Parallels Plesk Panel is middleware between end users and external services such as FTP, mail, DNS and others. Due to technical limitations, Panel is able to interact with these services only if they are available on certain ports.
The list below provides information about services managed through Panel and about ports on which they should be available for proper interaction with Panel. If you use a firewall, make sure that the connections to all of these ports are allowed for corresponding Panel services.
Service name |
Ports used by service |
Administrative interface of the Panel |
TCP 8443, 8880 |
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 |
MS SQL server |
TCP 1433 |
PostgreSQL server |
TCP 5432 |
Licensing Server connections |
TCP 5224 |
Domain name server |
UDP 53, TCP 53 |
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