Controlled by the NAS and/or the RADIUS server depending on NAS settings. ie you should be able to set session-timeout on the NAS and then override/update the value on the RADIUS server depending on your chosen policies...eg for particular users/clients etc...and if proxying you may have agreements or filtering in place to set/agree the value
alan -- This smartphone uses free WiFi around the world with eduroam, now that's what I call smart.
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