The BYOL model works on any OpenVPN Access Server, except the Amazon AWS tiered instance type that comes with a specification of the amount of connected devices allowed. With the BYOL model you can purchase a license key through our main website and activate it on your Access Server. These license keys are single-activation and lock to the system you activate it on, and unlock a certain amount of simultaneous VPN connections for the duration of the license key. When the license key expires, the license key disappears off the server. As explained below this licensing model is also available on Amazon AWS if you choose the BYOL type OpenVPN Access Server instance from the AWS Marketplace. The instances that specifically mention the amount of "connected devices" do not work with the BYOL licensing model but are instead billed directly through Amazon.