# Connection problem to the broker

**URL:** <https://discourse.nodered.org/t/connection-problem-to-the-broker/45325>\
**Category:** General\
**Created:** [7 May 2021 09:30 UTC](https://discourse.nodered.org/t/connection-problem-to-the-broker/45325 "2021-05-07T09:30:19Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Yaleaura](https://avatars.discourse-cdn.com/v4/letter/y/85e7bf/32.png) [@Yaleaura](https://discourse.nodered.org/u/Yaleaura)\
**Post date:** [7 May 2021 09:30 UTC](https://discourse.nodered.org/t/connection-problem-to-the-broker/45325/1 "2021-05-07T09:30:19Z")

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We have a lorawan system (NW + APPS) deployed with Docker on an EC2 (AWS). We installed node-red on this EC2 instance (in docker) and locally on a machine. We are unable to connect to the brocker from node-red installed on EC2 while the connection is effective when we are using node-red locally. I would like to know what are the possible causes of this problem and how I can solve them? How should I proceed with the security keys (certificates, etc.)?

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [6 July 2021 09:30 UTC](https://discourse.nodered.org/t/connection-problem-to-the-broker/45325/2 "2021-07-06T09:30:42Z")

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