Port 3389 (tcp/udp) :: SpeedGuide

3389 port number used for Port 3389 is used to facilitate remote access to Windows computers through the Remote Desktop Protocol (RDP). This connection method allows users to operate a remote desktop or server as if they were physically present, regardless of location..

port 3389 not listening  It is used to allow users to connect to remote computers. For instance, Microsoft Remote Desktop Protocol typically uses TCP port 3389 to enable Remote Desktop connections to other computers. It allows remote network access over an encrypted route. Is port 3389 safe?

3389 no hu  If you don't want to use 3389 externally, open a different port externally, but point it to 3389 on the IP address of the machine you want RDC on. This is helpful for routing many systems with RDC.