Chapter 1. Firewalls and Network Security

This chapter covers the following topics: Security is a must. But where to start? Firewalls and domains of trust Firewall insertion in the network topology Main categories of network firewalls The evolution of stateful firewalls What type of stateful firewall? Classic topologies using stateful firewalls Stateful firewalls and security design

“In preparing for the battle I have always found that plans are useless, but planning is indispensable”.

—Dwight D. Eisenhower