network policies

config/nginx.conf

@@ -36,15 +36,6 @@ http {
     listen 80;
     server_name ~^(?<subdomain>.+)\.dev\.mrcynic\.site$;
 
-    # Inform NGINX how to read the client IP from X-Forwarded-For
-    real_ip_header X-Forwarded-For;
-    set_real_ip_from 192.168.0.1;
-    real_ip_recursive on;
-
-    # Block if not LAN (192.168.0.0/24). You can expand or tighten this as needed.
-    allow 192.168.0.0/24;
-    deny all;
-
     location / {
       proxy_pass http://internal_ingress;
       proxy_set_header Host $host;

controllers/kustomization.yaml

@@ -0,0 +1,6 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - external-controller.yaml
+  - internal-controller.yaml

kustomization.yaml

@@ -4,11 +4,11 @@ kind: Kustomization
 namespace: ingress-nginx
 
 resources:
-  - external-controller.yaml
-  - internal-controller.yaml
   - namespace.yaml
   - services.yaml
   - proxy.yaml
+  - policies
+  - controllers
 
 configMapGenerator:
   - name: proxy-config

policies/external-policy.yaml

@@ -0,0 +1,13 @@
+---
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: allow-all-ingress-nginx-external
+spec:
+  podSelector:
+    matchLabels:
+      app.kubernetes.io/name: nginx-external
+  policyTypes:
+    - Ingress
+  ingress:
+    - {}

policies/internal-policy.yaml

@@ -0,0 +1,20 @@
+---
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: restrict-ingress-nginx-internal
+spec:
+  podSelector:
+    matchLabels:
+      app.kubernetes.io/name: nginx-internal
+  policyTypes:
+    - Ingress
+  ingress:
+    - from:
+        - ipBlock:
+            cidr: 192.168.0.0/16
+      ports:
+        - protocol: TCP
+          port: 80
+        - protocol: TCP
+          port: 443

policies/kustomization.yaml

@@ -0,0 +1,6 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - external-policy.yaml
+  - internal-policy.yaml