What is proxy how we can use?
When you connect to a web site, it can see your IP address as the "Remote IP" or "Remote Address". When you surf through a proxy server, these fields contain the IP address of the proxy server instead of your own IP address. So the web site will see the address of the proxy instead of your actual address.But all non-anonymous proxies usually put the IP addresses of their clients (i.e. of the computers using those proxies) in either of the two following request headers (variables): "HTTP_CLIENT_IP" or "HTTP_X_FORWARDED_FOR_IP" There are no strict standards, so one proxy may be sending the IP with "Client_IP" variable and another with "X_Forwarded_For_IP".
Re: free proxy
Also google proxy list for a list of very good anon proxies.
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