Practical Firewalls enables you to get a thorough understanding of all of the basic concepts involved in creating and maintaining a firewall. Aimed at beginning to intermediate network administrators, this book presents information in a manner so that you do not need a large background in the networking field. It provides "real world" methods, problems and solutions of value to you as a user. After reading this book, you will go away with a good understanding of firewall security policies, firewall design strategies, hardware specifications/requirements/variations, software/firewall tools, VPN and Tunneling, monitoring and auditing techniques, and IP chains.