Java APIs

Hey everyone,

I have an RMI server running on a server. When a client is located on the same machine as the server, it is able to connect to it fine. However, when the client is remote, it is unable to do so. I poked around the internet a bit, and came across "-Djava.rmi.server.hostname" for setting up the server's ip address correctly. I've tried to get that to work but with no luck. I think that I may be creating the RMI registry wrong, or perhaps just using the command wrong. Any help on this would be great.

import java.io.*;
import java.net.*;
import java.rmi.*;
import java.rmi.server.*;
import java.rmi.registry.Registry;
import java.rmi.registry.LocateRegistry;
import java.rmi.RMISecurityManager;

public class Server {

    public static void main(String args[]) {
		 settings st = new settings();
       InputStreamReader is = new InputStreamReader(System.in);
       BufferedReader br = new BufferedReader(is);

       String portNum, registryURL;

       try {
            //Start the RMI registry on port 7504
            startRegistry(7504);

            // Create the rmi object and register is with the rmi registry.
            rmiImpl rmi = new rmiImpl();
            registryURL = "rmi://localhost:7504/pss";
            Naming.rebind(registryURL, rmi);
            System.out.println("RMI server started...");

        } catch (Exception e) {
            System.out.println
                ("Server.main: an exception occurred: " + e.getMessage());
            e.printStackTrace();
        }
    }

    public static void startRegistry(int RMIPortNum) throws RemoteException {
      try {
         Registry registry = LocateRegistry.getRegistry(RMIPortNum);
         registry.list();
      }
      catch (RemoteException e) {
         Registry registry = LocateRegistry.createRegistry(RMIPortNum);
      }
    }
}

When I launch the server, I do:

sudo java -Djava.rmi.server.hostname=<outward IP> Server

Also, I've checked to make sure the port if forwarded correctly at the router.

Thanks Everyone,
vital_101