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

Debugging problems


Mostly, we encounter problems that are well-known and are a result of configuration glitches or operating system limitations. So, those problems can be fixed easily by tweaking configuration files. However, sometimes we may face problems that cannot be solved directly or we may not even be able to identify them by simply looking at the log files.

By default, Squid only logs the essential information to cache.log. To inspect or debug problems, we need to increase the verbosity of the logs so that Squid can tell us more about the actions it's taking, which may help us find the source of the problem. We can extract information from Squid about its actions at our convenience by using the debug_options directive in the Squid configuration file.

Let's have a look at the format of the debug_options directive:

debug_options rotate=N section,verbosity [section,verbosity]...

The parameter rotate (rotate=N) specifies the number of cache.log files that will be maintained when Squid logs...