Limit "clients" to ElasticSearch

Is there a way to limit who can send data to elasticsearch in elasticsearch config?
I will be using Logstash and want to limit so no one else can send data to elasticsearch.

Yes, the security part will partly solve that.

Or do i have to do that in my elasticsearch host firewall?


Maybe this is the answer to my own question?

Yep, that's the best option!

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