# Elasticsearch nodes
**URL:** https://discuss.elastic.co/t/elasticsearch-nodes/78346
**Category:** Elasticsearch
**Created:** [March 13, 2017, 1:30pm UTC](https://discuss.elastic.co/t/elasticsearch-nodes/78346 "2017-03-13T13:30:58Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@ArjunSISA](https://discuss.elastic.co/u/ArjunSISA)
#### Post date: [March 13, 2017, 1:30pm UTC](https://discuss.elastic.co/t/elasticsearch-nodes/78346/1 "2017-03-13T13:30:58Z")
hi guys,
I need to know if it is possible to connect two elasticsearch nodes and if so which port can be used to do so?
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### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [March 13, 2017, 2:32pm UTC](https://discuss.elastic.co/t/elasticsearch-nodes/78346/2 "2017-03-13T14:32:50Z")
From what? From where?
Can you explain a bit more?
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### Author:  [@slinky](https://discuss.elastic.co/u/slinky)
#### Post date: [March 13, 2017, 2:46pm UTC](https://discuss.elastic.co/t/elasticsearch-nodes/78346/3 "2017-03-13T14:46:21Z")
Edit the _elasticsearch.yml_ on both nodes:
- Make sure '_[cluster.name](http://cluster.name)_' is the same on both nodes;
- Let '_discovery.zen.ping.unicast.hosts_' point to each others IP addresses;
Format: `discovery.zen.ping.unicast.hosts ["xxx.xxx.xxx.xxx"]`
- Set '_network.host_' to their own IP address and make sure in your firewall they only allow each other to connect to port 9200.
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### Author:  [@ArjunSISA](https://discuss.elastic.co/u/ArjunSISA)
#### Post date: [March 14, 2017, 7:47am UTC](https://discuss.elastic.co/t/elasticsearch-nodes/78346/4 "2017-03-14T07:47:19Z")
hi David,
To further clarify my question:
> company has two different locations, say DC & DR, both these locations have elasticsearch installed. \> My requirement was that by keeping the cluster name similar, can I connect between the elasticsearch nodes?
> and if it is possible which ports should be opened for the communication between the nodes?
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### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [March 14, 2017, 8:30pm UTC](https://discuss.elastic.co/t/elasticsearch-nodes/78346/5 "2017-03-14T20:30:28Z")
If you mean to share the same cluster across 2 different datacenter, I'd recommend not doing that.
If you have one cluster per Datacenter and want to search in both from the same client, have a look at federated search: [https://www.elastic.co/guide/en/elasticsearch/reference/5.x/modules-cross-cluster-search.html](https://www.elastic.co/guide/en/elasticsearch/reference/5.x/modules-cross-cluster-search.html)
This is coming in 5.3
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### Author:  [@ArjunSISA](https://discuss.elastic.co/u/ArjunSISA)
#### Post date: [March 22, 2017, 1:23pm UTC](https://discuss.elastic.co/t/elasticsearch-nodes/78346/6 "2017-03-22T13:23:16Z")
Hi David,
I was not talking about sharing two clusters but sharing two nodes.
i wanted to use a single cluster under which there would be two different nodes at two different locations which then would communicate with each other.
Is it possible?
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### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [March 22, 2017, 2:16pm UTC](https://discuss.elastic.co/t/elasticsearch-nodes/78346/7 "2017-03-22T14:16:53Z")
It is technically doable. It is absolutely not recommended because of Latency issues.
We are working on Cross Data Center clusters but it's not ready.
For now, you need to create 2 clusters, one in each region, then push your documents to both clusters.
You can use something like Federated Search to search in both clusters though.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [April 19, 2017, 2:16pm UTC](https://discuss.elastic.co/t/elasticsearch-nodes/78346/8 "2017-04-19T14:16:54Z")
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