if you cannot ping the NAS, probably it is down.
however, when your NAS updates its accounting, radius will no be aware to remove its stale sessions,
i believe, the time taken here depends on how your NAS updates accounting packets to your RAS.
with my case it is from 2 minutes to 10 minutes, the stale sessions will be gone.
it is not good and advisable to force and remove the stale sessions completely using
zap commands, it is depreciated but it does the job.
hope it helps


From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of nikwan (sent by Nabble.com)
Sent: Tuesday, February 07, 2006 2:06 PM
To: freeradius-users@lists.freeradius.org
Subject: NAS online/offline?

Hypothetically situation:
You have users logged into a NAS. the NAS goes down without warning (power failure...) Users who where logged in now have sessions which are not complete (acctstoptime is set to NULL). In my case Simultaneous logins is disabled and need to be so. Therefore once the NAS is brought back up. the users cant log back in, as radius will not authorize the users as they are apparently logged in.
My question is... How do i set the accstoptime to the time when the NAS goes down. Is there a way to see when a NAS dies....
Any input will be greatly appreciated

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