Startup Idea: WiFi Monitoring and Intruder Alert System

Startup idea to develop a software that monitors WiFi network for unauthorised accesses and potential breaches. It should alert when there is an access from non-authorized personnel, access from outside the predefined boundary, or if someone is attempting to access/hack other devices within the network.

I work for a business that has WiFi for our customers and workers, I need software that will alert me if non-authorized personnel somehow access our system, someone is using our WiFi from outside the building, or someone is accessing/hacking other peoples device through our WiFi.