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ccna book online buy.Before a CiscoIOS router can implement SSLVPN services, the current environment must be analyzed to determine which features and patterns might be useful in the implementation. There are many factors to consider when designing SSLVPN. User connectivity One-by-one determine whether the user is connecting to the corporate network from a public shared computer, such as from a computer in a library or an Internet cafe. In this case, use the clientless SSLVPN mode.Router Features - CiscoIOS routers can run a variety of features such as IPSecVPN tunnels, routing engines, and firewall processes. If the router is already running a certain number of features, enabling the SSLVPN feature will obviously place a considerable load on it.Router hardware - SSLVPN processes can be a significant CPU and memory hog. Before implementing SSLVPN on a Cisco 10S router, confirm that a hardware-accelerated SSL VPN engine is used, such as AIM-VPN/SSL-1, AIM-VPN/SSL-2> AIM-VPN/SSL-3. Information on the SSLVPN hardware module is available at www.cisco.com.Architecture Planning - It is important to consider the location of the VPN termination device. Before implementing SSLVPN features for CiscoIOS. answer the following questions: should SSLVPN be placed behind a firewall? If so, which port needs to be open? Should the decrypted traffic be transmitted through another set of firewalls? If so, which port needs to be allowed?Implementation Scope - The network security administrator needs to determine the size of the SSLVPN deployment, especially the number of concurrent users that will gain access to the network. If a single Cisco I0S router is not sufficient to support the required number of users. you must consider using a traditional load splitter or server clustering solution to accommodate all potential remote users.SSLVPN is a viable option for many organizations, but the configuration of SSLVPN is beyond the scope of this book. Visit www.cisco.com for the required configuration commands for SSLVPN and to download the reference guide.8.6.4 CiscoEasyVPN8.6.4.1 Introduction to Cisco Easy VPNWhile SSLVPN is useful in many situations, there are also many applications that require the security of an IPSecVPN connection for authentication and data encryption. Establishing a VPN connection between two sites can be complex and often requires network administrators at each site to collaboratively configure VPN parameters. Ease of deployment is critical when deploying VPNs for remote workers and small branch offices that lack the technical resources to configure VPNs on remote routers.CiscoEasyVPN solution features provide flexibility, scalability, and ease of use for site-to-site and remote access VPNs. It consists of three components.