The following is a list of ports and protocols used by Plesk services.
| Plesk Service Name | Open Ports / Ports Used |
|---|---|
| Administrative interface of Plesk over HTTPS | TCP 8443 |
| Administrative interface of Plesk over HTTP | TCP 8880 |
| Samba (file sharing on Windows networks) | UDP 137, UDP 138, TCP 139, TCP 445 |
| VPN service | UDP 1194 |
| Web server | TCP 80, TCP 443 |
| FTP server | TCP 21 |
| SSH (secure shell) server | TCP 22 |
| SMTP (mail sending) server | TCP 25, TCP 465 |
| POP3 (mail retrieval) server | TCP 110, TCP 995 |
| IMAP (mail retrieval) server | TCP 143, TCP 993 |
| Mail password change service | TCP 106 |
| MySQL server | TCP 3306 |
| Microsoft SQL Server | TCP 1433 |
| PostgreSQL server | TCP 5432 |
| Licensing Server connections | TCP 443 |
| Domain name server | UDP 53, TCP 53 |
| Plesk Installer, Plesk upgrades and updates | TCP 8447 |
