Following Failes when Client and Server are different Domains:

 public IPmonHistorySupplier( String host, int port ) throws ServiceNotAvailableException {
 try {
 ServiceLocator serviceLocator = ServiceLocator.getInstance(host, port);

 System.out.println( new Date().toString() + " - getting home" );
 HistorySessionHome historyHome = ( HistorySessionHome )serviceLocator.getRemoteHome("HistorySession", HistorySessionHome.class);
 System.out.println( new Date().toString() + " - got home" );

 System.out.println( new Date().toString() + " - getting session" );
 historySession = historyHome.create();
 System.out.println( new Date().toString() + " - got session" );

 qcf = serviceLocator.getQueueConnectionFactory("ConnectionFactory");
 abortQueue = serviceLocator.getQueue("queue/IPmonGetHistoryAbortQueue");

 this.host = host;
 this.port = port;
 }
 /* Translate exceptions into ServiceNotAvailableException */
 catch (CreateException ex) {
 System.out.println( new Date().toString() + " - CreateException" );
 ex.printStackTrace();
 throw new ServiceNotAvailableException(ex);
 }
 catch (RemoteException ex) {
 System.out.println( new Date().toString() + " - RemoteException" );
 ex.printStackTrace();
 throw new ServiceNotAvailableException(ex);
 }
 catch (ServiceLocatorException ex) {
 System.out.println( new Date().toString() + " - ServiceLocatorException" );
 ex.printStackTrace();
 throw new ServiceNotAvailableException(ex);
 }
 catch (Exception ex) {
 System.out.println( new Date().toString() + " - Exception" );
 ex.printStackTrace();
 throw new ServiceNotAvailableException(ex);
 }
 }

the Home lookup works fine but the session request failes after exactly 3 min and 30 seconds. Strange is also that the home lookup needs 21 seconds.
Last Friday at 5 o'clock in the evening, when nearly everybody went home and the network had less traffic i was able to get a response from the session request.

Fri Apr 29 13:08:33 CEST 2005 - getting home
Fri Apr 29 13:08:54 CEST 2005 - got home
Fri Apr 29 13:08:54 CEST 2005 - getting session
Fri Apr 29 13:12:24 CEST 2005 - RemoteException
java.rmi.ConnectException: Connection refused to host: 195.160.9.35; nested exception is:
 java.net.ConnectException: Connection timed out: connect
 at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:567)
 at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:185)
 at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:171)
 at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:101)
 at org.jboss.invocation.jrmp.server.JRMPInvoker_Stub.invoke(Unknown Source)
 at org.jboss.invocation.jrmp.interfaces.JRMPInvokerProxy.invoke(JRMPInvokerProxy.java:118)
 at org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:163)
 at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:103)
 at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:46)
 at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:55)
 at org.jboss.proxy.ejb.HomeInterceptor.invoke(HomeInterceptor.java:169)
 at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:91)
 at $Proxy0.create(Unknown Source)
 at ch.eds.ipmonitor.server.client.IPmonHistorySupplier.<init>(IPmonHistorySupplier.java:66)
 at ch.eds.ipmonitor.client.history.HistoryFrame.<init>(HistoryFrame.java:177)
 at ch.eds.ipmonitor.client.controller.IPmonitorController.run(IPmonitorController.java:597)
 at java.lang.Thread.run(Thread.java:534)
Caused by: java.net.ConnectException: Connection timed out: connect
 at java.net.PlainSocketImpl.socketConnect(Native Method)
 at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:305)
 at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:171)
 at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:158)
 at java.net.Socket.connect(Socket.java:452)
 at java.net.Socket.connect(Socket.java:402)
 at java.net.Socket.<init>(Socket.java:309)
 at java.net.Socket.<init>(Socket.java:124)
 at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:22)
 at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:128)
 at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:562)
 ... 16 more

any idea what could be the cause of the problem ?

many thanks for any help.