When deploying a cluster to a single zone/network, there are some firewall rules automatically created by GKE. Trying to get clarification for all of these currently, but failing with one of these rules.

  • Rule 1: For this I need clarification
  • Rule 2: Range containing exactly one IP which is the Master
  • Rule 3: Enable networking between different regions/zones for the network 'default'

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This is the rule that allows traffic between pods through the nodes in the cluster. is the container address range configured in your cluster. You can verify it by looking at the properties of your GKE cluster.

I hope this helps.

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