How to set up mutual SSL authentication between an ELK server (Logstash) and a remote Filebeat server?

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I have tried OpenSSL several times and it does not work.

How to connect two servers to Filebeat?

I have 2 servers HTTPS with let's Encrypt : monitoring.example.com with ELK (IP: 11.11.111.111) www.example.com with my site in production (IP: 22.22.222.222) To install and configure ELK, I followed this tutorial : On the server monitoring.example.com I have this configuration : $ sudo nano /etc/nginx/sites-available/monitoring-example-com server { listen 80 default_server; listen [::]:80; server_name monitoring.example.com; location / { return 301 https://mon…