====== Principles of RADIUSdesk NAS Devices ======
===== Introduction =====
Users gain access to the network through a NAS device. These include:
  * Captive portals
  * WiFi Access Points with WPA2 Enterprise enabled
  * VPN servers
  * Dial-up servers
  * 802.1x enabled Ethernet switches

===== Direct, Dynamic or VPN =====
NAS devices can be connected to the the FreeRADIUS in the following ways:
  * **Direct connection**- FreeRADIUS knows the IP Address of the NAS device and this device communicates through the Ethernet connection with FreeRADIUS.
  * **Dynamic Clients**- FreeRADIUS detects and tries to dynamically register NAS devices that has not yet been connected to it, by adding the unknown IP Address to the list of known IP Adresses.
  * **VPN**- The NAS device will connect to the server running FreeRADIUS through a VPN connection who's IP Address is known.
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