Server-side Configuration - server.xml - Connector bind address
6.3.2.3. Connector bind address In mod_cluster 1.0.x, you had the option of manually setting the connector bind address, to restrict the network interface on which mod_cluster would listen for proxied requests from the load balancer. In mod_cluster 1.1.x, this no longer necessary. mod_cluster will set the bind address automatically, based on the interface on which mod_cluster's internal connection was established.