# SSL installation

**URL:** <https://discuss.elastic.co/t/ssl-installation/196321>\
**Category:** Elasticsearch\
**Tags:** elastic-stack-security\
**Created:** [August 22, 2019, 12:28pm UTC](https://discuss.elastic.co/t/ssl-installation/196321 "2019-08-22T12:28:22Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![gsece](https://avatars.discourse-cdn.com/v4/letter/g/ecb155/32.png) [@gsece](https://discuss.elastic.co/u/gsece)\
**Post date:** [August 22, 2019, 12:28pm UTC](https://discuss.elastic.co/t/ssl-installation/196321/1 "2019-08-22T12:28:23Z")

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If I have 3 node cluster, do I need to get 3 separate node specific CA certificate or can I get one CA certificate and apply in all three servers? which one is the best practice..

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**Author:** ![spinscale](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/spinscale/32/25011_2.png) [@spinscale](https://discuss.elastic.co/u/spinscale)\
**Post date:** [August 23, 2019, 7:23am UTC](https://discuss.elastic.co/t/ssl-installation/196321/2 "2019-08-23T07:23:58Z")

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Each node should have it's own specific certificate created by a single CA - which you can optionally also create.

You might want to read [https://www.elastic.co/guide/en/elastic-stack-overview/7.3/encrypting-communications.html](https://www.elastic.co/guide/en/elastic-stack-overview/7.3/encrypting-communications.html) and the next pages describing the whole process of setting this up.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [September 20, 2019, 7:23am UTC](https://discuss.elastic.co/t/ssl-installation/196321/3 "2019-09-20T07:23:59Z")

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