You need to use your public ip and forward the port for it to work.

If you only want to resolve it internally you have to host the dns server and make every Device use your dns

You dont get the: this is a wendys joke do you?

And i dont vote for shit. Neither positive nor negative

Sir, this is a selfhosted subreddit

Powerline is the last resort in Networking.

Cable > WiFi > Powerline.

In some cases it works (new cables and within 1 circiut) but usually its more headache than anything else.

But dont worrys we all did shit and wonder why it didnt work.

Just be glad you were not called to a datacenter and started tracing all fibers just to realize that a single stupid uplink is 1 gbit instead of 40 gbit

I wouldnt.

Nextcloud is the stable Part with functions.

Wouldnt recommend owncloud since its worse in every aspekt.

Maybe syncthing etc?