Capturing of IP Address through Java Code

Dear All,

I have a situation in my Webdynpro Java Application where I have to capture the IP address of the end user's PC. I use the below code for capturing IP:

IWDRequest req = WDProtocolAdapter.getProtocolAdapter().getRequestObject();

String ipAddress = req.getClientHostName();

The problem is, the code is working perfectly in Quality system, but not in Production system. The IP which is captured in the Production system is the Portal IP itself. Is the problem has to do with some Network settings or the code has to be changed?