# Elastic operator TLS self-signed certificates
**URL:** https://discuss.elastic.co/t/elastic-operator-tls-self-signed-certificates/270049
**Category:** Elasticsearch
**Tags:** elastic-stack-security
**Created:** [April 13, 2021, 6:15pm UTC](https://discuss.elastic.co/t/elastic-operator-tls-self-signed-certificates/270049 "2021-04-13T18:15:09Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@ewolfman](https://discuss.elastic.co/u/ewolfman)
#### Post date: [April 13, 2021, 6:15pm UTC](https://discuss.elastic.co/t/elastic-operator-tls-self-signed-certificates/270049/1 "2021-04-13T18:15:09Z")
Hi,
Using ECK we have set up a cluster with a self-signed certificate.
However the documentation ([TLS certificates | Elastic Cloud on Kubernetes [1.5] | Elastic](https://www.elastic.co/guide/en/cloud-on-k8s/current/k8s-tls-certificates.html#k8s-default-self-signed-certificate)) is not clear how to set/install this certificate in the cluster so it'll be valid for calling clients **within the cluster** (java, .net, which are failing as they cannot validate the self-signed certificates).
Can you please provide guidance what should be the step for establishing the self-signed certificate as one that can be recognized by clients? For example, should we be validating it in the client code ([Encrypted communication | Java REST Client [7.12] | Elastic](https://www.elastic.co/guide/en/elasticsearch/client/java-rest/current/_encrypted_communication.html)). Or, must we generate a 'real' certificate to be used for this to work (as specified here: [TLS certificates | Elastic Cloud on Kubernetes [1.5] | Elastic](https://www.elastic.co/guide/en/cloud-on-k8s/current/k8s-tls-certificates.html#k8s-setting-up-your-own-certificate))
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [May 11, 2021, 6:15pm UTC](https://discuss.elastic.co/t/elastic-operator-tls-self-signed-certificates/270049/2 "2021-05-11T18:15:27Z")
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