# Missing Authentication for REST request

**URL:** <https://discuss.elastic.co/t/missing-authentication-for-rest-request/154807>\
**Category:** Elasticsearch\
**Tags:** elastic-stack-security\
**Created:** [October 31, 2018, 10:12am UTC](https://discuss.elastic.co/t/missing-authentication-for-rest-request/154807 "2018-10-31T10:12:37Z")\
**Posts on this page:** 1\
**Showing post:** 13

<div class="post-metadata">

**Author:** ![ikakavas](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ikakavas/32/34430_2.png) [@ikakavas](https://discuss.elastic.co/u/ikakavas)\
**Post date:** [November 1, 2018, 2:01pm UTC](https://discuss.elastic.co/t/missing-authentication-for-rest-request/154807/13 "2018-11-01T14:01:43Z")

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1. You need to set `xpack.security.http.ssl.client_authentication` to either `optional` or `required` as instructed in the [documentation](https://www.elastic.co/guide/en/elasticsearch/reference/6.4/configuring-pki-realm.html) I have shared earlier:

2. You have set

When your Elasticsearch configuration is completed, please try to verify it with curl as such

```auto
curl --cert cert.crt --key cert.key --cacert cert.crt 'https://localhost:9200/_xpack/security/_authenticate?pretty'

```

before focusing again on your client side code.

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_[View the full topic](https://discuss.elastic.co/t/missing-authentication-for-rest-request/154807)._