Configuring firewall port access
Which ports to open when nodes are protected by a firewall.
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.
|8888||OpsCenter website. The opscenterd daemon listens on this port for HTTP requests coming directly from the browser.|
|1024+||JMX reconnection/loopback ports. See description for port 7199.|
|7000||Cassandra inter-node cluster communication.|
|7199||Cassandra JMX monitoring port. After the initial handshake, the JMX protocol requires that the client reconnects on a randomly chosen port (1024+).|
|9160||Cassandra client port (Thrift).|
|61620||OpsCenter monitoring port. The opscenterd daemon listens on this port for TCP traffic coming from the agent.|
|61621||OpsCenter agent port. The agents listen on this port for SSL traffic initiated by OpsCenter.|