most people use 2FAuth on their consoles nowadays. Also most modern routers have a SPA(statefull packet inspection) firewall enabled by default. This is a fancy way of saying the router looks at all the outbound and inbound converstions and matches an outbound conversation to an inbound one. if the convestion only has an inbound one with a corresponding outbound one then the connection gets dropped.

I don't even know what that is, but thanks for the heads up.