Chapter 16: Configuring Cisco Easy VPN

Easy VPN modes:

• Client - NAT/PAT is used to enable remote hosts to use a separate IP space
• Network Extension - Server IP space is extended through the tunnel to the remote network
• Network Extension Plus - Network extension mode with the added capability of issuing an IP address to the remote for use on a loopback interface

Easy VPN connection establishment:

1. IKE phase 1
2. Establishing an ISAKMP SA
3. SA proposal acceptance
4. Easy VPN user authentication
5. Mode configuration
6. Reverse route injection
7. IPsec quick mode