I don't believe this answers the question. I am in the same situation as darkminer and curious if port forwarding is possible. I need to from the WAN to an internal port on a device on the LAN. When I test out my settings using a website port forwarding checker, my ports are not being opened. My next attempt is to try bridge mode on the LTE router and will connect a UniFi Gateway/Router (USG). Suggestions and recommendations are welcomed.