cPanel / WHM Inbound and Outbound Ports List

27 Jan 2010

List of cPanel / WHM Inbound and Outbound Ports

Author: willem In: apache, cpanel, mysql, tips & tricks, tools, unix, whm

cPanel in combination with WHM is a Unix-based (usually integrated with CentOS Linux) web hosting control panel that provides a graphical interface and automation tools designed to simplify the process of hosting websites.

In combination with WebHost Manager (WHM), the software offers GUI, command line, and API-based access that allows third-party software vendors, web hosting organizations, and developers to automate standard system administration processes to manage hosting accounts on a web server.

If you have a WHM-based server running behind a firewall, you’ll need to open certain ports on your firewall to enable all services. The following are lists of Inbound and Outbound Ports used by the cPanel and WHM software:

Inbound Port	URL	Application
TCP 20	-	FTP
TCP 21	-	FTP
TCP 22	-	SSH
TCP 25	-	SMTP
TCP 26	-	SMTP
TCP 53	-	DNS
TCP 80	-	HTTP
TCP 110	-	POP3
TCP 143	-	IMAP4
TCP 443	-	HTTPS
TCP 465	-	SMTP (TLS / SSL)
TCP 993	-	IMAP4 (SSL)
TCP 995	-	POP3 (SSL)
TCP 2082	http://yourdomain.com/cpanel	cPanel
TCP 2083	https://yourdomain.com/cpanel	cPanel (SSL)
TCP 2086	http://yourdomain.com/whm	WHM
TCP 2087	https://yourdomain.com/whm	WHM (SSL)
TCP 2095	http://yourdomain.com/webmail	Webmail
TCP 2096	https://yourdomain.com/webmail	Webmail (SSL)
TCP 3306	-	MySQL (external connections)
TCP 6666	-	Chat
UDP 21	-	FTP
UDP 53	-	DNS
UDP 465	-	SMTP (TLS / SSL)

Please note that you should only open port 3306 if you wish to allow external connections to the MySQL service.

Outbound Port	Application
TCP 20	FTP
TCP 21	FTP
TCP 25	SMTP
TCP 26	SMTP
TCP 37	RDATE
TCP 43	WHOIS
TCP 53	DNS
TCP 80	HTTP
TCP 113	IDNET
TCP 465	SMTP (TLS / SSL)
TCP 873	RSYNC
TCP 2089	cPanel License
TCP 3306	MySQL (external connections)
UDP 21	FTP
UDP 53	DNS
UDP 465	SMTP (TLS / SSL)
UDP 873	RSYNC