Common Network Ports
Technical descriptions, default protocols, security vulnerability risks, and configurations for network ports.
| Port | Service | Protocol | Description | Action |
|---|---|---|---|---|
| Port 20 | FTP Data Transfer | TCP | File Transfer Protocol data connection. | Details |
| Port 21 | FTP Control Connection | TCP | File Transfer Protocol control commands. | Details |
| Port 22 | SSH / SFTP | TCP | Secure Shell remote console access. | Details |
| Port 23 | Telnet | TCP | Plaintext remote terminal session (insecure). | Details |
| Port 25 | SMTP | TCP | Simple Mail Transfer Protocol routing. | Details |
| Port 53 | DNS | TCP/UDP | Domain Name System resolutions. | Details |
| Port 80 | HTTP | TCP | Hypertext Transfer Protocol unencrypted web. | Details |
| Port 110 | POP3 | TCP | Post Office Protocol v3 email download. | Details |
| Port 123 | NTP | UDP | Network Time Protocol clock sync. | Details |
| Port 143 | IMAP | TCP | Internet Message Access Protocol email query. | Details |
| Port 443 | HTTPS | TCP | HTTP Secure encrypted web servers. | Details |
| Port 465 | SMTPS | TCP | Secure SMTP over SSL/TLS. | Details |
| Port 587 | SMTP Submission | TCP | SMTP client email submission. | Details |
| Port 993 | IMAPS | TCP | IMAP over secure TLS channel. | Details |
| Port 995 | POP3S | TCP | POP3 over secure TLS channel. | Details |
| Port 1433 | MSSQL Server | TCP | Microsoft SQL Server database agent. | Details |
| Port 3306 | MySQL Database | TCP | MySQL Database relational database engine. | Details |
| Port 3389 | RDP | TCP/UDP | Remote Desktop Protocol client connections. | Details |
| Port 5432 | PostgreSQL Database | TCP | PostgreSQL database communication engine. | Details |
| Port 8080 | HTTP Alternate | TCP | Alternate HTTP development port. | Details |