# AWS Elasticsearch EC2 instance cannot see each other when xpack security turned on

**URL:** https://discuss.elastic.co/t/aws-elasticsearch-ec2-instance-cannot-see-each-other-when-xpack-security-turned-on/191168
**Category:** Elasticsearch
**Created:** [July 18, 2019, 9:24am UTC](https://discuss.elastic.co/t/aws-elasticsearch-ec2-instance-cannot-see-each-other-when-xpack-security-turned-on/191168 "2019-07-18T09:24:50Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![duc](https://avatars.discourse-cdn.com/v4/letter/d/e79b87/32.png) [@duc](https://discuss.elastic.co/u/duc)
#### Post date: [July 18, 2019, 9:24am UTC](https://discuss.elastic.co/t/aws-elasticsearch-ec2-instance-cannot-see-each-other-when-xpack-security-turned-on/191168/1 "2019-07-18T09:24:50Z")

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Hello,  
Im working on EC2 instances and deploying elasticsearch v6.8 on them. My config is as follow:

Node1:

> cluster.name: \<cluster\_name\>  
> node.name: \<node1\_name\>
> 
> node.master: true  
> node.data: true  
> node.ingest: true
> 
> discovery.zen.hosts\_provider: ec2  
> discovery.zen.ping.unicast.hosts: [\<node1\_private\_ipv4\>, \<node2\_private\_ipv4\>]
> 
> discovery.ec2.endpoint: [ec2.ap-southeast-1.amazonaws.com](http://ec2.ap-southeast-1.amazonaws.com)  
> discovery.ec2.protocol: http
> 
> network.host: [\<node1\_private\_ipv4\>]

Node2:

> cluster.name: \<cluster\_name\>  
> node.name: \<node2\_name\>
> 
> node.master: true  
> node.data: true  
> node.ingest: true
> 
> discovery.zen.hosts\_provider: ec2  
> discovery.zen.ping.unicast.hosts: [\<node1\_private\_ipv4\>, \<node2\_private\_ipv4\>]
> 
> discovery.ec2.endpoint: [ec2.ap-southeast-1.amazonaws.com](http://ec2.ap-southeast-1.amazonaws.com)  
> discovery.ec2.protocol: http
> 
> network.host: [\<node2\_private\_ipv4\>]

This works fine. If I add

> xpack.security.enabled: true

then 2 nodes cannot find each other.  
Thank you for your help

---

<div class="post-metadata">

### Author: ![duc](https://avatars.discourse-cdn.com/v4/letter/d/e79b87/32.png) [@duc](https://discuss.elastic.co/u/duc)
#### Post date: [July 19, 2019, 8:30am UTC](https://discuss.elastic.co/t/aws-elasticsearch-ec2-instance-cannot-see-each-other-when-xpack-security-turned-on/191168/2 "2019-07-19T08:30:15Z")

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Ok, I resolved this problem by deploying TLS/SSL as instructed [here](https://www.elastic.co/blog/elasticsearch-security-configure-tls-ssl-pki-authentication)  
Any admin/mod please close this topic.

Thanks

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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: [August 16, 2019, 8:30am UTC](https://discuss.elastic.co/t/aws-elasticsearch-ec2-instance-cannot-see-each-other-when-xpack-security-turned-on/191168/3 "2019-08-16T08:30:23Z")

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