Ports Used by Plesk

On servers protected by a firewall, the following ports must not be blocked to ensure proper operation of Plesk and accessibility of Plesk-managed services.

Service name Ports used by service

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 and Plesk Updater

TCP 80, TCP 443

FTP server

TCP 20, 21, 990

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

Tomcat Java service

TCP 9080, 9008

Licensing Server connections

TCP 5224

Domain name server

UDP 53, TCP 53

Plesk upgrades and updates

TCP 8447

* Warning: If you use Presence Builder, do not block inbound connections to port 8880, otherwise Presence Builder will not function.