website doesn't load
You don't go into any detail about what the page won't load means.  Is there an error that is being displayed by the browser?  If so what is it?  In this case it is likely that you are getting some kind of http error code back from the server, or the request is timing out.

You may want to look at your server's fail2ban log.  If Fail2ban is enabled, it is possible that your ip address has been blocked.

Is there an error in a web page?  Do you get a blank page?  If so, does viewing page source show anything?  

Errors in the web page are much more likely an sign of something coming from drupal.  Though http error codes could easily be coming from drupal too.  

If you use the developer tools in whatever browser you are using to look at the request and response headers what do you see?  

This will give you a clearer view of what is being requested and what the server is answering?

Do you see anything in your server's error log?  Does anything show up in the access log?  This will give you a clearer view of whether the request is reaching your web server at all.  If you see no request in either the access or error logs, it is a reasonably good bet that you are being blocked at the firewall level (this includes fail2ban) or that you have some local dns setting that is causing your request to go to the wrong place.  (This could be something in your /etc/hosts)