# Warm node is failing to connecting with master node

**URL:** <https://discuss.elastic.co/t/warm-node-is-failing-to-connecting-with-master-node/322522>\
**Category:** Elasticsearch\
**Created:** [January 5, 2023, 8:48am UTC](https://discuss.elastic.co/t/warm-node-is-failing-to-connecting-with-master-node/322522 "2023-01-05T08:48:25Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![rahul\_sirugudi](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rahul_sirugudi/32/94019_2.png) [@rahul\_sirugudi](https://discuss.elastic.co/u/rahul_sirugudi)\
**Post date:** [January 5, 2023, 8:48am UTC](https://discuss.elastic.co/t/warm-node-is-failing-to-connecting-with-master-node/322522/1 "2023-01-05T08:48:25Z")

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I am migrating single-node cluster to multi node. I have started up with setting up basic security on master node using this link.

> **[Set up basic security for the Elastic Stack | Elasticsearch Guide \[7.17\] |...](https://www.elastic.co/guide/en/elasticsearch/reference/7.17/security-basic-setup.html)**

As mentioned in point 2 i have copied the output file to the warm node and i have saved the password used for it using keystore how ever i am seeing warnings on the newly added node as follows.

```auto
[2023-01-05T08:41:17,651][WARN][o.e.c.s.DiagnosticTrustManager] [ip-10-0-63-228] failed to establish trust with server at [10.0.62.242]; the server provided a certificate with subject name [CN=instance] and fingerprint [1dc00a7e2beb808224b7b5aca01618a379183f16]; the certificate does not have any subject alternative names; the certificate is issued by [CN=Elastic Certificate Tool Autogenerated CA]; the certificate is signed by (subject [CN=Elastic Certificate Tool Autogenerated CA] fingerprint [514ad69b5a3382dba2d1ccbd698ab144ac57207c] {trusted issuer}) which is self-issued; the [CN=Elastic Certificate Tool Autogenerated CA] certificate is trusted in this ssl context ([xpack.security.transport.ssl])
java.security.cert.CertificateException: No subject alternative names present

```

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<div class="post-metadata">

**Author:** ![rahul\_sirugudi](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rahul_sirugudi/32/94019_2.png) [@rahul\_sirugudi](https://discuss.elastic.co/u/rahul_sirugudi)\
**Post date:** [January 5, 2023, 11:33am UTC](https://discuss.elastic.co/t/warm-node-is-failing-to-connecting-with-master-node/322522/2 "2023-01-05T11:33:26Z")

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my bad i am able to fix the issue. All that i am missing is this configuration line in the warm node

> xpack.security.transport.ssl.verification\_mode: certificate

after adding it in both nodes it started connecting fine.

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [February 2, 2023, 11:33am UTC](https://discuss.elastic.co/t/warm-node-is-failing-to-connecting-with-master-node/322522/3 "2023-02-02T11:33:57Z")

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