NAS restart without proper client logout on radius (mysql)

[Claudiu Filip]

Hi Nataniel,


   If you have a NASty which doesn't send accounting-off when
   rebooting, I guess you have three options:

   1) use "checkrad" script to test if the user is indeed logged in.
   The NASty should have a way to check for connected users or sessions
   by using snmp/telnet/etc.
   If you have many auth requests and many "NASty"s, it will consume a
   lot of CPU on both sides.
   Result: no angry customers, but high cpu usage and no billing

   2) run every N minutes a script to get the list of connected users
   for every NASty. compare that list with the db entries and delete
   lost sessions from db.
   Result: low cpu usage, better billing (if your customers pay by time
   usage, you can still charge now() - N minutes - acct_start), but
   'already logged in' will last N minutes (at most)
   
   3) use petitiononline.com service to management with a subject
   "Network.Access.Server.TY must be replaced with
   Network.Access.Upgraded.Good.Hardware.TY".
   Result: no problems at all. using good hardware is always the best
   option.

   You can implement all three options IN THE SAME TIME to minimize
   the impact.


Best regards,

Claudiu Filip
@: claudiu at globtel.ro
Http://www.globtel.ro
T:+40344880100
F:+40344880113

Monday, July 16, 2007, 7:37:08 PM, you wrote:
>     Hello all,

>     I have a question: when a nas restart without sending client logout
> to the freeradius server the clients stay connected in radacct table 
> (AcctStopTime=0). What can I do to solve this kind of problem? What 
> could happen is that when a nas reboot my clients keep logged and when
> the nas start again they will get "You are already logged in" 
> (simultaneous-use).