Proxy servers are critical to the success of virtually every large Web and intranet site -- but until this book, optimizing them was a "black art". Now, one of the world's leading proxy server experts explains the technology in depth -- and shows exactly how to make the most of it in any environment. Understand the basic architecture of proxy servers, and the differences between firewall proxy servers, departmental, personal and specialized proxies. Review critical, proxy-server related protocols, including HTTP, cookies, the Internet cache protocol, and LDAP. Understand proxy server caching in unprecedented depth, including the special issues that arise in Web-based advertising. Review performance issues, especially sizing and load balancing; and take a close look at proxy server security. Finally, understand the different configuration issues at work in extranets, virtual private networks, and "DNS-deprived" environments. This is a must-have resource for all Web administrators and network managers who want to improve bandwidth and security.