Common Network Ports
Reference guide for commonly used network ports and services
| Port | Protocol | Service | Description |
|---|---|---|---|
| 21 | TCP | FTP | File Transfer Protocol |
| 22 | TCP | SSH | Secure Shell |
| 23 | TCP | Telnet | Telnet Protocol |
| 25 | TCP | SMTP | Simple Mail Transfer Protocol |
| 53 | TCP/UDP | DNS | Domain Name System |
| 80 | TCP | HTTP | Hypertext Transfer Protocol |
| 110 | TCP | POP3 | Post Office Protocol v3 |
| 143 | TCP | IMAP | Internet Message Access Protocol |
| 443 | TCP | HTTPS | HTTP Secure |
| 993 | TCP | IMAPS | IMAP over SSL |
| 995 | TCP | POP3S | POP3 over SSL |
| 3389 | TCP | RDP | Remote Desktop Protocol |