9300
Elasticsearch Transport
High RiskTCP — Database
Port Overview
Port Number
9300
Service Name
Elasticsearch Transport
Transport Protocol
TCP
Category
Database
Security Risk
High
Port Range
Registered (1024-49151)
What is Port 9300?
Elasticsearch inter-node transport protocol. Used for communication between nodes in an Elasticsearch cluster for data replication and coordination.
TCP
Database
Security Considerations
Port 9300 (Elasticsearch Transport) is classified as high risk. This port is a common target for automated scanning and brute-force attacks. If you must expose it, restrict access to known IP addresses.
Recommendation: Use firewall rules to whitelist trusted IPs. Enable rate limiting and intrusion detection.