Common Ports

Common TCP ports used by cPanel Servers.

Port:         Description:
21 - ftp (File Transfer Protocol)
22 - ssh (secure shell)
25 - smtp (sending e-mail)
43 - whois (look-up site information in DNS)
53 - DNS (domain look-up)
80 - http (websites)
123 - NTP (syc system time with a time server)
110 - POP3 (download e-mail to client. Note: use IMAP instead)
143 - IMAP (check e-mail from a client)
443 - https (secure websites)
465 - smtp SSL/TLS (secure SMTP)
993 - IMAP SSL (secure IMAP)
995 - POP3 SSL (secure POP3)
2082 - cPanel (insecure)
2083 - cPanel SSL (secure access to the cPanel control app)
2087 - WHM SSL (secure access to WHM, cPanel's server control app)
2089 - cPanel licensing (must have open to contact cPanel license servers)
2095 - Webmail
2096 - Webmail SSL
3306 - MySQL (database)