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Ports & Protocols

Common TCP/UDP Port Reference
Port Protocol Service Description / Notes
Tip: Use netstat -tlnp (Linux) or netstat -an (Windows) to view listening ports. Use nmap -sV target to scan and identify services.

Essential Web Ports

  • 80HTTP
  • 443HTTPS
  • 8080HTTP Proxy/Alt
  • 8443HTTPS Alt
  • 3000Dev Server (Node)
  • 5000Dev Server (Flask)

Remote Access Ports

  • 22SSH
  • 23Telnet (insecure)
  • 3389RDP
  • 5900VNC
  • 5985WinRM HTTP
  • 5986WinRM HTTPS

Database Ports

  • 3306MySQL/MariaDB
  • 5432PostgreSQL
  • 1433MS SQL Server
  • 1521Oracle DB
  • 27017MongoDB
  • 6379Redis

Port Ranges

  • 0-1023Well-Known (System)
  • 1024-49151Registered (User)
  • 49152-65535Dynamic/Private
  • 1-1024Requires root/admin