[support] Rules redirect

[Roger]

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