Port 3389: What Is It Used for & How to Open It for RDP -...

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3389 port used for This article introduces the ports that need to be open on firewalls to configure Remote Desktop Services (RDS) correctly. The information and taxonomy are broken down by role, service, and component, and all inbound and outbound ports used are listed..

port 3389 Port 3389 is used for Remote Desktop Protocol (RDP), which is used by Microsoft Windows remote access tools to allow remote desktop connections between computers over a network. Ports those registered with IANA are shown as official ports. The same port number may be unofficialy used by various services or applications.

3389 port is used for Remote Desktop Protocol (RDP) is a proprietary protocol developed by Microsoft to remotely connect to a Windows system using a graphical user interface. RDP is built into Windows by default. RDP listens on TCP port 3389 and udp port 3389. Previously, the RDP software was called Terminal Services client but now it’s called Remote Desktop Connection.