When using the Radius Client/PPPoE Server in the router unit.
Is it possible to include a "Revert" to an "Expired" named IP pool listed in the router OS IP pools.
When the Radius Server advises the Router that the customer is "Non-Authorized", the Router would direct the CPE to an "Expired" IP pool address that would then be assigned to it automatically. This would allow the router to "Redirect", with the proper firewall rules to a web page for payment.
If the using Carrier didn't want the "Revert" to happen automatically, then the "Expired" pool could be left blank !!
Even if the Customer was "Terminated" instead of "Expired", they still would not be able to use the service, as they would only be directed to the web page (for payment).