International Journal of Engineering Sciences & Research Technology (IJESRT)
In this paper, the authors describe methods for implementing Virtual Private Networks (VPN) with IP Security (IPSec). A Virtual Private Network (VPN) is a technology for using the Internet or another intermediate network to connect computers to isolated remote computer networks. The Internet Protocol security (IPsec) standard provides a method to manage authentication and data protection between multiple crypto peers engaging in secure data transfer. The Authentication Header (AH) provides integrity and authentication for IP datagram's. ESP provides data confidentiality, integrity, and authentication.