CHAPTER 27 Network Address Translation
What You Will Learn
In this chapter, you will learn how NAT (originally used to address the shortage of IPv4 addresses) is now used to conceal public IPv4 addresses. We’ll talk about the advantages and disadvantages of using NAT for this purpose.
You will learn that there are four types of NAT and find that using NAT for security is not the best use of NAT. We’ll also configure the popular NATP and see how and where the IPv4 addresses on the Illustrated Network are translated.
This chapter deals with a common TCP/IP practice, network address translation (NAT). NAT is used to conceal the true public IPv4 addresses of a device by using substitute IPv4 addresses in packet headers. NAT is usually performed ...