Control Network Access to Services
An administrator must configure an Oracle Big Data Cloud Service cluster to control access from incoming network traffic. The configuration specifies whether requests from specified clients will be accepted or denied for services at specified ports. In a new cluster, all ports on all nodes are closed by default, except for port 22 (for SSH access), which is open on all nodes. Other nodes must be opened explicitly.
The following topics tell how to configure a cluster to control network access: