It was written by James Yonan and is published under the GNU General Public License (GPL). It is capable of traversing network address translators (NATs) and firewalls. Your Saved List Become a Channel Partner Sell in AWS Marketplace Amazon Web Services Home Help. However if you are looking for a VPN termination service where you can connect. Purchasing and having a license key does not mean that you can connect to with your OpenVPN client program. It uses a custom security protocol that utilizes SSL/TLS for key exchange. AWS Marketplace: OpenVPN Access Server (10 Connected Devices) Categories. A license key is meant for an OpenVPN Access Server installation on a server you provide and manage. OpenVPN is an open-source commercial software that implements virtual private network (VPN) techniques to create secure point-to-point or site-to-site connections in routed or bridged configurations and remote access facilities.