Radmin 授權方式

若要以「主控端 / 被控端」的概念來解釋：

被控端：Radmin Server（須購買授權）
主控端：Radmin Viewer（免費）

Radmin 3 Remote Control consists of two separate modules: Radmin Server 3 (which needs to be installed on the remote computer) and Radmin Viewer 3 (which needs to be installed on the local computer). Only Radmin Server 3 is licensed. Radmin Viewer 3 is free of charge and can be used on any number of computers.

原廠說明：http://www.radmin.com/ordering/licensing.php