Cloud connection is unavailable

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1

I have a C8 hub running platform version 2.3.8.118 which show "Cloud connection is unavailable".
I have tried all the suggestions from the FAQ and in previous community posts for this issue, but nothing seems to apply to my situation because I have not changed anything on the network or router. It just happened following a reboot earlier today. It now won't connect to the cloud.
The local connection to the hub works OK and all my automations are running correctly with Z-Wave or WiFi via the router.
I have Remote Admin, but this cannot connect from the Android app.
The hub has a cable connection to the router, which works fine for local connection from the app via WiFi.
I have static IP, reserved in the router. I don't have Alexa or any other hub.
Other symptoms reported in Hubitat logs:

  • SharpTools io reports “connection refused” errors
  • Attempts to send a Pushover alert give status: 408 Request Timeout.
  • My routine ping to Healthchecks io also fails with status: 408 Request Timeout. Healthchecks io alerted me to the problem.
    I saw one post that suggested trying to reauthenticate my hub to my account, but I am not sure I can do that while I have an active Remote Admin subscription.
    Do you have any suggestions please?
2

Your hub has lost access to DNS servers. This is easily fixed from the hub’s Network Setup page.

Use the recommended list of DNS servers from the Hubitat Documentation for Network Settings:

An example is also provided in this post by @jtp10181

3

Thanks for the quick response; that seems to have fixed it. I had DNS set to 8.8.8.8, 1.1.1.1 on the hub, but adding the other three from the docs, 8.8.4.4, 1.0.0.1, 9.9.9.9, has resolved the problem

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