How to limit the connection duration per client per period (say, one MAC-address can connect only for 3 hours per week to the network).
Where could be defined such a rule? In the firewall?
So the rule should define not statically times (this is simple), when the client is allowed to access the network, but the duration of the connection per day/week/month, etc.
How/where to implement such rules? Is it possible to do so with OpenWRT/DD-WRT?