A port is a network location with certain address inside any operating system which main purpose is to differentiate traffic related to various services and apps. Ports are identified by the number from 1 to 65535. Each port is always bind to an IP address of a host and a protocol type relevant to communication way.
Port Types
Ports can be grouped into 3 main categories:
- System ports, 0-1023 – ports associated with core services and considered to be essential for operating system
- User ports, 1024-49151 – ports assigned by IANA using the ‘IETF Review’ process, the ‘IESG Approval’ process, or the ‘Expert Review’ process
- Dynamic ports, 49152-65535 – ports suggested for private use.
Plesk Ports
Here you will find a list of ports and protocols which are in use by Plesk services.
| Service name | Ports |
|---|---|
| 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 |
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