I use sun's J2sdkee1.3.1 to as my Naming server and JMS server. I start it in one machine( named A), and start my JMS application in another machine(named B). I want to know how to config the jndi.properties in machine B. Which attributes should I use , "java.naming.provider.url" OR "com.sun.jms.internal.java.naming.provider.url"? And what value should be set to it? In addtion,is it necessary to put config/orb.properties to machine B? I am looking forwards to your reply. Thanks in advance.