Hi Everyone, I'm using SQL for Simultaneous Use checking. It works in that if someone tries to auth when they're already logged in, they're rejected. However, sometimes the acct stop packet never makes it to freeradius (for whatever reason) when the user logs off. This leaves the "acctstoptime" field in the radacct table as NULL, which freeradius interprets as a live session. Obviously, the session doesn't actually exist on the NAS. I've read what checkrad does. From what I understand after reading the config files, checkrad only works in conjunction with radutmp. I'm not using radutmp since I've deployed freeradius with SQL. So, how do I ensure what freeradius' understands to be a live session matches what the NAS sees? How do I update a user's acctstoptime when the NAS doesn't have a session for that user, but the DB shows as "NULL" (i.e. freeradius believes the user is live)? Is this where the "deletestalesessions" parameter in sql.conf comes in? What if users are logged in for days at a time? Should lease-duration just be bumped up to something that works better for us than the "3600" default? Regards, Ranbir