client ip through anonymous proxy server

[umasankar puranam]

hi,

Can anybody suggest on the below

How to get the client ip if its in anonymous proxy server?

if (request.getHeader("HTTP_X_FORWARDED_FOR") == null) {
String ipaddress = request.getRemoteAddr();
} else {
String ipaddress = request.getHeader("HTTP_X_FORWARDED_FOR");
}

But if the proxy is an anonymous proxy, then even this won't work.

[Ben Souther]

You can only see what's sent to you.
If the proxy doesn't send the client's IP then you can't see it.