The aim of this Master Thesis project is to design and implement a new Virtual Private Network (VPN) independent of a single Internet service provider. This VPI will give rise to a great flexibility to the Enterprise communications network. A parallel and progressive installation of the new VPI is needed so as to avoid loss of connectivity during the migration process from the installed network deployed by Telefónica de España, S.A. Therefore it is compulsory to implement a secure and reliable solution for establishing secure connections between the central and each of the one hundred nodes. With this new VPN we provide the network, in addition to flexibility, High Availability Communications and failover protection. In addition, t...