3389 port number Port 3389 is used for Windows Remote Desktop and Remote Assistance connections (RDP) and is vulnerable to Denial of Service Attack. It is also used by Zmodo Geovision and other applications. See IANA registration, references, and security scan..
3389 port used for Remote Desktop allows remote connections to computers running Windows or Windows Server over the Remote Desktop Protocol (RDP), listening on port 3389 by default. For security or configuration purposes, you might want to change this listening port.
port 3389 used for To change RDP settings, access the Registry Editor or Group Policy Editor, navigate to the RDP-Tcp entry, modify the port number, and restart the Remote Desktop Services. What is the RDP port? The default RDP port is 3389, serving as the communication channel for remote desktop connections. How do I change my port number?