Using methods of encryption and authentication, a virtual private network provides secure access to a remote computer or network over the Internet. In Havana, Neutron supports the creation and use of virtual private networks based on IPSec. In both the Havana and Icehouse releases of OpenStack, Virtual Private Network as a Service (VPNaaS) is considered experimental.

For your reference, the following Neutron commands are used to manage VPN connections in OpenStack:

The installation and configuration of VPNaaS is outside the scope of this book. For more information on the service, please refer to the official OpenStack documentation at http://docs.openstack.org/api/openstack-network/2.0/content/vpnaas_ext.html.