Port 9200TCP
Current HTTP API of Elasticsearch.
What is the 9200 port for?
Database / search. The protocol or service generally associated is Elasticsearch HTTP API.
Transport Protocol
TCP
Safety precautions
Do not expose without authentication and control of, access.
Should we open this port in the firewall?
Only if a service is actually needed the use it. Apply the principle of any privilege: limit the authorized sources, destinations and interfaces, and then log connections when relevant.
How do I check this port?
Test-NetConnection SERVER -Port 9200Under Linux, you can use nc -vz SERVER 9200.
Port/service associations are common conventions. An application can be configured on another port.