Hi @jarod5001, thank you for your answer.
The ports are already forwarded in the router. The router hasn’t been changed. All wiring, hardware and port configurations is same as before. I just transferred my internet subscription from one ISP to another.
The firewall configuration for these ports in yunohost is also ok. Maybe I should reset and reforward all those ports on the router?
By the way, I was getting a warning with /etc/resolve.conf, saying something like it wasn’t configured correctly. So I symlinked it using the following command last night:
$ sudo ln -sf /etc/resolvconf/run/resolv.conf /etc/resolv.conf
I did it based on this topic: /etc/resolv.conf and "Symlink error". After symlinking, that warning has dissappeared from the diagnosis reports.
So this might be the another possible cause of this problem?