Sat Jun 12, 2010 1:26 am
Okay, so as usual with a little persistence and proper debugging, the solution has presented itself.
The NAS-Port-Type presented by the OpenVPN server is 0 (Async), whereas when using PPTP it's 5 (Virtual). Make sure your radius policies allow NAS-Port-Type to also be equal to 0.
The other issue was the Mikrotik is using unencrypted authentication between itself and the radius server, so you must tell the radius server to allow unencrypted authentication.
Then and only then will it work for you! Woohoo!