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Squid Proxy Server 3.1: Beginner's Guide

You're reading from   Squid Proxy Server 3.1: Beginner's Guide Reduce bandwidth use and deliver your most frequently requested web pages more quickly with Squid Proxy Server. This guide will introduce you to the fundamentals of the caching system and help you get the most from Squid.

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Product type Paperback
Published in Feb 2011
Publisher Packt
ISBN-13 9781849513906
Length 332 pages
Edition 1st Edition
Languages
Concepts
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Table of Contents (20) Chapters Close

Squid Proxy Server 3.1 Beginner's Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
1. Getting Started with Squid 2. Configuring Squid FREE CHAPTER 3. Running Squid 4. Getting Started with Squid's Powerful ACLs and Access Rules 5. Understanding Log Files and Log Formats 6. Managing Squid and Monitoring Traffic 7. Protecting your Squid Proxy Server with Authentication 8. Building a Hierarchy of Squid Caches 9. Squid in Reverse Proxy Mode 10. Squid in Intercept Mode 11. Writing URL Redirectors and Rewriters 12. Troubleshooting Squid Pop Quiz Answers Index

Problems with interception caching


Although interception caching is attractive and there are a few advantages as well, it has got some serious disadvantages, which can make it painful to manage or debug if something goes wrong. Let's have a look at a few disadvantages of interception caching:

Violates TCP/IP standards

The routers or switches in a network are supposed to forward packets to the hosts to which they are destined. Diverting packets to proxy servers violates the TCP/IP standards. Also, the proxy server accepts TCP/IP packets which are not destined for it, which is another violation of the TCP/IP standards.

The proxy server often has a different OS to the client, which confuses the end-to-end packet management outside of the HTTP packets. Which in turn can cause servers and the remote networks to become completely inaccessible or the transfer rates may drop down considerably.

Susceptible to routing problems

Interception caching relies on stable routed paths and the diversion of the...

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