How can I block my computer from accessing certain IPs in Windows 7?

I recently got gifted Counter Strike 1.6, but the game has a major flaw. There are tons and tons of redirect servers flooding the server browser making it quite difficult to find a good server. The current solutions I have found are to use a 3rd party tracker, which I don't want to do, or get a program called Fake Server Buster to block all the redirect servers. I've been running Fake Server Buster for hours and it still hasn't come up with any servers. My next idea is to just block the redirect server's IP, but idk how to do it and I am failing at Googling the solution.

Could you explain what a "redirect server" is?

host file: http://allthingsmarked.com/2006/08/28/ho...osts-file/ <- only goes up to XP
ref: http://en.wikipedia.org/wiki/Hosts_%28file%29
or use your router.

Could you explain what a "redirect server" is?

People setup tons and tons of fake counter strike servers that display false info and when you try to connect to them they will redirect you to their own server. They can run tons of them on one server by just hosting them on separate ports. For every IP I block I'll at least block like 10 fake servers. It is super annoying when you have to check every server's specific info to make sure it isn't a redirect server.

host file: http://allthingsmarked.com/2006/08/28/ho...osts-file/ <- only goes up to XP
ref: http://en.wikipedia.org/wiki/Hosts_%28file%29
or use your router.

The hosts file, as far as I know, doesn't really work with blocking specific IPs. I already found the domain of one of the redirect servers (it is is also running a Japanese DVD site) and I added that to the hosts file but I can still access it by its IP. I have a Trendnet TEW-632BRP router and I can't figure out how to block IPs using it. I can't find anything to setup the firewall to do so.