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Ports & protocols

Port 9200 — Elasticsearch HTTP API

Common port for the Elasticsearch HTTP API.

TopicNetwork ports & protocols → About 1 min read

Port 9200 — TCP

Common port for the Elasticsearch HTTP API.

What is port 9200 used for?

Elasticsearch search and administration API access.

Transport protocol

TCP

Security precautions

Require authentication and access controls; avoid unprotected public exposure.

Should we open this port in the firewall?

Allow this port only when a required service uses it. Apply least privilege: restrict authorized sources, destinations and interfaces, and log connections where appropriate.

How do I check this port?

Test-NetConnection SERVER -Port 9200

On Linux, nc -vz SERVER 9200 checks TCP connectivity only. A successful TCP connection does not validate the application, authentication or TLS configuration.

Port-to-service mappings are common conventions. Applications can use a different configured port; confirm the actual service and transport.

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