I know I can secure my WiFi via MAC address restrictions and WPA encryption.
I have a WiFi router without access restrictions and an Internet connection. I want to configure the router so that it should allow any user to connect over WiFi, but until I permit them they won't be able to use the Internet or engage in any sort of communication with other clients.
I would essentially be an administrator and would allow the users to use my resources, just like we connect to our ISPs.
Is this possible? Is there any software or tools available to do this?