A Virtual Private Network (VPN) can be defined as a way to provide secure communication between members of a group through use of public telecommunication infrastructure, maintaining privacy through the use of a tunneling protocol and security procedures. There are many different VPN solutions out there, and just deciding which one to choose can be difficult since they all have advantages and disadvantages. VPNs can be categorized as Secure or Trusted VPNs, Client-based or Web-based VPNs, Customer Edge-based or Provider Edge-based VPNs, or Outsourced or In-house VPNs. These categories often overlap each other. In order to decide what VPN solutions to choose for different parts of the enterprise infrastructure, the chosen solution should be the one that best meets the requirements of the enterprise. The purpose of this paper is to serve as a basis when creating an enterprise WAN which connects sites and users together using VPN technology. The purpose of creating such a WAN is to allow the resources of a company to be remotely accessed. VPN has attracted the attention of many organizations looking to both expand their networking capabilities and reduce their costs. A study of VPN involves many interesting aspects of network protocol design, Internet security, network service outsourcing, and technology standards.



Software And Hardware