Network Security Principles and Practices

Summary

This chapter discussed in detail the workings and implementation of the IPsec protocol. IPsec is fast becoming the de facto VPN standard for the industry. The various ways it can be implemented to suit customer needs are aiding its popularity. We discussed in detail how the three main protocols in IPsec function. In addition, we looked at the authentication mechanism employed by IKE and how encryption and integrity checking in IPsec take place. It is important to look at the case studies presented in this chapter in light of the explanations given for the functioning of IKE and the other protocols in IPsec. You saw some of the most common scenarios in which IPsec is deployed. Because IPsec is becoming very widely deployed, its high availability, ...