This guide provides a step-by-step walkthrough for connecting Elasticsearch to external certificates issued by a Certificate Authority (CA).Generate a CSR for each node by creating a CSR configuration file and using the elasticsearch-certutil tool.Submit the CSR to an external CA for signing and collect the signed certificates.Import the CA certificate into the server's trust store and distribute the certificates to the nodes.Configure SSL/TLS in Elasticsearch by editing the elasticsearch.yml file and restart Elasticsearch to apply the changes.