How to trace Client IP address

[Sam Jimzz]

How can i trace the users IP address from a web application.. i tried with some existing methods in java. but its showing servers ip address..

How can i solve it..?

[Tim Moores]

The HttpServletRequest object has methods to get the remote IP address. If you get "127.0.0.1" or some other local IP address, ask your server admin whether there's some kind of forwarding going on (also google for "x-forwarded-for" in that case).

[Sam Jimzz]

Tim Moores wrote:The HttpServletRequest object has methods to get the remote IP address. If you get "127.0.0.1" or some other local IP address, ask your server admin whether there's some kind of forwarding going on (also google for "x-forwarded-for" in that case).

yes..i tried with 2-3 methods in HttpServletRequest. but still in vain. we have two servers for balancing the load,while executing the code,its just retrieving the proxy address.

[Rob Spoor]

Then you must set up your load balancers to forward the actual client's IP address.

[Sam Jimzz]

Rob Spoor wrote:Then you must set up your load balancers to forward the actual client's IP address.

Is there any other way(3rd party packages,api) to catch the IP address without disturbing load balancers config.?

[Tim Moores]

The use of x-forwarded-for is the standard way to do this. Have you checked that it's not being used (and thus available to your servlet) already?

[Sam Jimzz]

Tim Moores wrote:The use of x-forwarded-for is the standard way to do this. Have you checked that it's not being used (and thus available to your servlet) already?

Yes i tried with the following code.,

String remoteAddr = request.getRemoteAddr();
       String x;
        if ((x = request.getHeader("X-FORWARDED-FOR")) != null) {
            remoteAddr = x;
            int idx = remoteAddr.indexOf(',');
            if (idx > -1) {
                remoteAddr = remoteAddr.substring(0, idx);
            }
        }
        out.println(remoteAddr);

But still getting the same address(server IP)..

[Tim Moores]

You need to have a chat with your server admin, then.