Port Scanner Reference
A reference list of common networking ports.
⚠️
Browser Security Limitation
Web browsers cannot perform true low-level TCP/UDP port scanning due to sandboxing restrictions. For a deep security scan of your network firewall, we recommend GRC ShieldsUP.
| Port | Service | Description |
|---|---|---|
| 20 | FTP Data | File Transfer Protocol (Data) |
| 21 | FTP Control | File Transfer Protocol (Command) |
| 22 | SSH | Secure Shell Login |
| 25 | SMTP | Simple Mail Transfer Protocol |
| 53 | DNS | Domain Name System |
| 80 | HTTP | Hypertext Transfer Protocol |
| 110 | POP3 | Post Office Protocol v3 |
| 143 | IMAP | Internet Message Access Protocol |
| 443 | HTTPS | HTTP Secure |
| 3306 | MySQL | MySQL Database |
| 3389 | RDP | Remote Desktop Protocol |
| 5432 | PostgreSQL | PostgreSQL Database |
| 8080 | HTTP-Alt | Common Alternative HTTP |