AffairesDePiassesB

Why not just use rsync? With my experience, I’d rather go with that than any solution based on time machine, especially over Wan, as it is quite unreliable if the connection isn’t perfect.

Otherwise, as long as you can mount the share as smb, you should be able to use it for time machine, so anything like freenas, truenas, unraid, open media vault should do the trick.