Services

Good day to you, 
I have been working on trying to setup m0n0wall as a captive portal with freeradius, which is working fine. (freeradius is answering m0n0wall requests, WOOHOO!) . What I would like to know is what attributes m0n0wall support?  I know other technologies such as chillispot or microtik (i think that's what its called) have a dictionary file where you can see all the attributes they support.. is there anything similarly available for m0n0wall?

Any hints, suggestions or scolding is very much appreciated!