Common Network Ports that everyone should know

  • 20 – FTP (File Transfer Protocol – Data Transfer)
  • 21 – FTP (File Transfer Protocol – Command Control)
  • 22 – SSH (Secure Shell)
  • 23 – Telnet
  • 25 – SMTP (Simple Mail Transfer Protocol
  • 53 – DNS (Domain Name System Service)
  • 80 – HTTP (Hypertext Transfer Protocol)
  • 110 – POP3 (Post Office Protocol)
  • 119 – NNTP (Network News Transfer Protocol)
  • 123 – NTP (Network Time Protocol)
  • 143 – IMAP (Internet Message Access Protocol)
  • 161 – SNMP (Simple Network Management Protocol)
  • 194 – IRC (Internet Relay Chat)
  • 443 – HTTPS (Hyptertext Transfer Protocol Secure)
  • 3389 – RDP (Remote Desktop Protocol)

While the above are some of the more common ports used you can fine a more complete list here: https://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers

Related Posts