```
kubectl annotate namespace default "net.beta.kubernetes.io/network-policy={\"ingress\":{\"isolation\":\"DefaultDeny\"}}"
```

When using `Cilium` as a CNI in your cluster, please edit the `flavor` field to `cilium`.

With NetworkPolicy enabled, traffic will be limited to just port 9000.

For more precise policy, set `networkPolicy.allowExternal=true`. This will