Dictionary · Protocols and Ports
RDP
RDP — Remote Desktop Protocol
Remote access · Beginner
A protocol for a graphical remote desktop. It commonly uses TCP 3389 and can also use UDP 3389. Exposure to the open Internet is a frequent source of unauthorized login attempts.
It lets an allowed user see and operate a distant Windows desktop. The port should be limited to trusted networks, a gateway, or a tunnel rather than left open to everyone.
Example: A support technician reaches an office PC through a remote-desktop gateway instead of publishing the PC directly.
Ports
- TCP/UDP 3389 — Graphical remote desktop
Common misconception
- A graphical remote session is not the same as an encrypted text shell, and opening its port to the world is not a minor convenience.