I can't see my gateway on Ignition Perspective

Hello everybody, I am working with ignition perspective and when I want to see the application in my smartphone I cannot found a gateway on my red. Is there a configuration on on the gateway to set it visible in the app of ignition perspective?

If you can’t find your Gateway it is most likely a firewall configuration issue. Are you manually inputting your Gateway, or are you just allowing for an automatic search? Have you verified the IP of the Gateway, along with the port and whether you should be using http or https?

What is “red”?