cPanel User Manual 

 This will be reached when the user has failed to authenticate their self properly 

when trying to access a restricted page.

403 

This will be reached when access is forbidden to the page the user to trying to 

access. 

404 

 This will be reached when a user misspells a url to a page they are trying to 

access. It is important to be helpful with your 404 error page or the user may 

decide to leave your site. 

500 

 This will be reached when the page cannot be displayed. This can occur when a 

script fails to run, or under other circumstances. You should have the user 

contact the site administrator when this page is shown. 

Troubleshooting 

Make sure to be friendly and helpful when creating custom error pages so your 

users stay at your web site rather than leaving when an error is found. 

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