Table of Contents



•	Table of Contents
•	Index
•	Reviews
•	Reader Reviews
•	Errata
•	Academic

Squid: The Definitive Guide
By Duane Wessels

Publisher	: O'Reilly
Pub Date	: January 2004
ISBN	: 0-596-00162-2
Pages	: 496

About This Book

Recommended Reading

Conventions Used in This Book

Comments and Questions

Acknowledgments

Chapter 1. Introduction

Section 1.1. Web Caching

Section 1.2. A Brief History of Squid

Section 1.3. Hardware and Operating System Requirements

Section 1.4. Squid Is Open Source

Section 1.5. Squid's Home on the Web

Section 1.6. Getting Help

Section 1.7. Getting Started with Squid

Section 1.8. Exercises

Chapter 2. Getting Squid

Section 2.1. Versions and Releases

Section 2.2. Use the Source, Luke

Section 2.3. Precompiled Binaries

Section 2.4. Anonymous CVS

Section 2.5. devel.squid-cache.org

Section 2.6. Exercises

Chapter 3. Compiling and Installing

Section 3.1. Before You Start

Section 3.2. Unpacking the Source

Section 3.3. Pretuning Your Kernel

Section 3.4. The configure Script

Section 3.5. make

Section 3.6. make Install

Section 3.7. Applying a Patch

Section 3.8. Running configure Later

Section 3.9. Exercises

Chapter 4. Configuration Guide for the Eager

Section 4.1. The squid.conf Syntax

Section 4.2. User IDs

Section 4.3. Port Numbers

Section 4.4. Log File Pathnames

Section 4.5. Access Controls

Section 4.6. Visible Hostname

Section 4.7. Administrative Contact Information

Section 4.8. Next Steps

Section 4.9. Exercises

Chapter 5. Running Squid

Section 5.1. Squid Command-Line Options

Section 5.2. Check Your Configuration File for Errors

Section 5.3. Initializing Cache Directories

Section 5.4. Testing Squid in a Terminal Window

Section 5.5. Running Squid as a Daemon Process

Section 5.6. Boot Scripts

Section 5.7. A chroot Environment

Section 5.8. Stopping Squid

Section 5.9. Reconfiguring a Running Squid Process

Section 5.10. Rotating the Log Files

Section 5.11. Exercises

Chapter 6. All About Access Controls

Section 6.1. Access Control Elements

Section 6.2. Access Control Rules

Section 6.3. Common Scenarios

Section 6.4. Testing Access Controls

Section 6.5. Exercises

Chapter 7. Disk Cache Basics

Section 7.1. The cache_dir Directive

Section 7.2. Disk Space Watermarks

Section 7.3. Object Size Limits

Section 7.4. Allocating Objects to Cache Directories

Section 7.5. Replacement Policies

Section 7.6. Removing Cached Objects

Section 7.7. refresh_pattern

Section 7.8. Exercises

Chapter 8. Advanced Disk Cache Topics

Section 8.1. Do I Have a Disk I/O Bottleneck?

Section 8.2. Filesystem Tuning Options

Section 8.3. Alternative Filesystems

Section 8.4. The aufs Storage Scheme

Section 8.5. The diskd Storage Scheme

Section 8.6. The coss Storage Scheme

Section 8.7. The null Storage Scheme

Section 8.8. Which Is Best for Me?

Section 8.9. Exercises

Chapter 9. Interception Caching

Section 9.1. How It Works

Section 9.2. Why (Not) Intercept?

Section 9.3. The Network Device

Section 9.4. Operating System Tweaks

Section 9.5. Configure Squid

Section 9.6. Debugging Problems

Section 9.7. Exercises

Chapter 10. Talking to Other Squids

Section 10.1. Some Terminology

Section 10.2. Why (Not) Use a Hierarchy?

Section 10.3. Telling Squid About Your Neighbors

Section 10.4. Restricting Requests to Neighbors

Section 10.5. The Network Measurement Database

Section 10.6. Internet Cache Protocol

Section 10.7. Cache Digests

Section 10.8. Hypertext Caching Protocol

Section 10.9. Cache Array Routing Protocol

Section 10.10. Putting It All Together

Section 10.11. How Do I ...

