Refresh interval for end users devices

Alan DeKok aland at
Fri Sep 26 13:52:01 CEST 2014

Rando Nakarmi wrote:
> For example, my phone got connected - authenticated, then i locked the
> phone, after a while  I open the phone, when it re-scan the network it
> actually sends the authentication request- gets re-authenticated. 

  That's how it works.  The phone disconnects from the access point in
order to save battery life.  Since it's disconnected, when it goes back
online, it has to re-connect and re-authenticate.

> Is there a way, it only authenticates once, if you are in same wireless
> access point ? I meant, when device re-scans the network and if you are
> with the same Wireless access point not to send the auth request to the
> server over and and over ? 

  You can use session caching.  See the "cache" subsection of the "eap"
module.  It will make later authentications faster.  But it won't stop
them from coming.

  In this case, the WiFi phone is asking for re-authentication, and the
NAS is requiring re-authentication.  RADIUS is just receiving the
authentication requests, and processing them.

  Alan DeKok.

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