# Cluster in two data centers
**URL:** https://discuss.elastic.co/t/cluster-in-two-data-centers/309302
**Category:** Elasticsearch
**Created:** [July 11, 2022, 9:03am UTC](https://discuss.elastic.co/t/cluster-in-two-data-centers/309302 "2022-07-11T09:03:28Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@pszemesy](https://discuss.elastic.co/u/pszemesy)
#### Post date: [July 11, 2022, 9:03am UTC](https://discuss.elastic.co/t/cluster-in-two-data-centers/309302/1 "2022-07-11T09:03:28Z")
Hi All,
I do have an Elasticsearch cluster where some of the nodes are in an east-US datacenter (the master nodes are located here) and some of them are in a west-US datacenter.
I have requested the connections 9200 and 9300 TCP ports everrything is visible (checked with telnet), but there are some issues:
- The East US side of the cluster is up and running
- The West US nodes cannot see the East US nodes
- The West US nodes cannot connect to the cluster
What firewall settings did I missed?
Thanks,
Peter
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### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [July 11, 2022, 9:25am UTC](https://discuss.elastic.co/t/cluster-in-two-data-centers/309302/2 "2022-07-11T09:25:42Z")
Elasticsearch requires low latency and good throughput between all nodes in a cluster, so it is not recommended to deploy across regions, especially not so far apart.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [August 8, 2022, 9:26am UTC](https://discuss.elastic.co/t/cluster-in-two-data-centers/309302/3 "2022-08-08T09:26:19Z")
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