What port should I open to allow remote desktop? - Server Fault

3389 port tcp or udp Actually, Remote Desktop requires TCP port 3389 to be open. Also, opening UDP port 3389 enables acceleration since RDP 8.0 (e.g. Windows 7 with RDP 8 Update, Windows 8, or Windows 10). In other words, if you use the former version of RDP (before RDP 8.0), then TCP will be the only protocol that can be used..

port 3389 not listening  UDP port 3389 enables acceleration since RDP 8.0. To use RDP, you need to open port 3389 on your Windows firewall and your router. This will allow incoming and outgoing traffic on that port and enable you to connect to your PC remotely.

topolino 3389  Microsoft’s Remote Desktop Protocol (RDP) enables users to establish remote connections to other computers over TCP AND UDP port 3389. RDP supports UDP for improved performance. Microsoft favours using UDP alongside TCP to enhance responsiveness and reduce latency during remote sessions.