Here's a fact that surprises people new to Kubernetes and should genuinely alarm them a little: by default, every pod in your cluster can talk to every other pod, unrestricted, regardless of namespace, regardless of what the two pods actually do. Your carefully separated services, your isolated ...
Source: [Dev.to](https://dev.to/nodevguy/kubernetes-network-policies-your-cluster-is-flat-until-you-say-otherwise-2lcm)