Name: rm29839 Date: 12/04/97


Applications exporting remote objects cannot be
used to send RMI-client calls through a firewall.
They simply ignore the properties like
http.proxyHost and generate a
NoRouteToHostException. The same application
without RMI-server support works well.

The problem can be demostrated by the following
code:

/**
 * This class sits on a server behind a
 * firewall while the host real.internet.name
 * can be reached only through that proxy.
 */
public class BugImpl extends UnicastRemoteObject
                     implements Bug {
    static {
        if ( System.getSecurityManager() == null )
            System.setSecurityManager( new RMISecurityManager() );
    }
 
    public BugImpl() throws RemoteException {
        super();
        System.getProperties().put( "http.proxySet" , "true" );
        System.getProperties().put( "http.proxyHost", "firewall" );
        System.getProperties().put( "http.proxyPort", "8080" );
        try {
            Registry reg = LocateRegistry.getRegistry();
            reg.rebind( "Bug", this );
            // The following line generate
            // a NoRouteToHostException.
            Naming.lookup( "//real.internet.name/RMIClass" );
        }
        catch( Exception e ) {
            System.err.println( "Exception: " + e.getMessage() );
        }
 
    }
  
    public String show() throws RemoteException {
        return "Tutto ok";
    }

}

public interface Bug extends Remote {
    public String show() throws RemoteException;
}
(Review ID: 21262)
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