In the JGroups configuration files we ship, we use a different default for TCP.bind_addr and UDP.bind_addr than JGroups does.

   <TCP bind_addr="${jgroups.bind.address,jgroups.tcp.address:SITE_LOCAL}"/>

   <UDP bind_addr="${jgroups.bind.address,jgroups.udp.address:SITE_LOCAL}"/>

However, we didn't change the default for FD_SOCK, so it uses the JGroups default: