Curated port reference

Port 9042: Apache Cassandra CQL

Apache Cassandra CQL commonly uses port 9042 over TCP. Review its purpose, traffic direction and operational security considerations.

9042TCP

Apache Cassandra CQL

Default Cassandra Query Language native client endpoint.

Typical use

Apache Cassandra CQL endpoints in environments where this service is explicitly configured.

Traffic direction

Client to server

Security considerations

Keep private, require authentication and TLS, and use least-privilege database roles.