"Harp says 'No direct connection' but Nextcloud works." Fix: Your corporate firewall is blocking UDP. Configure your Harp client to use a relay (TOR or a public STUN server).
HaRP is a specialized reverse proxy designed to simplify how Nextcloud communicates with its microservices (ExApps) harp nextcloud
Nextcloud represents a pivotal counter-narrative in this history. It is a return to the concept of the digital hearthβa system one owns, maintains, and secures. To understand the significance of Nextcloud, however, it is helpful to look at an ancient instrument: the harp. "Harp says 'No direct connection' but Nextcloud works
(PHP):