Who are you trying to cloak it from is the big question, You can always find a proxy server that does not forward IP's and that will mask your IP from WEBPAGES ONLY..and thats only if the webpage is on port 80, any type of activity like ftp or such would show your ip
It would be alot more beneficial of you to just get a firewall and not worry about cloaking your ip if your deathly afraid someone is going to try and hack you or something
And depending what you do, you expose your IP alot..any type of file sharing app exposes your ip, ftp, telnet, direct connect IM's
so who ya hiding from 🙂