A Dynamic VPN Architecture for Private Cloud Computing

The classification of cloud computing includes public cloud, private cloud and hybrid cloud. Private cloud provides enterprise a secure environment to run business process, so many companies are planning to implement private clouds. Virtual private network (VPN) plays an important role to connect enterprise IT with the private cloud securely. Direct connected VPN usually allows for a small scale of secure connections into a private network over the public network. If the number of connections increases, the architecture of VPN would be more complicated which cannot meet the flexible adjustment feature of cloud computing. Therefore, we propose a VPN architecture for cloud computing, which can accommodate a large number of connections. Our proposed the architecture is based on hub-and-spoke and bipartite. It can manage the process of VPN connections. Corporation and service provider can connect to this architecture via PPTP, IPsec, or SSL to reduce the cost.