Welcome to WebmasterWorld Guest from 188.8.131.52
(never done it before and not sure what it's for)
The best place to educate yourself in these matters is right here on this site. That's how I started, anyway. Click the search link at the top of the page and do a search for .htaccess. Once you have your own .htaccess file set up, be sure to include this line:
deny from 24.77.72.
Good luck and let us know how it goes.
I think you will find all the help you need (and then some!) here.
As noted above, you can start by adding a couple of wquick lines to an .htaccess file, and you are started! But oince you ban one, you will find others.... and it will slowly become an obsession!
While .htaccess works fine... if you have access to httpd.conf, you can also do the bans there... works a littl ebit faster there...
Good luck, and post if you need ANY help!