2026-11-07 10:31:17 +00:00
2 changed files with 41 additions and 0 deletions
@@ -0,0 +1,40 @@
+# CoreDNS is reachable from the LAN through the kube-dns-lb LoadBalancer
+# (ETP=Local, client address reaches the pod). Selecting the pods makes
+# them default-deny for ingress, so the whole cluster (pods, nodes, kubelet
+# probes, Prometheus) is allowed on every port; LAN clients only on 53.
+apiVersion: cilium.io/v2
+kind: CiliumNetworkPolicy
+metadata:
+  name: coredns-ingress
+  namespace: kube-system
+spec:
+  endpointSelector:
+    matchLabels:
+      k8s-app: kube-dns
+  ingress:
+    - fromEntities:
+        - cluster
+    - fromCIDRSet:
+        - cidrGroupRef: net-default
+        - cidrGroupRef: net-management
+        - cidrGroupRef: net-radius
+        - cidrGroupRef: net-video
+        - cidrGroupRef: net-iot
+        - cidrGroupRef: net-server
+        - cidrGroupRef: net-k8s-node
+        - cidrGroupRef: net-k8s-ingress
+        - cidrGroupRef: net-k8s-pod
+        - cidrGroupRef: net-privat
+        - cidrGroupRef: net-phone
+        - cidrGroupRef: net-access
+        - cidrGroupRef: net-vpn
+        - cidrGroupRef: net-guest
+        - cidrGroupRef: net-multi-transfer
+        - cidrGroupRef: net-multi-lan
+        - cidrGroupRef: net-mutti
+      toPorts:
+        - ports:
+            - port: "53"
+              protocol: UDP
+            - port: "53"
+              protocol: TCP
@@ -41,3 +41,4 @@ resources:
  - allow-cilium-health.yaml
  - cnpg-barman-s3.yaml
  - kube-system-hubble-relay.yaml
+  - kube-system-coredns.yaml