So I was able to install everything correctly, but I don’t know what I’m supposed to do in order for people that don’t have my same IP to see my files. I’d like to share my Jellyfin server with some friends so they can see movies there. I’ve already open the ports, but they can’t still access them, I’m using elementaryOS Hera which is built on Ubuntu 18.04.4 LTS.
Both internal and external should be 443. create another one with both port 80.
In your router’s setup page, what is your external IP address? is it something like 10.xx.xx.xx?
Then run caddy and try to connect example.duckdns.org
Did you setup duckdns through your router? can you go to it’s settings and see it is pointing to the right one?
It hasn’t been workin because I am under a double NAT, so my ports aren’t really open, so I need to contact my ISP and see if they can give me my own IP or if they can open the ports.
They won’t give you your own ipv4 address unless you’re registered as a business. Try asking for ipv6 address.
That makes sense.