Squid: The Definitive Guide

Dedication; Preface; About This Book; Recommended Reading; Conventions Used in This Book; Comments and Questions; Acknowledgments; Chapter 1: Introduction; 1.1 Web Caching; 1.2 A Brief History of Squid; 1.3 Hardware and Operating System Requirements; 1.4 Squid Is Open Source; 1.5 Squid's Home on the Web; 1.6 Getting Help; 1.7 Getting Started with Squid; 1.8 Exercises; Chapter 2: Getting Squid; 2.1 Versions and Releases; 2.2 Use the Source, Luke; 2.3 Precompiled Binaries; 2.4 Anonymous CVS; 2.5 devel.squid-cache.org; 2.6 Exercises; Chapter 3: Compiling and Installing; 3.1 Before You Start; 3.2 Unpacking the Source; 3.3 Pretuning Your Kernel; 3.4 The configure Script; 3.5 make; 3.6 make Install; 3.7 Applying a Patch; 3.8 Running configure Later; 3.9 Exercises; Chapter 4: Configuration Guide for the Eager; 4.1 The squid.conf Syntax; 4.2 User IDs; 4.3 Port Numbers; 4.4 Log File Pathnames; 4.5 Access Controls; 4.6 Visible Hostname; 4.7 Administrative Contact Information; 4.8 Next Steps; 4.9 Exercises; Chapter 5: Running Squid; 5.1 Squid Command-Line Options; 5.2 Check Your Configuration File for Errors; 5.3 Initializing Cache Directories; 5.4 Testing Squid in a Terminal Window; 5.5 Running Squid as a Daemon Process; 5.6 Boot Scripts; 5.7 A chroot Environment; 5.8 Stopping Squid; 5.9 Reconfiguring a Running Squid Process; 5.10 Rotating the Log Files; 5.11 Exercises; Chapter 6: All About Access Controls; 6.1 Access Control Elements; 6.2 Access Control Rules; 6.3 Common Scenarios; 6.4 Testing Access Controls; 6.5 Exercises; Chapter 7: Disk Cache Basics; 7.1 The cache_dir Directive; 7.2 Disk Space Watermarks; 7.3 Object Size Limits; 7.4 Allocating Objects to Cache Directories; 7.5 Replacement Policies; 7.6 Removing Cached Objects; 7.7 refresh_pattern; 7.8 Exercises; Chapter 8: Advanced Disk Cache Topics; 8.1 Do I Have a Disk I/O Bottleneck?; 8.2 Filesystem Tuning Options; 8.3 Alternative Filesystems; 8.4 The aufs Storage Scheme; 8.5 The diskd Storage Scheme; 8.6 The coss Storage Scheme; 8.7 The null Storage Scheme; 8.8 Which Is Best for Me?; 8.9 Exercises; Chapter 9: Interception Caching; 9.1 How It Works; 9.2 Why (Not) Intercept?; 9.3 The Network Device; 9.4 Operating System Tweaks; 9.5 Configure Squid; 9.6 Debugging Problems; 9.7 Exercises; Chapter 10: Talking to Other Squids; 10.1 Some Terminology; 10.2 Why (Not) Use a Hierarchy?; 10.3 Telling Squid About Your Neighbors; 10.4 Restricting Requests to Neighbors; 10.5 The Network Measurement Database; 10.6 Internet Cache Protocol; 10.7 Cache Digests; 10.8 Hypertext Caching Protocol; 10.9 Cache Array Routing Protocol; 10.10 Putting It All Together; 10.11 How Do I ...; 10.12 Exercises; Chapter 11: Redirectors; 11.1 The Redirector Interface; 11.2 Some Sample Redirectors; 11.3 The Redirector Pool; 11.4 Configuring Squid; 11.5 Popular Redirectors; 11.6 Exercises; Chapter 12: Authentication Helpers; 12.1 Configuring Squid; 12.2 HTTP Basic Authentication; 12.3 HTTP Digest Authentication; 12.4 Microsoft NTLM Authentication; 12.5 External ACLs; 12.6 Exercises; Chapter 13: Log Files; 13.1 cache.log; 13.2 access.log; 13.3 store.log; 13.4 referer.log; 13.5 useragent.log; 13.6 swap.state; 13.7 Rotating the Log Files; 13.8 Privacy and Security; 13.9 Exercises; Chapter 14: Monitoring Squid; 14.1 cache.log Warnings; 14.2 The Cache Manager; 14.3 Using SNMP; 14.4 Exercises; Chapter 15: Server Accelerator Mode; 15.1 Overview; 15.2 Configuring Squid; 15.3 Gee, That Was Confusing!; 15.4 Access Controls; 15.5 Content Negotiation; 15.6 Gotchas; 15.7 Exercises; Chapter 16: Debugging and Troubleshooting; 16.1 Some Common Problems; 16.2 Debugging via cache.log; 16.3 Core Dumps, Assertions, and Stack Traces; 16.4 Replicating Problems; 16.5 Reporting a Bug; 16.6 Exercises; Appendix A: Config File Reference; Appendix B: The Memory Cache; Appendix C: Delay Pools; C.1 Overview; C.2 Configuring Squid; C.3 Examples; C.4 Issues; C.5 Monitoring Delay Pools; Appendix D: Filesystem Performance Benchmarks; D.1 The Benchmark Environment; D.2 General Comments; D.3 Linux; D.4 FreeBSD; D.5 OpenBSD; D.6 NetBSD; D.7 Solaris; D.8 Number of Disk Spindles; Appendix E: Squid on Windows; E.1 Cygwin; E.2 SquidNT; Appendix F: Configuring Squid Clients; F.1 Manually; F.2 Proxy Auto-Configuration; F.3 WPAD; F.4 Summary; Colophon;