If you are getting the defaultwebpage.cgi page on your site, please read this.
This is an error commonly caused by a recent change to your hosting account's domain names. For example changing your main domain or parking a domain may cause this behaviour. It is also common with newly created accounts. How may however, still access cPanel even if your website is not available.
Under normal circumstances, we would expect the error to pass after around 48 hours, although in some cases this time can be longer. Before opening a support ticket about this issue, please wait a minimum of 24 hours, and clear your browser cache and flush your DNS at regular intervals.
If you are still having an issue after 24 hours, please open a support ticket and someone will investigate further.