A couple of days ago I upgraded my home internet from AT&T "high speed" DSL, to Verizon 5g cellular on an ASK-NCQ1338FA modem/router/wifi cube. That is an increase from 5mb down/.5mb up to about 300mb down/20mb up. Great stuff. Port forwarding was easy to set up. All of my duckdns servers work .... remotely, but are inaccessible on the LAN. In fact, when I enter the base subdomain.duckdns.org in a browser, my new router's admin page pops up. I never had this problem setting up port forwarding with AT&T. This new router's settings are quite simple, I cannot figure out what I am doing wrong, or if the router simply doesn't quite have the capability to pull it off.
Is anybody on the forum using Verizon's 5g home internet, or anyone for that matter with some idea of how to fix this little problem?