23
Telnet
Telnet protocol
TCP
Remote Access
Port Information
Port Number
23
Protocol
TCP
Category
Remote Access
Common Usage
URL with Port
http://localhost:23 https://example.com:23
Node.js/Express Server
const express = require('express');
const app = express();
const PORT = 23;
app.listen(PORT, () => {
console.log(`Server running on port ${PORT}`);
});Docker Port Mapping
docker run -p 23:23 myapp # In docker-compose.yml ports: - "23:23"
Firewall Configuration
# Linux/Ubuntu firewall sudo ufw allow 23/tcp # Check if port is in use netstat -an | grep 23
Port 23 - Telnet
Telnet 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.