Ports Used by Plesk
summary: For Plesk and its services to work correctly, certain ports must not be blocked.
In this topic, you will learn what ports must be kept open on Plesk servers.
The following is a list of ports and protocols used by Plesk services.
| Service name | Ports used by service |
|---|---|
| Administrative interface of Plesk over HTTPS | TCP 8443 |
| Administrative interface of Plesk over HTTP | TCP 8880 |
| 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 |
| MySQL/MariaDB 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 updates | TCP 8447 |
Note: If you install Presence Builder as part of Plesk, Presence Builder uses the same protocol and opens on the same port as the Plesk UI.