I'm not sure which version you are looking at but the socket transport, which is the default in 1.0.x, requires tcp connections to be made back to the client, making it unsuitable for clients running in some kind of sandbox, e.g. jnlp or applets, where the security policy will typically not allow this. 1.2 will introduce a bisocket transport which doesn't require connections to be made back to the client. The bisocket is not available in 1.0.x View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4010057#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...