pfSense

Radius Accounting packets are critical to any enterprise implementation of OpenVPN due to compliance reasons. It is also important for anyone that wants to maintain a historical log of who logged in, how much data they sent, what IP they had while they were logged in, etc. Currently other parts of PFSense (PPTP) send out radius accounting data but OpenVPN does not (it does however do AUTH just fine). This is even more confusing since defining a radius server in the user-management section requires you to give the radius accounting port (leading you to believe it is support across the platform). There are openvpn accounting modules currently available for debian (radiusplugin.so) which function fine.