Kubernetes control plane URL access

The kubectl cluster-info returns URL where the Kubernetes control plane is running at. None of my droplets / load balancers have the public IP address returned by nslookup of that URL.

My questions are:

  • What is exactly running at the URL (some special service managed by DO that forwards the requests to the cluster) ?
  • Is it possible to apply firewall rules so kubectl can be executed only from a specific IP address (VPN) ? I saw worker-node-firewalls but I think the public firewall only accepts / drops packets to the nodes.

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The control plane configuration is fully managed by DigitalOcean. You cannot modify the control plane files, feature gates, or admission controllers.

For more information on the managed elements of DigitalOcean Kubernetes check out the documentation here:

Hope that this helps!