A virtual private network (VPN) is a network that uses a public telecommunication infrastructure, such as the Internet, to provide remote offices or individual users with secure access to their organization's network. VPN provides big companies to communicate with their offices, franchisers, factories and stores safely and economically and to manage business process affectively and some other strategic advantages. Institutional Virtual Private Network Service is the service that allows the companies to communicate with their offices, regional offices, franchisers, warehouses and factories through the internet or Telecom data network by reaching their own network to achieve all commercial and institutional applications economically and safely.