Chapter 1 What’s New for FortiOS 5.0 : Wireless : WiFi data channel encryption : Configuring DTLS on the FortiGate unit
  
Configuring DTLS on the FortiGate unit
To enable DTLS for the FAP320B-default profile, enter:
config wireless-controller wtp-profile
edit FAP320B-default
set dtls-policy dtls-enabled
end