i want to restrict the user to login my web applicate twice with different LoginID from the same machine, But i found no way to trace client's IP add to restrict the second login request. Can anybody help me!:(

Have never done this myself, but I believe you can use:

request.getRemoteAddr() or request.getRemoteHost()

I lifted this from another forum where the poster commented that this would not work if the client was behind a firewall.

I tried this code but if user is behind any proxy or firewall then it return the IP of that proxy, and that is i wont to do!
some other way to track that client?:(