You can monitor RADIUS activity and log out users.
To view currently active RADIUS accounting sessions, go to Monitor > Authentication > RADIUS Sessions.
The page shows the user's name, type, IP address, MAC address, and RADIUS client, duration, and data usage columns. More specifically, Accounting-Start Interim-Update packets are received. A user session is removed from this table after the Accounting-Stop packet is received, or the session doesn't receive any RADIUS accounting packets before the timeout period expires.
To log out a user as an admin, select the user from the table and select Logoff.
There are two pages to view: Active and Cumulative. Select Cumulative to view statistics for user who have a time and/or data usage limit. This information may be accumulated through a succession of RADIUS accounting sessions. A user's stats are removed when explicitly deleted by the administrator (by selecting the user and selecting Delete), or when the user's account itself is deleted.
While administrators can log out users, they can also reset a user's time and/or data usage using Reset Usage.
For more information on user time and data usage limits, see Usage profile.
RADIUS accounting sessions can be configured to timeout after a specific time period has been reached. To do so, see General.