Although IP VPN technology has recently been imposed because of its cost effectiveness and that several research studies have been proposed for centralized policy management of intra / inter VPN domain, most solutions are only addressed to VPN site-to-site technology, according to our researches no centralized management model based on a server for dynamic multipoint VPN networks was proposed. In this paper we propose a model “DMVPN Security Management System”for centralized policy management of dynamic multipoint multi-architectures VPN network, using a new web interface. We have implemented and tested the model on Single Hub Single Cloud architecture consisting of ten Spokes, the time required for an expert on VPN networks for manual set up of this architecture is an hour, we moved that to five minutes with our model, in addition to time effectiveness the margin error is null.