PortGuard

Know what's exposed on your network - free, instant, no signup.

Covers the most commonly exposed ports and what to do about each.

Commonly checked ports

  • 21 - FTP
  • 22 - SSH
  • 23 - Telnet
  • 25 - SMTP
  • 53 - DNS
  • 80 - HTTP
  • 110 - POP3
  • 143 - IMAP
  • 443 - HTTPS
  • 445 - SMB
  • 1433 - Microsoft SQL Server
  • 3306 - MySQL
  • 3389 - RDP
  • 5432 - PostgreSQL
  • 5900 - VNC
  • 6379 - Redis
  • 8080 - HTTP (alternate)
  • 8443 - HTTPS (alternate)
  • 27017 - MongoDB