Chapter 1. Network Security—Yesterday, Today, and Tomorrow
This chapter includes the following topics:
• Proxy Versus Stateful Inspection
• From Proxy to Stateful Inspection—and Back Again
The firewall is where our discussion about next-generation security for the Web 2.0 world—and beyond—begins. The modern firewall is the primary tool used by corporations to enforce security policies in the network. As we examine the security technologies that will enable us to secure the emerging “borderless network,” it is useful to have an understanding of how firewalls have evolved.
When the Internet became widely available in the 1990s, information technology (IT) organizations were focused on ensuring and enhancing connectivity ...
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