Cisco Systems. Securing Networks with Cisco Routers and Switches. Volume 2. Student Guide

Cisco Systems, 2007. — 364 p.In the current business environment, it is critical that corporate networks connected to the Internet offer flexible and secure virtual private network (VPN) access with IP Security (IPsec). Connecting remote sites over the Internet provides a great cost-saving opportunity when compared to the traditional WAN access such as Frame Relay or ATM. With IPsec technology, customers now can build VPNs over the Internet with the security of encryption protection against wire taping or intruding on the private communication. In this lesson, you will be introduced to RFC 2401, Security Architecture for the Internet Protocol (defining IPsec), some of the underlying protocols used by IPsec, and the tasks involved with configuration of IPsec on a router.