RADIUS encryption - What protocol is used by PF?

[alexus]

Hey all,
I'm debuging new branch of BF boxes and new radius server and for some reason it aint working.
When I try to login, radius sends access-reject with the reason that there might be an error in passphrase or password is incorect. I was able to replicate the error with natping and baisically if I send CHAP formated packets all work good, but if I dont use CHAP then I get the same error as I get w/ PF.

Can some one remind me if PF or Mono uses CHAP or MS-CHAP v2 or something?
If not I guess thats sux.

???