Port Scanner
Common ports reference & WebSocket connectivity check
Note: Browser-based port scanning is limited by CORS/security policies. For comprehensive port scanning, use tools like
nmap from the command line. This tool performs basic connectivity checks on common web ports.Common Ports Reference
| Port | Protocol | Service | Description |
|---|---|---|---|
| 20-21 | TCP | FTP | File Transfer Protocol (data/control) |
| 22 | TCP | SSH | Secure Shell — encrypted remote access |
| 23 | TCP | Telnet | Unencrypted remote access (insecure) |
| 25 | TCP | SMTP | Simple Mail Transfer Protocol |
| 53 | TCP/UDP | DNS | Domain Name System |
| 80 | TCP | HTTP | Web traffic (unencrypted) |
| 110 | TCP | POP3 | Post Office Protocol v3 |
| 143 | TCP | IMAP | Internet Message Access Protocol |
| 443 | TCP | HTTPS | Web traffic (encrypted/SSL) |
| 465 | TCP | SMTPS | SMTP over SSL |
| 587 | TCP | SMTP | Mail submission (STARTTLS) |
| 993 | TCP | IMAPS | IMAP over SSL |
| 995 | TCP | POP3S | POP3 over SSL |
| 3306 | TCP | MySQL | MySQL database server |
| 3389 | TCP | RDP | Remote Desktop Protocol |
| 5432 | TCP | PostgreSQL | PostgreSQL database |
| 5900 | TCP | VNC | Virtual Network Computing |
| 8080 | TCP | HTTP Alt | Alternative HTTP port |
| 8443 | TCP | HTTPS Alt | Alternative HTTPS port |
| 27017 | TCP | MongoDB | MongoDB database |