// REFERENCE
Port 9300 (Elasticsearch nodes)
Protocol: TCP
Service: ES transport
High risk
The node-to-node transport port of Elasticsearch (not the REST API, which is 9200). Exposed it allows joining the cluster; keep it strictly on the cluster's internal network.
Related tools
Work with this in:
Related
1433
Port 1433 (MS SQL Server) 1434
Port 1434 (MS SQL Monitor) 1521
Port 1521 (Oracle DB) 2181
Port 2181 (ZooKeeper) 3306
Port 3306 (MySQL / MariaDB) 5432
Port 5432 (PostgreSQL)
Port 1433 (MS SQL Server) 1434
Port 1434 (MS SQL Monitor) 1521
Port 1521 (Oracle DB) 2181
Port 2181 (ZooKeeper) 3306
Port 3306 (MySQL / MariaDB) 5432
Port 5432 (PostgreSQL)
Assignments per the IANA port registry. Educational content.