Proxy-tester nagios check for Freeradius

Hello! I would like to make a proxy-tester Nagios check for Freeradius and would like to ask some help for debugging as I experience some problem with using eapol_test. The design is that a user wants to authenticate at realm "A" with credentials stored at realm "B". The infrastructure already set up for proxying based on the realm names and the Access-Requests are do forwarded. I tried this proxy scenario with radtest. And with radtest it works. However, I have some questions regarding this developer work. Maybe you can help me. The first is: is it true, that radtest doesn't encrypt it's messages so proxy requests will contain the password in a recoverable manner? - Tamas Fekete