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 DataStax Distribution of Apache Cassandra™ (DDAC) ports. Configure the firewall running on nodes in your cluster accordingly. Without open ports as shown, nodes will act as a standalone database server and will not join the DDAC cluster.

Table 1. Public port
Port number. Description
22 SSH port
Table 2. DDAC inter-node ports
Port number. Description
7000 DDAC inter-node cluster communication.
7001 DDAC SSL inter-node cluster communication.
7199 DDAC JMX monitoring port.
Table 3. DDAC client ports
Port number. Description
9042 DDAC client port.
9160 DDAC client port (Thrift).
9142 Default for native_transport_port_ssl, useful when both encrypted and unencrypted connections are required