Port 9300 — Elasticsearch Transport

TCP · Port 9300/TCP is used for the Elasticsearch Transport service, which enables communication between nodes in an Elasticsearch cluster. This port is critical for cluster management and data replication. Its security relevance lies in ensuring secure communication within the cluster.

Port Number: 9300
Service Name: Elasticsearch Transport
Protocol: TCP
Common Software: Elasticsearch

Security Notes

Review IANA registry for port 9300 usage. Apply principle of least privilege - only open ports that are required.

FAQ

What is port 9300 used for?

Port 9300 is used for Elasticsearch Transport. Port 9300/TCP is used for the Elasticsearch Transport service, which enables communication between nodes in an Elasticsearch cluster. This port is critical for cluster management and data replication. Its security relevance lies in ensuring secure communication within the cluster. Common software: Elasticsearch.

Is port 9300 dangerous to leave open?

Review IANA registry for port 9300 usage. Apply principle of least privilege - only open ports that are required.

How do I check if port 9300 is open?

Use nmap: nmap -p 9300 <target> or check locally: ss -tlnp | rg 9300