Microsoft® Exchange Server 2003 Administrator's Companion

Chapter 24. Exchange Server Security

• The Scope of Security

• Motivations of an Attacker

• How Hackers Work

• Physical Security

• Administrative Security

• SMTP Security

• Computer Viruses

• Junk E-Mail

• Summary

In July of 2000, Information Week stated that "The bill to 50,000 US firms this year for viruses and computer hacking will amount to $266 billion, or 2.5 percent of USA’s GDP." These numbers are only going up. Security has become so central to the administrator’s role that we’ve decided to devote a large portion of this book to discussing it.

In this chapter, we offer ideas about how to add complexity and create hindrances to those who wish to attack your network over port 25. Unfortunately, when attempting to secure your system, you must accept the 80 percent ...