Configuring firewall port access 

Which ports to open when nodes are protected by a firewall.

The following ports must be open to allow bi-directional communication between nodes, including certain Cassandra ports. Configure the firewall running on nodes in your Cassandra cluster accordingly. Without open ports as shown, nodes will act as a standalone database server and will not join the Cassandra cluster.

Public port
Port number. Description
22 SSH port
Cassandra inter-node ports
Port number. Description
7000 Cassandra inter-node cluster communication.
7001 Cassandra SSL inter-node cluster communication.
7199 Cassandra JMX monitoring port.
Cassandra client ports
Port number. Description
9042 Cassandra client port.
9160 Cassandra client port (Thrift).
9142 Default for native_transport_port_ssl, useful when both encrypted and unencrypted connections are required