logging unknown clients

[Greg Woods]

Is there any way to get the freeradius 2.1 server to log requests coming
from unknown clients? As far as I can tell, these are just silently
discarded. I have read through all the comments on the log section in
radiusd.conf but I don't see anything about this. Is there anywhere else
where the logging capabilities are more fully documented that I just
haven't been able to find?

Thanks,
--Greg