In my web application I need to extract the real ip address for clients behind proxy, after searching I found that the possible method to do that is to read the content of "X\_FORWARDED\_FOR" header , I am using java servlet and the headers of the incoming request doesn't contain "X\_FORWARDED\_FOR" header , So why the header doesn't included in the request?

I am using java 1.7 , tomcat v7 , proxy server :TMG and configured to use "X\_FORWARDED\_FOR" header .

Please advice.

Thanks in advance.