Implementing Cisco IOS Network Security (IINS 640-554) Foundation Learning Guide, Second Edition

Chapter 9. Firewall Fundamentals and Network Address Translation

This chapter teaches firewall concepts, technologies, and design principles. At the end of this chapter, you will be able to do the following:

• Explain the operations of the different types of firewall technologies

• Describe firewall technologies that historically have played, and still play, a role in network access control and security architectures

• Introduce and describe the function and building blocks of Network Address Translation

• List design considerations for firewall deployment

• Describe guidelines for firewall ruleset creation

Introducing Firewall Technologies

A firewall protects network devices from intentional, hostile intrusions that could threaten information ...