Cannot Access Server Outside of Home Network

[lakinreid]

Since you are using Caddy, you do NOT need automatic port mapping enabled.  That setting will open ports 8096 on your router, which you are not using for remote access.  At least I don't think so.  When you connect from a remote client, are you using https://domain.duckdns.org?  Or http://domain.duckdns.org:8096?

So in the past I and my family was able to just type in domain.duckdns.org and it worked fine. Then the last few months I believe, only https://domain.duckdns.org would work. 

Though now I just tried the http://domain.duckdns.org:8096 and I was successful accessing the server from my cellular network!! I'm having a family member (one who was having issues) try it on there end in a bit, so hopefully that solves it. 

Any idea why the change in required address name happened over time? I did get a new router, modem, and ISP a few months back, would that have something to do with it?

Once again, I'm immensely grateful for your help!!