Someone has pointed their domain (www.bomberball.net) to the same IP as my domain (www.kapparate.com) , and Google is now showing the former when searching for Kapparate, rather than the latter. What's the best way to block requests coming from www.bomberball.net ?
You should put your actual web site in an Apache
If you are using name-based virtual hosts, like most people, then just ensure that the default virtual host appears first in your configuration. You can check your configuration with a command such as
See also Apache's examples for more information.
If you are using Plesk panel, you are exposing yourself to this site duplicate issue if you have a "default site" selected for your IP address under "Tools and settings > Ip addresses". That is... if you enter your IP in browser and you see your domain.
Fix this by selecting