Okay, the 0.0.0.0:45566 (for example) addresses you referred to are IP multicast addresses, and netstat or TcpView doesn't show the bind address, but instead 0.0.0.0 for the class D address (should show 230.1.2.3 instead)... To check whether the other (JGroups related) ports bind correctly, check in the output: 15:37:31,296 INFO [DefaultPartition] Initializing 15:37:31,359 INFO [STDOUT] ------------------------------------------------------- GMS: address is 192.168.5.2:4371 ------------------------------------------------------- 15:37:33,375 INFO [DefaultPartition] Number of cluster members: 1 Then do a "netstat -na |grep 4371", and you'll see $ netstat -an |grep 4371 UDP 192.168.5.2:4371 *:* That it is bound to the right interface (I started JBoss with "./run.sh -b 192.168.5.2 -c all") View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3962842#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...