[support] Blocking Acess with IP

[Jorge Biquez]

Hello all.
I am sorry for jumping to strange (maybe) questions.

In my test site I start receiving intents of hacking. Until now 
everything they have tried on the server and the configuration has 
resisted. Maybe this sound ridiculous but I was wondering this:
Is there any chance to block entire countries, a module maybe by IP?

I know Drupal 7 has an option to block by IP but that is not enough. 
I mean an attacker can change the IP (Yes I know nothing is secure). 
IN my case people from Korea or China (with all respect) are not 
people interested in my content and most of the attacks came from 
those and other countries. So I would like to block them

What do you do to avoid those kind of attacks?
Any module you know beside the option included to block entire countries?

I once saw in one Open source software (a shopping cart) an option , 
a module let's say, that you could install that let you download a 
file (I did it) and they use that file , big one) with the module to 
block entire countries completely,.

Thanks in advance for the comments and I am sorry if some questions 
could sound....s..trange

Jorge Biquez