That user has pfSense, and they are doing it wrong. I would follow the config and guidance from the pfSense dev on this one: https://forum.netgate.com/topic/112

That user has pfSense, and they are doing it wrong. I would follow the config and guidance from the pfSense dev on this one: https://forum.netgate.com/topic/112631/nintendo-switch-needs-static-port-on-its-outbound-nat?_=1642083327212 https://forum.netgate.com/topic/112631/nintendo-switch-needs... The most common problem I have seen over and over is double NAT or CGNAT. For the home networks I manage (my parents, in-laws, and my own), I put the ISP modems in bridge mode or passthrough mode.