Problem: Server IP = XXX.nnn.nn.nn Client jndi.properties file: jndi.CommandDispatcher=ejb/SessionBeanName java.naming.provider.url=jnp://YYY.nnn.nn.nn:1099 java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory Client uses server through NAT (Network Address Translation) and YYY.nnn.nn.nn is translated to server real ip XXX.nnn.nn.nn. Error: javax.naming.CommunicationException [Root exception is java.rmi.ConnectException: Connection refused to host: XXX.nnn.nn.nn. Solution that works with that client: Server side: - We added on the server side to run.sh file following directive: -Djava.rmi.server.hostname=server.company.com Client side: - We added swt-client to start with directive -Djava.rmi.server.hostname=server.company.com. - We adeed one line to the workstations hosts file: YYY.nnn.nn.nn server.company.com - we changed jndi.properties file: java.naming.provider.url=jnp://server.company.com:1099 After these changes it works ok with that client but not with other clients which are connecting to server directly with real ip XXX.nnn.nn.nn. Is there solution for both client types without using name-service ? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4126906#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...