A VPN connections use 1) Encapsulation 2) Authentication, and 3) Data encryption. TCP/IP packets) is wrapped around by using encapsulation protocol such as GRE, IPsec, L2F, PPTP, or L2TP.The encapsulated data packets are again wrapped inside carrier protocol packet, and then routed across the public network.
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The software has a GUI based designer that allows drag-n-drop functionality for designing one’s own network.
Several labs on HSRP, and site-to-site VPN have been added for hands-on practice.
For this purpose, one needs to configure AAA (Authentication, Authorization, and Accounting), so that one needs to authenticate to access any resources at the other end of the VPN tunnel to restrict user access.
Remote access VPN is typically used with home and mobile users to connect to the corporate office.
In Site-to-site VPN, a secure tunnel is formed between two peers within the communication channel.
An example configuration scenario is shown in the figure below: As may seen in the exhibit, the VPN is configured between two routers.
VPN (Virtual Private Network) is widely used these days for security and confidentiality of communication between hosts.
The two main types of VPN are Site-to-site VPN and Remote-to-Site VPN.
For example, a mobile traveler can connect to the Corporate head quarters using his laptop computer securely using a public Wi-Fi connection. In remote access VPN, usually, a client is installed on the remote user’s computer.