What is IPSec? What's a VPN? Why do the need each other? Virtual Private Network (VPN) has become one of the most recognized terms in our industry, yet there continuously seems to be different impressions of what VPNs really are and can become. A Technical Guide to IPSec Virtual Private Networks provides a single point of information that represents hundreds or resources and years of experience with IPSec VPN solutions. It cuts through the complexity surrounding IPSec and the idiosyncrasies of design, implementation, operations, and security. Starting with a primer on the IP protocol suite, the book travels layer by layer through the protocols and the technologies that make VPNs possible. It includes security theory, cryptography, RAS, authentication, IKE, IPSec, encapsulation, keys, and policies. After explaining the technologies and their interrelationships, the book provides sections on implementation and product evaluation. A Technical Guide to IPSec Virtual Private Networks arms information security, network, and system engineers and administrators with the knowledge and the methodologies to design and deploy VPNs in the real world for real companies.

Introduction Know the Terrain The Internet TCP/IP Quickie Information Age Security Concepts Cryptography The Other Guys Why are "VPNs" So HOT? IP Security Primer History Structure Applications Quality of Service Policy Encryption Symmetrical Encryption Asymmetrical Encryption Message Authentication Code Perfect Forward Secrecy Diffie-Hellman IPSEC Architecture Domain of Interpretation Security Associations Transport Mode Tunnel Mode Authentication Shared Secret Certificates Public Key Cryptography Non-IPSec Authentication Security Protocols Encapsulating Security Payload Authentication Header Key Management The Roll of Key Management Creating IKE for IPSec Phase One Phase Two Implementation Considerations Network to Network Client to Network Client Interaction Rollout Concepts Product Evaluation Business Drivers Grading Methodology Lab Testing Pilot Processes Trend Analysis