I'm not sure what this question has to do with JBoss Messaging. JBM doesn't use IIOP. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4048931#4048931 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4048931