Advanced
User Idle Timeout
Set the amount of time in minutes, after which, if no update is received for this user, it will be considered offline and the session will close. This number should be at least 2 minutes higher than the interim-update amount in your NAS. For example, if the interim-update (accounting interval) was 1 minute in your NAS, then you should set the User Idle Timeout to 2 or 4 minutes.
Note that when SAS closes the session, and the user is actually online in your NAS, it will not be disconnected. However, if any new accounting-update packet is received from NAS for the same session id, then SAS will reopen the same session instead of creating a new one.