Once the cluster is provisioned, you can update firewall rules to specify individual hosts and networks that can connect to the cluster.
1. On the Cluster Overview page, click Cluster Settings from Manage Cluster menu of your cluster.
2. On the Settings page, add and update IP addresses to Cassandra Allowed Addresses, Elassandra REST API Allowed Addresses and Kibana Allowed Addresses. Addresses listed in these sections will be allowed to connect to the respective application ports. Once all the required IP address are added, click the Save Cluster Settings button.