How to get client Ip Address in Java HttpServletRequest

I am trying to develop a Java web application (Servlet) which I need to get clients IP address.

Following is my code so far:

String ipAddress =  request.getRemoteAddr();

In this case most of the time I get the 'Default gateway address' (147.120.1.5). Not my machine IP address(174.120.100.17).

String ipAddress = request.getHeader("X-FORWARDED-FOR");  
if (ipAddress == null) {  
    ipAddress = request.getRemoteAddr();  
}

In this case most of the time I get the 'Default gateway address' (147.120.1.5). Not my machine IP address (174.120.100.17).

InetAddress IP=InetAddress.getLocalHost();
System.out.println(IP.getHostAddress());

In this case I got the server IP Address (147.120.20.1).

My IP address in 147.120.100.17. Now I don't know how to get the real client IP address.

Thank you very much.

Solution

Try this one,

String ipAddress = request.getHeader("X-FORWARDED-FOR");  
if (ipAddress == null) {  
    ipAddress = request.getRemoteAddr();  
}