PKI security realm lisence

[Yang_Wang]

PKI realm is Gold+ license (look for LDAP, PKI, Active Directory authentication on the subscription page.

If all you need is two way SSL, i.e. mutual TLS or mTLS, you don't need PKI realm. mTLS is available with basic.

There are quite a few other posts that are for this topic, e.g.:

• Mutual tls/ssl on elasticsearch
• Mutual tls/ssl on elasticsearch
  And the relevant settings are:
• Security settings in Elasticsearch | Elasticsearch Guide [7.x] | Elastic