Ususally out of the box it's port 1099. In server.log if you look for 1099 or whatever port the jnp server is supposed to bind to you should see the address/location. Can you post the entire stacktrace for the error it throws at you? Off the top of my head it could be a binding problem - if you bind jboss to a particular domain, it'll generally only listen for that address. If it binds to 127.0.0.1, I think it'll bind to all addresses.