Limit "clients" to ElasticSearch

Elastic Stack Elasticsearch
1

Hi,
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?

Thanks

2

Maybe this is the answer to my own question?
https://www.elastic.co/guide/en/x-pack/6.0/ip-filtering.html

3

Yep, that's the best option!