apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: k8s-mgmt-pod
spec:
  podSelector:
    matchLabels:
      app.kubernetes.io/name: k8s-mgmt-pod
  policyTypes:
    - Ingress
  ingress:
    # Starting point only. Adjust these selectors to the namespaces or pods that should reach the bastion.
    - from:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: k8s-mgmt-pod
        - namespaceSelector:
            matchLabels:
              k8s-mgmt-pod-access: "true"
      ports:
        - protocol: TCP
          port: 22
        - protocol: TCP
          port: 3000