With your Linux Shared Hosting accounts, you have access to a control panel that contains the admin functions of your account.
Generally you would access this using the following syntax:
http://yourdomain.com/cpanel
This URL would change to
http://yourdomain.com:2082
This URL causes a problems for some owners, as it attempts to connect to port 2082. This is an uncommon port and may be blocked by corporate and public firewalls, thus preventing access.
If you are unable to access your cPanel using the above URL, you can now access it using the following syntax:
http://cpanel.yourdomain.com
This syntax does not connect using an uncommon port, and will allow you access. The same rules apply for Webmail and WHM.
http://whm.yourdomain.com
http://webmail.yourdomain.com
NOTE: You must use our nameservers (or nameservers which resolve to your our server) in order to use these "proxy" URLs. Otherwise, you will need to create A records for each subdomain so they point to your our server.