As business grows, it might be necessary to expand the cloud environment to multiple data centers. Of course, the implementation of a VPN setup whether it is a simple SSL one or an IPSEC solution will provide a secure communication path for the tenant traffic across the Internet. OpenStack provides isolated networks and network access control to avoid traffic congestion and improve the security of the internal network of the OpenStack environment. The VPN as a Service (VPNaaS) function protects the integrity of data by using the tunneling and encryption to provide a secure connection between machines that are geographically located in different data centers.
The next figure depicts two different OpenStack ...
