[support] Rules redirect

Hi all Our Drupal 7 site is under constant attack from the Chinese. In Rails there is an easy way to redirect pretty much anything off site or to other page/s not in the system and hide the url. Also is there a better way of hiding the url of user login I have tried to set up Rules in Drupal 7 to simply redirect [Page not found] responses back to the front page or better still out of the Drupal 7 system completely. I've had no success. Can someone please direct me on how to set up such a Rule on our site. Thanks in advance Roger