This chapter covers the following topics:
- The Difficulties of Secure Networking
- Security Technologies
- Emerging Security Technologies
Technology . . . is a queer thing. It brings you great gifts with one hand, and it stabs you in the back with the other.
C. P. Snow, New York Times, March 15, 1971
L0pht, making the theoretical practical since 1992.
L0pht Heavy Industries
Chapter 3 discussed secure networking threats. This chapter focuses on the broad technologies that can mitigate those threats. The technologies discussed here can be considered foundation technologies for network security and include firewalls, intrusion detection systems (IDS), identity systems, and encryption.
This chapter follows the same format as Chapter 3. In each technology discussion, a table first summarizes several of the technology's key attributes. This isn't meant to be a detailed description of each technology. The focus is on discussing design trade-offs and implementation issues as opposed to giving a thorough overview of the technology.
Standalone security technologies are only a piece of the puzzle. As I've hinted through the first three chapters, a multitude of features, management techniques, and design options affect security. The rest of the book discusses these techniques; in this chapter, I want to discuss the basic technologies in one place because we will refer to them throughout the book.
Part I. Network Security Foundations
Network Security Axioms
Security Policy and Operations Life Cycle
Secure Networking Threats
Network Security Technologies
Part II. Designing Secure Networks
General Design Considerations
Network Security Platform Options and Best Deployment Practices
Common Application Design Considerations
Identity Design Considerations
IPsec VPN Design Considerations
Supporting-Technology Design Considerations
Designing Your Security System
Part III. Secure Network Designs
Edge Security Design
Campus Security Design
Teleworker Security Design
Part IV. Network Management, Case Studies, and Conclusions
Secure Network Management and Network Security Management
Appendix A. Glossary of Terms
Appendix B. Answers to Applied Knowledge Questions
Appendix C. Sample Security Policies
INFOSEC Acceptable Use Policy
Guidelines on Antivirus Process