TABLE OF CONTENTS Generally, when you think of perimeter security, you think of protecting the outer edges of your network. Hence, the term perimeter. Home computers and small office/home office (SOHO) networks typically have some form of firewall in place; this could be a cable router, wireless access point, or switch. Some people think that the perimeter security starts with the Windows Firewall or other firewall located on the computer. If you are thinking that can t be a perimeter security measure, you are wrong.Think about a laptop on a wireless broadband card from Verizon. What is the first point of security? The software on the computer is the right answer.
In this chapter we will take a look at some different aspects of the perimeter security and how they work. We also discuss some ideas that maybe you would have not thought of for security.
In ancient civilizations, entire towns or villages were surrounded by some form of protection possibly a tall wall or a deep moat, or both to keep unwanted guests from entering. Guards would man the entrances and bark out who goes there? If the party entering was known or had the right password or sufficient credentials to gain access, the moat bridge or fortress wall was opened up to allow him or her to enter.
If this form of defense were 100 percent effective, there would be no need for any sort of security or law enforcement within the confines of...
