How can I connect my arduino with the cloud instance?

Yes, of course, thank you very much. I'm doing a practice where a led is turned on by means of an http that is uploaded on a remote desktop. but at the time of programming the arduino board sends me a message where it does not connect to the server. Based on an example I found on the internet

I have performed the entire procedure as it is, but it is not connected to the server. I was battling a lot, they could orient me, please look, this is the example https://www.fiware.org/2015/06/10/iot-tutorial-orion-context-broker-arduino/

I do not know where is the server deployed, nevertheless if you are using the FIWARE Lab to deploy a server on it and you want to communicate with it take care about the Security Group and open the corresponding port on it. By default all the ports are closed.