3389
RDP
Remote Desktop Protocol
TCP
Remote Access
Port Information
Port Number
3389
Protocol
TCP
Category
Remote Access
Common Usage
URL with Port
http://localhost:3389 https://example.com:3389
Node.js/Express Server
const express = require('express');
const app = express();
const PORT = 3389;
app.listen(PORT, () => {
console.log(`Server running on port ${PORT}`);
});Docker Port Mapping
docker run -p 3389:3389 myapp # In docker-compose.yml ports: - "3389:3389"
Firewall Configuration
# Linux/Ubuntu firewall sudo ufw allow 3389/tcp # Check if port is in use netstat -an | grep 3389
Port 3389 - RDP
Remote Desktop Protocol This is a TCP port commonly used in remote access applications. Port numbers range from 0-65535, with ports 0-1023 being well-known system ports, 1024-49151 being registered ports, and 49152-65535 being dynamic/private ports.