Configuring firewall port access
If you have a firewall running on the nodes in your Cassandra cluster, you must open up the following ports to allow communication between the nodes, including certain Cassandra ports. If this isn’t done, when you start Cassandra on a node, the node acts as a standalone database server rather than joining the database cluster.
|Public Facing Ports
||OpsCenter website port.
|Cassandra Inter-node Ports
||JMX reconnection/loopback ports. See description for port 7199.
||Cassandra inter-node cluster communication.
||Cassandra JMX monitoring port. After the initial handshake, the
JMX protocol requires that the client reconnects on a randomly
chosen port (1024+).
||Cassandra client port (Thrift).
||OpsCenter monitoring port. The opscenterd daemon listens on this
port for TCP traffic coming from the agent.
||OpsCenter agent port. The agents listen on this port for SSL
traffic initiated by OpsCenter.