# Network ports explanation

**URL:** <https://forums.suse.com/t/network-ports-explanation/12315>\
**Category:** SUSE Rancher Prime\
**Created:** [November 11, 2018, 8:04am UTC](https://forums.suse.com/t/network-ports-explanation/12315 "2018-11-11T08:04:31Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![francesco2013](https://sea2.discourse-cdn.com/flex022/user_avatar/forums.suse.com/francesco2013/32/4611_2.png) [@francesco2013](https://forums.suse.com/u/francesco2013)\
**Post date:** [November 11, 2018, 8:04am UTC](https://forums.suse.com/t/network-ports-explanation/12315/1 "2018-11-11T08:04:31Z")

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Hi guys,

I was wondering the following things about the networking setup of Rancher with the nodes.

I have single-node Rancher 2.0 installation and 3 cluster nodes on AWS EC2 with the Cloud Provider specified.

This is the security group that Rancher creates and assigns to the nodes:

 ![image](https://us1.discourse-cdn.com/flex022/uploads/suse/original/2X/b/b36cd9abe3971d536454b5df6210375d8306fb93.png)

Are ports 6443 and 2376 needed to be opened to the world or I can restrict it ? For example adding only the public ip of the Rancher server or the nodes need to be able to communicate each other too ?  
I am not really confident opening ports to the world as you can imagine. Could you please be so kind to give me a tip with this guys ?

I have read the page [https://rancher.com/docs/rancher/v2.5/en/installation/requirements/](https://rancher.com/docs/rancher/v2.x/en/installation/references/) but still I dont find it clear ☹

Thank you very much in advance 🙂