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ccna book online purchase.The CiscoEasyVPN Server enables location-agnostic staff and remote workers to use VPN client software on their PCs to create secure IPSec tunnel access to the headquarters intranet where critical data and applications exist. It enables Cisco IOS routers and CiscoASA firewalls to act as VPN front-end devices in site-to-site or remote access VPNs. The remote office device connects to the server using the CiscoEasy VPN remote feature or the CiscoVPN client application, which in turn pushes a Si-defined security policy to the remote VPN device. This ensures that the latest policies are in place on those connections before the connection is established.CiscoEasyVPN Remote enables a CiscoIOS router or software client to act as a remote VPN client. These devices can receive security policies from a CiscoEasyVPN server, minimizing the need for VPN configuration at remote locations. This cost-effective solution is ideal for two scenarios: remote offices with little to no IT support or large Customer PremisesEquipment (CPE) deployments where it is impractical to configure multiple remote devices individually.8.6.4.3 Cisco Easy VPN Connection StepsNegotiation to protect VPN security occurs when a client connects to a server. Step 1 The VPN client initiates the IKE Phase 1 process. If a pre-shared key is used for authentication, the VPN client initiates active mode. If a digital certificate is used for authentication, the VPN client initiates the primary mode. Step 2 The VPN client establishes an ISAKMPSA. to reduce the amount of manual configuration on the VPN client, the EasyVPNISAKMP proposal contains various combinations of encryption and hashing algorithms, authentication methods, and DH group sizes. Step 3 The EasyVPN server accepts the SA offer. The ISAKMP policy can contain several offers, but the EasyVPN server uses the first match it finds, so it always configures the most secure policy first. At this point, device authentication ends and user authentication begins.Step 4 The Easy VPN server initiates a username and password challenge. The information entered is checked by the authentication entity using Authentication, Authorization and Accounting (AAA) protocols, such as RADIUS and TACACS+. Token cards can also be used through AAA proxies. The VPN device configured to handle remote VPN clients should always enforce user authentication.Step 5 The mode configuration process is initialized. The remaining system parameters (IP address, DNS, split tunnel properties, etc.) are pushed to the VPN client at this point using the schema configuration.250 Chapter 8 Implementing a Virtual Private NetworkStep 6 The reverse route injection ( ReverseRouteInjection,RR1) process is initialized. The RRI ensures that a static route is created on the CiscoEasyVPN server for each VPN client's internal IP address. Step 7 IPSec fast mode completes the connection. The connection is complete when the IPSec SA creation is complete.8.6.5 Configuring the VPN Server Using CCP8.6.5.1 CCP Tasks for the Cisco EasyVPN Server