I have a web service I'm trying to expose through my FiOS-G1100 router. I set the TCP port and tested using my publicly exposed IP and everything worked fine. But then, when I test with a client outside my home network, the port can't be opened. As in, accessing
http://ddns.mynetwork.tld:8080 on my phone with wifi on works, but disconnecting the wifi and using 4G the same URL suddenly can't connect.
What could cause this behavior? I would imagine the firewall on the router, but I've tried changing the inbound and outbound policies to a straight
accept and it's still no-go. Is there something special about FiOS routers that won't let you properly forward a port?