We have a controller in the LAN with a GRE tunnel to a controller in the DMZ with an external captive portal on ClearPass Guest 6.4.2. Testing has been fine, new users create an account and can login and use the guest wirless all day long.
The issue we have encountered is when users returns and logs in again after a day or so, authentication suceeds they can browse the internet for 15-30 odd seconds before they are redirected to log back in to clearpass again. Logging in again 9 times out of 10 they connect for 15-30 seconds before being prompted for authentication again.
We've set the accounts upon creation to never expire.
Any suggestions on how to resolve this?
thanks