You can use Session-Timeout attribute in your radreply sql table like:

+-----+-----------+-----------------+----+---------+-------+
| id  | UserName  | Attribute       | op | Value   |
+-----+-----------+-----------------+----+---------+-------+
|  | 257 | test  | Session-Timeout | := | 1800    | 
+-----+-----------+-----------------+----+---------+-------+


Regards
Bishal

On Thu, Jan 27, 2011 at 1:34 PM, piston <pistonic@yahoo.com> wrote:
Hi

Is that possible to reset the sql counter every 30 minute?

Basically, i need to get user free access of 20 minutes, after 20 minutes NAS will logout the user.

And the user is allow to login again after 30 minute.

Thanks


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