# Open specified port to join cluster
**URL:** https://discuss.elastic.co/t/open-specified-port-to-join-cluster/119009
**Category:** Elasticsearch
**Created:** [February 8, 2018, 9:37am UTC](https://discuss.elastic.co/t/open-specified-port-to-join-cluster/119009 "2018-02-08T09:37:11Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@f26227279](https://discuss.elastic.co/u/f26227279)
#### Post date: [February 8, 2018, 9:37am UTC](https://discuss.elastic.co/t/open-specified-port-to-join-cluster/119009/1 "2018-02-08T09:37:12Z")
Hi everyone, my OS is centos7. Every time I have to close the firewall then I could join the node to the cluster, otherwise it would show the error:
```
[ES2] failed to send join request to master [{JWCDX3D}{JWCDX3DATsCmXjkrOjASNg}{bp2B0nx5Qy-TT8Hxj5F2kQ}{192.168.0.139}{192.168.0.139:9300}{rack=ES3}], reason [RemoteTransportException[[JWCDX3D][192.168.0.139:9300][internal:discovery/zen/join]]; nested: ConnectTransportException[[ES2][192.168.0.243:9300] connect_timeout[30s]]; nested: IOException[No route to host: 192.168.0.243/192.168.0.243:9300]; nested: IOException[No route to host]; ]
```
but, could I just open some port to make the node can join the cluster?
I have tried to open 9200 and 9300 port, but it still can't work.
thank you in advance !
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [March 8, 2018, 9:37am UTC](https://discuss.elastic.co/t/open-specified-port-to-join-cluster/119009/2 "2018-03-08T09:37:25Z")
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