Internet & Networking
Common Ports Reference
A quick reference for the ports you'll actually run into — no live scanning, just the standard assignments.
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| Port | Service | Description |
|---|---|---|
| 20/21 | FTP | File Transfer Protocol (data/control) |
| 22 | SSH | Secure Shell remote access |
| 23 | Telnet | Unencrypted remote access (legacy) |
| 25 | SMTP | Outbound email transfer |
| 53 | DNS | Domain name resolution |
| 80 | HTTP | Unencrypted web traffic |
| 110 | POP3 | Email retrieval (legacy) |
| 143 | IMAP | Email retrieval |
| 443 | HTTPS | Encrypted web traffic (TLS) |
| 465/587 | SMTPS | Encrypted outbound email |
| 3306 | MySQL | MySQL database default port |
| 5432 | PostgreSQL | PostgreSQL database default port |
| 6379 | Redis | Redis default port |
| 27017 | MongoDB | MongoDB default port |
| 8080 | HTTP-ALT | Common alternate web/proxy port |
| 3389 | RDP | Windows Remote Desktop Protocol |
16 of 16 rows
How it works
- 1Search by port number or service name
- 2Matching entries filter instantly
Who this is for
- Looking up what a port number typically means
- Configuring firewall rules by service
- Quick reference during infrastructure setup
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