IPSec base virtual private network

The Internet evolved from an experiential packet-switching network called the ARPANET. This network has grown exponentially since its conversion from an experimental to an operational network in 1975. However, the need for confidential and secure data channel has dissuaded many enterprises from using this ubiquitous public infrastructure. The IPSec protocol suite developed by the Internet Engineering Task Force (IETF) makes it possible to implement secure communication channels or virtual private network (VPN) over the Internet. Corporations can benefit from substantial financial savings by utilizing VPN for inter-company or intra-company communications rather than using expensive lease or privately own network infrastructure with its associated high maintenance costs. In this thesis, we will discuss the architecture, design and use of IPSec base VPN