Squid: The Definitive Guide

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by: Martin Brooks & Duane Wessels

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On-line Price: $57.95 (includes GST) Paperback package 464 20%Off Retail Price You save: $15.00 _____________________ N.Sydney : On Order (reserve your copy)	Retail Price: $72.95 Publisher: O'REILLY,2004/02/28 Category: Level: ISBN: 0596001622 ISBN13: 9780596001629
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Full Description

Squid is the most popular Web caching software in use today, and it works on a variety of platforms including Linux, FreeBSD, and Windows. Squid improves network performance by reducing the amount of bandwidth used when surfing the Web. It makes web pages load faster and can even reduce the load on your web server. By caching and reusing popular web content, Squid allows you to get by with smaller network connections. It also protects the host on your internal network by acting as a firewall and proxying your internal web traffic. You can use Squid to collect statistics about the traffic on your network, prevent users from visiting inappropriate web sites at work or school, ensure that only authorized users can surf the Internet, and enhance your privacy by filtering sensitive information from web requests. Companies, schools, libraries, and organizations that use web-caching proxies can look forward to a multitude of benefits.

  Written by Duane Wessels, the creator of Squid, Squid: The Definitive Guide will help you configure and tune Squid for your particular situation. Newcomers to Squid will learn how to download, compile, and install code. Seasoned users of Squid will be interested in the later chapters, which tackle advanced topics such as high-performance storage options, rewriting requests, HTTP server acceleration, monitoring, debugging, and troubleshooting Squid.

  Topics covered include:

      Compiling and installing Squid

  Running Squid

  Using Squid's sophisticated access controls

  Tuning disk storage for optimal performance

  Configuring your operating system for HTTP interception

  Forwarding Requests to other web caches

  Using redirectors to rewrite user requests

  Monitoring Squid with the cache manager and SNMP

  Using Squid to accelerate and protect HTTP servers

  Managing bandwidth consumption with Delay Pools

Table of Contents

Preface

  1. Introduction

          Web Caching

          A Brief History of Squid

          Hardware and Operating System Requirements

          Squid Is Open Source

          Squid's Home on the Web

          Getting Help

          Getting Started with Squid

          Exercises

  2. Getting Squid

          Versions and Releases

          Use the Source, Luke

          Precompiled Binaries

          Anonymous CVS

          devel.squid-cache.org

          Exercises

  3. Compiling and Installing

          Before You Start

          Unpacking the Source

          Pretuning Your Kernel

          The configure Script

          make

          make Install

          Applying a Patch

          Running configure Later

          Exercises

  4. Configuration Guide for the Eager

          The squid.conf Syntax

          User IDs

          Port Numbers

          Log File Pathnames

          Access Controls

          Visible Hostname

          Administrative Contact Information

          Next Steps

          Exercises

  5. Running Squid

          Squid Command-Line Options

          Check Your Configuration File for Errors

          Initializing Cache Directories

          Testing Squid in a Terminal Window

          Running Squid as a Daemon Process

          Boot Scripts

          A chroot Environment

          Stopping Squid

          Reconfiguring a Running Squid Process

          Rotating the Log Files

          Exercises

  6. All About Access Controls

          Access Control Elements

          Access Control Rules

          Common Scenarios

          Testing Access Controls

          Exercises

  7. Disk Cache Basics

          The cache--dir Directive

          Disk Space Watermarks

          Object Size Limits

          Allocating Objects to Cache Directories

          Replacement Policies

          Removing Cached Objects

          refresh--pattern

          Exercises

  8. Advanced Disk Cache Topics

          Do I Have a Disk I/O Bottleneck?

          Filesystem Tuning Options

          Alternative Filesystems

          The aufs Storage Scheme

          The diskd Storage Scheme

          The coss Storage Scheme

          The null Storage Scheme

          Which Is Best for Me?

          Exercises

  9. Interception Caching

          How It Works

          Why (Not) Intercept?

          The Network Device

          Operating System Tweaks

          Configure Squid

          Debugging Problems

          Exercises

  10. Talking to Other Squids

          Some Terminology

          Why (Not) Use a Hierarchy?

          Telling Squid About Your Neighbors

          Restricting Requests to Neighbors

          The Network Measurement Database

          Internet Cache Protocol

          Cache Digests

          Hypertext Caching Protocol

          Cache Array Routing Protocol

          Putting It All Together

          How Do I ...

          Exercises

  11. Redirectors

          The Redirector Interface

          Some Sample Redirectors

          The Redirector Pool

          Configuring Squid

          Popular Redirectors

          Exercises

  12. Authentication Helpers

          Configuring Squid

          HTTP Basic Authentication

          HTTP Digest Authentication

          Microsoft NTLM Authentication

          External ACLs

          Exercises

  13. Log Files

          cache.log

          access.log

          store.log

          referer.log

          useragent.log

          swap.state

          Rotating the Log Files

          Privacy and Security

          Exercises

  14. Monitoring Squid

          cache.log Warnings

          The Cache Manager

          Using SNMP

          Exercises

  15. Server Accelerator Mode

          Overview

          Configuring Squid

          Gee, That Was Confusing!

          Access Controls

          Content Negotiation

          Gotchas

          Exercises

  16. Debugging and Troubleshooting

          Some Common Problems

          Debugging via cache.log

          Core Dumps, Assertions, and Stack Traces

          Replicating Problems

          Reporting a Bug

          Exercises

  A. Config File Reference

  B. The Memory Cache

  C. Delay Pools

  D. Filesystem Performance Benchmarks

  E. Squid on Windows

  F. Configuring Squid Clients

  Index