80 accel defaultsite=example.com vhost ignore-cc

Using ignore-reload

Using the option ignore-reload with the refresh_pattern directive, we can completely ignore the browser reloads and serve the content from cache anyway. However, this may result in serving stale content in some cases. For example:

refresh_pattern .   0 20% 4320 ignore...