If you are getting the 404 error for the http://IP address/~username
Then follow the below steps
>> Login to the WHM >> Main >> Security Center >> Apache mod_userdir Tweak
Apache’s mod_userdir allows users to view their sites by entering a tilde(~) and their username as the uri on a specific host. For example :: example.net/~fred/ will bring up the user fred’s domain. The disadvantage of this feature is that any bandwidth usage used by this site will be put on the domain it is accessed under (in this case test.cpanel.net). mod_userdir protection prevents this from happening. You may however want to disable it on specific virtual hosts (generally shared ssl hosts.)
>> Untick the option for the ” Enable mod_userdir Protection ”
>> Tick the option for the ” DefaultHost (nobody) ”
>> Save the settings and check for the effect.
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