A proxy is defined as: — nacomputerthatactsasanintermediarybetween aclientmachineandaserver,cachinginformationtosave access .
So what a proxy does is hide your I.P. (short for Internet Protocol) and use the servers I.P. Use High-Anonymity or Elite proxies, as the transparent ones are useless.. Also, use proxies of port 8080 or 80. Ports with 3128 do not allow you to log in. Just Google 'Free Proxy', and you should get quite a few hits.