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Free ebooks
 Operating System Unix Squid: The Definitive Guide Part II
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 Chapter 9, Interception Caching - Here, I explain how to configure Squid for HTTP interception, sometimes also called transparent caching. Actually, configuring Squid is the easy part. The difficulty comes from setting up a router or switch on your network and the host from which Squid is running. I explain how to configure networking equipment from Cisco, Alteon, Foundry, and Extreme. I'll also show you how to configure your operating system (Linux, FreeBSD, NetBSD, OpenBSD, and Solaris) for HTTP interception. Finally, I talk about WCCP.Chapter 10, Talking to Other Squids - In this chapter, I cover the ins and outs of cache cooperation, including meshes, arrays, and hierarchies. You may also find it useful if you simply need to forward requests from Squid to another proxy or intermediary. I'll talk about the various intercache protocols supported by Squid (ICP, HTCP, Cache Digests, and CARP) and how Squid chooses the next-hop location for a given cache miss. Chapter 11, Redirectors - Redirectors are the best way to make Squid rewrite HTTP requests before forwarding them. I describe the interface between Squid and a redirector program so that you can write your own. I also present a few of the more popular third-party redirectors available. Chapter 12, Authentication Helpers - In this chapter, I explain how Squid interfaces with external authentication databases such as LDAP, NT domain controllers, and password files. Squid comes with a number of authentication helpers and understands Basic, Digest, and NTLM authentication credentials. I also document the API for each, in case you want to develop your own helper. Chapter 13, Log Files - I cover Squid's various log files in this chapter, including access.log, store.log, cache.log, and others. I explain what each log file contains and how you should periodically maintain them. Chapter 14, Monitoring Squid - This chapter provides a lot of information on monitoring Squid's operation. I cover both SNMP and Squid's own cache manager interface. You'll find it useful for both long-term monitoring and short-term problem diagnosis. Chapter 15, Server Accelerator Mode - Squid's server accelerator mode is useful in a number of situations. You can use it to boost your origin server's poor performance, as a firewall to protect the server, or even to build your own content delivery network. I show how to set up Squid and make sure that outsiders can't abuse your service. Chapter 16, Debugging and Troubleshooting - The book's final chapter explains how to debug and troubleshoot problems with Squid. You may find that some sites, or some user agents, don't work properly with Squid. I show how to isolate and reproduce the problem and how to present the information to Squid developers for assistance. Download free linux ebook: Squid: The Definitive Guide Part II
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