Ports
On urBackup server:
- 55413/TCP - FastCGI for web interface.
- 55414/TCP - regular HTTP web interface.
- 55415/TCP - for Internet clients. Needed if the client connects not as a local LAN client, but via Internet mode / NAT.
- 35623/UDP — UDP broadcast for client detection.
On the urBackup client:
- 35621/TCP — file transfer during file backup.
- 35622/UDP — discovery via UDP broadcast.
- 35623/TCP — commands and image backup.
If you need what to open in OPNsense between the server and the client, then the practical minimum is this:
- Server → Client:
35621/TCP,35623/TCP - Server → Client:
35622/UDPfor discovery on the local network - Client → Server:
55414/TCP - Client → Server:
55415/TCPonly if you use Internet clients - Server → LAN broadcast:
35623/UDPfor auto-detection of clients.
Important point: urBackup automatically detects clients when the server and clients are in the same subnet; this is explicitly described in the manual.