# Nothing in the cluster may connect to the proxy; tailnet traffic arrives over its own outbound
# connections. Outbound, it reaches only what it needs.
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: tailscale
  namespace: tailscale
spec:
  podSelector: {}
  policyTypes:
    - Ingress
    - Egress
  egress:
    - to:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: kube-system
          podSelector:
            matchLabels:
              k8s-app: kube-dns
      ports:
        - protocol: UDP
          port: 53
        - protocol: TCP
          port: 53
    - to:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: kube-system
          podSelector:
            matchLabels:
              app.kubernetes.io/name: traefik
      ports:
        - protocol: TCP
          port: 8000
        - protocol: TCP
          port: 8443
    # The Kubernetes API, where the proxy saves its identity.
    - ports:
        - protocol: TCP
          port: 6443
    # Tailscale's coordination and relay servers, and WireGuard to peers on the internet.
    - to:
        - ipBlock:
            cidr: 0.0.0.0/0
            except:
              - 10.0.0.0/8
              - 172.16.0.0/12
              - 192.168.0.0/16
              - 100.64.0.0/10
              - 169.254.0.0/16
    # Direct WireGuard paths to my devices when they're on the home network.
    - to:
        - ipBlock:
            cidr: 192.168.0.0/16
      ports:
        - protocol: UDP