As it happens, (no idea why), a user is disconnceted after a poweroutage/powersurge/modem disconnection or whatever the reason is but the radius doesnt see the user as online.

The record in the radacct table has a Start Time but doesnt have a Stop time, the AcctStopTime is set at " 0000-00-00 00:00:00" which is probably because the user was disconnected abruptly and didn't have the chance to send the Account Stop packet or a Disconnect packet.

Anyway, to the bottom line - how do i deal with such situation?

If you're lucky, you can configure the NAS to send an Accounting-Start packet after it reboots. Then the stale sessions can be closed. If not: too bad. There is nothing in the RADIUS protocol that can help you decide whether a user session is still online or not. You can of course guess and mark the sessions as closed after a while. There are some scripts in FR that can help. I guess reading "Simultaneous Use" in the documentation directory might help. Greetings, Stefan Winter -- Stefan WINTER Fondation RESTENA - Réseau Téléinformatique de l'Education Nationale et de la Recherche - Ingénieur de recherche 6, rue Richard Coudenhove-Kalergi L-1359 Luxembourg