Jellyfin server is not always accessible?

[LesterQ]

I have a website hosted on NoIP, which redirects to my server. This functionality works perfectly, allowing people outside my network to access my website. I can also access it myself. However, after a few days, it suddenly would stop being accessible. I’ve had to repeatedly restart the server everytime it becomes inaccessible and then it will become accessible again. 

I use Mac Mini M1 with thr latest OS if that makes any difference. 

Thanks.

[TheDreadPirate]

Did your public IP address change? Is the NoIP client running on your server to automatically update the IP?

Also, are you manually setting up the port forwarding or are you using "Automatic Port Mapping" in Jellyfin?