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<div align=justify>When using Internet for accessing cPanel, Webmail or sending an email message you are using IP addresses together with the server ports. A server port number is part of the addressing information which helps to identify the senders and receivers of messages. In other words, a computer port is a type of electronic, software- or programming-related point through which information is delivered to your computer from the Internet or vice versa. The following port number range is generally used in hosting:

* '''''21 - File Transfer Protocol (FTP)'''''

* '''''22 - Secure Shell (SSH)'''''

* '''''23 - Telnet'''''

* '''''25 - Simple Mail Transfer Protocol (SMTP)'''''

* '''''80 - Hypertext text transfer protocol (HTTP)'''''

* '''''110 - Post Office Protocol(POP3)'''''

* '''''443 - Secure socket layer (SSL)''''''

* '''''465 - SMTP (for SSL)'''''

* '''''993 - IMAP (for SSL)'''''

* '''''2082/2083 - Control panel'''''

* '''''2095/2096 - Webmail'''''


For example, a request from your PC to a server on the Internet may request a file to be processed from that host via File Transfer Protocol (FTP). In order to pass your request to the FTP process in the remote server, your computer identifies the server port number of 21 (which is associated with FTP).

The port number range varies from 0 to 65535, but the well-known ports are the ones from 1 to 1023. Generally all server ports are classified into 3 main categories:

* Well Known Ports (Port numbers 0 - 1023)
* Registered Ports (Port numbers1024 - 49151)
* Private or Dynamic Ports (Port numbers 49152 - 65535)</div>
Return to Server Ports.
Retrieved from "http://myidealhost.com/tutorials/Server_Ports"
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