Accounts staying online past Session Timeout value

[Mike Jakubik <mikej@rogers.com>]

Hello,

I am having some problems lately with freeradius 1.1.2 + mysql, and 
users staying online past their session timeout value (4 hours). Can 
anyone shed some light on the matter? I can not find any problems with 
the server itself, the loads are low and everything seems to be 
functioning OK. Would this be a function of the NAS to disconnect the 
user and send a stop packet or is it up to freeradius?

Also, sometimes i have users who are getting disconnected and can not 
reconnect because they are still shown to be online, and i am limiting 
the sessions to 1. Again, would this be a problem with the NAS/network 
because freeradius is not receiving the stop packet? This setup has been 
running for over 80 days without a problem, so it leads me to believe 
that the problem is not on the radius server, but i would like some 
second opinions.

Thank You.