elasticsearch/docs/reference/security/authentication/pki-realm.asciidoc
James Rodewig 255c9a7f95
[DOCS] Move x-pack docs to docs/reference dir (#99209)
**Problem:**
For historical reasons, source files for the Elasticsearch Guide's security, watcher, and Logstash API docs are housed in the `x-pack/docs` directory. This can confuse new contributors who expect Elasticsearch Guide docs to be located in `docs/reference`. 

**Solution:**
- Move the security, watcher, and Logstash API doc source files to the `docs/reference` directory
- Update doc snippet tests to use security

Rel: https://github.com/elastic/platform-docs-team/issues/208
2023-09-12 14:53:41 -04:00

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[role="xpack"]
[[pki-realm]]
=== PKI user authentication
You can configure {es} to use Public Key Infrastructure (PKI) certificates to
authenticate users. In this scenario, clients connecting directly to {es} must
present X.509 certificates. First, the certificates must be accepted for
authentication on the SSL/TLS layer on {es}. Then they are optionally
further validated by a PKI realm. See <<pki-realm-for-direct-clients>>.
You can also use PKI certificates to authenticate to {kib}, however this
requires some additional configuration. On {es}, this configuration enables {kib}
to act as a proxy for SSL/TLS authentication and to submit the client
certificates to {es} for further validation by a PKI realm. See
<<pki-realm-for-proxied-clients>>.
include::configuring-pki-realm.asciidoc[]