In the following diagram, if one NAS, for example NAS-2, crashes and comes back, it will send system account-on message for RADIUS server to clean up previous sessions. But if a RADIUS proxy server is used in the middle, how can the true RADIUS server distingush the previous sessions on NAS-2 from sessions on other NASes?
NAS-1 --| | NAS-2 --| |-- Proxy RADIUS Server --True RADIUS Server ... | | NAS-N --| __________________________________ Do you Yahoo!? Take Yahoo! Mail with you! Get it on your mobile phone. http://mobile.yahoo.com/maildemo - List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html