This chapter explores the usage of reverse proxies, adding additional layers of caching to your web infrastructure. It explains how this improves both performance and scalability. It then looks at several specific reverse proxy options, and their configurations, including Squid, Varnish, and Apache's mod_proxy.

1. Reverse Proxy Architecture
2. The Benefits Of Reverse Proxies
   1. Performance
   2. Scalability
   3. Layered Caching
3. Selecting and Configuring a Reverse Proxy
   1. Squid
   2. Varnish
   3. Apache and mod_proxy