Section 10.12. Exercises

Chapter 11. Redirectors

Section 11.1. The Redirector Interface

Section 11.2. Some Sample Redirectors

Section 11.3. The Redirector Pool

Section 11.4. Configuring Squid

Section 11.5. Popular Redirectors

Section 11.6. Exercises

Chapter 12. Authentication Helpers

Section 12.1. Configuring Squid

Section 12.2. HTTP Basic Authentication

Section 12.3. HTTP Digest Authentication

Section 12.4. Microsoft NTLM Authentication

Section 12.5. External ACLs

Section 12.6. Exercises

Chapter 13. Log Files

Section 13.1. cache.log

Section 13.2. access.log

Section 13.3. store.log

Section 13.4. referer.log

Section 13.5. useragent.log

Section 13.6. swap.state

Section 13.7. Rotating the Log Files

Section 13.8. Privacy and Security

Section 13.9. Exercises

Chapter 14. Monitoring Squid

Section 14.1. cache.log Warnings

Section 14.2. The Cache Manager

Section 14.3. Using SNMP

Section 14.4. Exercises

Chapter 15. Server Accelerator Mode

Section 15.1. Overview

Section 15.2. Configuring Squid

Section 15.3. Gee, That Was Confusing!

Section 15.4. Access Controls

Section 15.5. Content Negotiation

Section 15.6. Gotchas

Section 15.7. Exercises

Chapter 16. Debugging and Troubleshooting

Section 16.1. Some Common Problems

Section 16.2. Debugging via cache.log

Section 16.3. Core Dumps, Assertions, and Stack Traces

Section 16.4. Replicating Problems

Section 16.5. Reporting a Bug

Section 16.6. Exercises

Appendix A. Config File Reference

ssl_unclean_shutdown

udp_incoming_address

udp_outgoing_address

cache_peer_domain

neighbor_type_domain

icp_query_timeout

maximum_icp_query_timeout

mcast_icp_query_timeout

dead_peer_timeout

hierarchy_stoplist

cache_access_log

cache_store_log

emulate_httpd_log

log_ip_on_direct

cache_swap_high

maximum_object_size

minimum_object_size

maximum_object_size_in_memory

cache_replacement_policy

memory_replacement_policy

store_dir_select_algorithm

ftp_sanitycheck

cache_dns_program

dns_retransmit_interval

dns_nameservers

unlinkd_program

redirect_program

redirect_children

redirect_rewrites_host_header

redirector_access

redirector_bypass

authenticate_ttl

authenticate_cache_garbage_interval

authenticate_ip_ttl

external_acl_type

wais_relay_host

wais_relay_port

request_header_max_size

request_body_max_size

refresh_pattern

quick_abort_min

quick_abort_max

quick_abort_pct

positive_dns_ttl

negative_dns_ttl

range_offset_limit

connect_timeout

peer_connect_timeout

request_timeout

persistent_request_timeout

client_lifetime

half_closed_clients

shutdown_lifetime

http_reply_access

cache_peer_access

ident_lookup_access

tcp_outgoing_tos

tcp_outgoing_address

reply_body_max_size

cache_effective_user

cache_effective_group

visible_hostname

unique_hostname

hostname_aliases

announce_period

httpd_accel_host

httpd_accel_port

httpd_accel_single_host

httpd_accel_with_proxy

httpd_accel_uses_host_header

tcp_recv_bufsize

memory_pools_limit

log_icp_queries

minimum_direct_hops

minimum_direct_rtt

cachemgr_passwd

store_avg_object_size

store_objects_per_bucket

netdb_ping_period

test_reachability

reload_into_ims

error_directory

maximum_single_addr_tries

snmp_incoming_address

snmp_outgoing_address

as_whois_server

wccp_incoming_address

wccp_outgoing_address

delay_parameters

delay_initial_bucket_level

incoming_icp_average

incoming_http_average

incoming_dns_average

min_icp_poll_cnt

min_dns_poll_cnt

min_http_poll_cnt

max_open_disk_fds

mcast_miss_addr

mcast_miss_port

mcast_miss_encode_key

nonhierarchical_direct

strip_query_terms

ignore_unknown_nameservers

digest_generation

digest_bits_per_entry

digest_rebuild_period

digest_rewrite_period

digest_swapout_chunk_size

digest_rebuild_chunk_percentage

client_persistent_connections

server_persistent_connections

pipeline_prefetch

extension_methods

request_entities

high_response_time_warning

high_page_fault_warning

high_memory_warning

vary_ignore_expire

sleep_after_fork

Appendix B. The Memory Cache

Appendix C. Delay Pools

Section C.1. Overview

Section C.2. Configuring Squid

Section C.3. Examples

Section C.4. Issues

Section C.5. Monitoring Delay Pools

Appendix D. Filesystem Performance Benchmarks

Section D.1. The Benchmark Environment

Section D.2. General Comments

Section D.3. Linux

Section D.4. FreeBSD

Section D.5. OpenBSD

Section D.6. NetBSD

Section D.7. Solaris

Section D.8. Number of Disk Spindles

Appendix E. Squid on Windows

Section E.1. Cygwin

Section E.2. SquidNT

Appendix F. Configuring Squid Clients

Section F.1. Manually

Section F.2. Proxy Auto-Configuration

Section F.3. WPAD

Section F.4. Summary