ElasticSearch Security and Ports <p>I have setup an elastic-search cluster with two data nodes , one master node and one client node with KIBANA. </p> <p>I was running it with iptables disabled on each node (CC 6). Now i need to enable iptables and i want to know which of the ports (9200 , 9300) , i need to open on each node and in which direction (incoming or outgoing). The discovery is using uni-cast. </p> <p>I would also like to know on which node i should place authentication , i.e just the client node ?</p> <pre><code> Cluster: mycluster data-node1 data-node2 master-node1 client-node1 </code></pre> <p>Thanks.</p>