Reference guide for 42 commonly used ports.
| Port | Service | Description |
|---|---|---|
| 20 | FTP Data | File Transfer Protocol data channel |
| 21 | FTP Control | File Transfer Protocol control channel |
| 22 | SSH | Secure Shell |
| 23 | Telnet | Unencrypted remote access |
| 25 | SMTP | Simple Mail Transfer Protocol |
| 53 | DNS | Domain Name System |
| 67 | DHCP Server | Dynamic Host Configuration Protocol |
| 68 | DHCP Client | DHCP client port |
| 80 | HTTP | Hypertext Transfer Protocol |
| 110 | POP3 | Post Office Protocol v3 |
| 123 | NTP | Network Time Protocol |
| 143 | IMAP | Internet Message Access Protocol |
| 161 | SNMP | Simple Network Management Protocol |
| 389 | LDAP | Lightweight Directory Access Protocol |
| 443 | HTTPS | HTTP Secure |
| 445 | SMB | Server Message Block |
| 465 | SMTPS | SMTP over SSL |
| 587 | SMTP Submission | Email submission with STARTTLS encryption |
| 636 | LDAPS | LDAP over SSL |
| 993 | IMAPS | IMAP over SSL |
| 995 | POP3S | POP3 over SSL |
| 1433 | MSSQL | Microsoft SQL Server |
| 1521 | Oracle DB | Oracle Database default listener port |
| 1723 | PPTP VPN | Point-to-Point Tunneling Protocol |
| 2082 | cPanel HTTP | cPanel web hosting control panel (HTTP) |
| 2083 | cPanel HTTPS | cPanel web hosting control panel (HTTPS) |
| 2086 | WHM HTTP | Web Host Manager (HTTP) |
| 2087 | WHM HTTPS | Web Host Manager (HTTPS) |
| 3306 | MySQL | MySQL database server |
| 3389 | RDP | Remote Desktop Protocol |
| 5432 | PostgreSQL | PostgreSQL database server |
| 5900 | VNC | Virtual Network Computing |
| 6379 | Redis | Redis in-memory database and cache |
| 8080 | HTTP Alternate | Alternative HTTP port |
| 8443 | HTTPS Alternate | Alternative HTTPS port |
| 8888 | HTTP Proxy | Common port for HTTP proxy servers and development tools like Jupyter |
| 9090 | Prometheus | Prometheus monitoring server default port |
| 9200 | Elasticsearch | Elasticsearch HTTP API |
| 25565 | Minecraft | Minecraft Java Edition server default port |
| 27015 | Steam | Steam game server |
| 27017 | MongoDB | MongoDB database default port |
| 51820 | WireGuard | WireGuard VPN default port |