Very interesting. I even found some protocols that exactly implement the functionality I was thinking of! https://en.wikipedia.org/wiki/Internet_Gateway_Device

Very interesting. I even found some protocols that exactly implement the functionality I was thinking of! https://en.wikipedia.org/wiki/Internet_Gateway_Device_Protocol https://en.wikipedia.org/wiki/Internet_Gateway_Device_Protoc... https://en.wikipedia.org/wiki/Port_Control_Protocol https://en.wikipedia.org/wiki/Port_Control_Protocol