The control panel runs on port 2082 so if you are behind a firewall or proxy server you might have trouble accessing your control panel if that port is blocked.
For some users who are on a LAN which the firewall is blocking the above outgoing port, they may by pass the above ports by installing CpanelProxy script into their Cpanel hosting account. This can be done easily with the following steps:
1. Create a subdomain namely cpanel / webmail in the Cpanel control panel
2. Download the CpanelProxy script from CpanelProxy sourceforge download page.
3. Once downloaded to your local terminal, unzip and upload it via FTP to the subdomain cpanel / webmail which you have setup in Steps 1.
4. Access your site via http://cpanel.yourdomain.com for the Cpanel, or http://webmail.yourdomain.com for Webmail.
Please be reminded that there is a possible security risk of enabling this feature on your hosting account. For every successful login attempt to the Cpanel control panel (without the CpanelProxy script), you will see a message "Last login from: xxx.xxx.xxx.xxx" where xxx.xxx.xxx.xxx is the IP address of the last user who login to the control panel on top of the Cpanel control panel. This is a security feature to keep track of the last login user to your Cpanel control panel.
However, with the installation of CpanelProxy script to your Cpanel account, the last login from IP will be always showing 127.0.0.1 which is a local IP. This will wipe off any foot steps of tracing in case your Cpanel control panel is being compromised.
As such, we would urge user who have this installed to only login with the CpanelProxy script on cases where TCP port 2082 / 2086 / 2095 are blocked on the LAN firewall and the administrator does not allow this bypass. User who have this installed may still access their cpanel using http://yourdomain.com/cpanel ( access via port 2082 ) or http://cpanel.yourdomain.com ( access via CpanelProxy script ).