Use a firewall that runs in "stealth mode". Nearly every firewall does this, you can use Ip hiding software and proxys also. Hide IP Platinum is effective.
Zone Alarm Free Best free firewall around, easy to set up, simple to use and really effective. http://www.download.com/3000-2092-10039884.html Every site you visit can see your IP, a firewall stops intruders from addressing you from it, proxys like http://www.frastproxy.com/ can be used to hide your IP addy, so will stuff like Hide IP Platinum.
so the firewall, will just protect me from websites seeing my ip addy? i need more software so users won't see it also?
The firewall covers that. Websites can see your IP, you can hide it with proxys and IP hiding software. By using ZA firewall, you've achived that.
Rav is right Za is the best free firewall. You call also use Peerguardian 2 that also blocks ip addresses, and is also free.