# Error Fleet Server - Error - x509: cannot validate certificate for x.x.x.x because it doesn't contain any IP SANs

**URL:** <https://discuss.elastic.co/t/error-fleet-server-error-x509-cannot-validate-certificate-for-x-x-x-x-because-it-doesnt-contain-any-ip-sans/282170>\
**Category:** Kibana\
**Tags:** fleet\
**Created:** [August 22, 2021, 6:17pm UTC](https://discuss.elastic.co/t/error-fleet-server-error-x509-cannot-validate-certificate-for-x-x-x-x-because-it-doesnt-contain-any-ip-sans/282170 "2021-08-22T18:17:09Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![ruflin](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ruflin/32/3116_2.png) [@ruflin](https://discuss.elastic.co/u/ruflin)\
**Post date:** [August 23, 2021, 10:36am UTC](https://discuss.elastic.co/t/error-fleet-server-error-x509-cannot-validate-certificate-for-x-x-x-x-because-it-doesnt-contain-any-ip-sans/282170/2 "2021-08-23T10:36:41Z")

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I wonder if this thread here could be interesting in this context? [Is there a way to ease installing fleet server to a elasticsearch server secured by self-signed certificate](https://discuss.elastic.co/t/is-there-a-way-to-ease-installing-fleet-server-to-a-elasticsearch-server-secured-by-self-signed-certificate/281583)

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_[View the full topic](https://discuss.elastic.co/t/error-fleet-server-error-x509-cannot-validate-certificate-for-x-x-x-x-because-it-doesnt-contain-any-ip-sans/282170)._