From 1585c8a212dc15c7d8394413210f471d97d68195 Mon Sep 17 00:00:00 2001
From: devops <devops@local>
Date: Thu, 17 Sep 2026 02:40:27 +0000
Subject: [PATCH] networkpolicy: default-deny + sirf zaroori raasta

---
 manifests/demo-app/networkpolicy.yaml  | 36 ++++++++++++++++++++++++++
 manifests/hello-api/networkpolicy.yaml | 36 ++++++++++++++++++++++++++
 2 files changed, 72 insertions(+)
 create mode 100644 manifests/demo-app/networkpolicy.yaml
 create mode 100644 manifests/hello-api/networkpolicy.yaml

diff --git a/manifests/demo-app/networkpolicy.yaml b/manifests/demo-app/networkpolicy.yaml
new file mode 100644
index 0000000..6e01588
--- /dev/null
+++ b/manifests/demo-app/networkpolicy.yaml
@@ -0,0 +1,36 @@
+# Pehle sab band. Pod compromise ho to wo cluster me idhar-udhar na ja sake.
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: default-deny-all
+  namespace: demo-app
+spec:
+  podSelector: {}
+  policyTypes: [Ingress, Egress]
+---
+# Ab sirf jo chahiye wahi khola: app port par traffic andar, DNS bahar.
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: allow-app
+  namespace: demo-app
+spec:
+  podSelector:
+    matchLabels:
+      app: demo-app
+  policyTypes: [Ingress, Egress]
+  ingress:
+    - ports:
+        - protocol: TCP
+          port: 8000
+  egress:
+    # DNS ke bina kuch bhi kaam nahi karega
+    - to:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: kube-system
+      ports:
+        - protocol: UDP
+          port: 53
+        - protocol: TCP
+          port: 53
diff --git a/manifests/hello-api/networkpolicy.yaml b/manifests/hello-api/networkpolicy.yaml
new file mode 100644
index 0000000..71ee247
--- /dev/null
+++ b/manifests/hello-api/networkpolicy.yaml
@@ -0,0 +1,36 @@
+# Pehle sab band. Pod compromise ho to wo cluster me idhar-udhar na ja sake.
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: default-deny-all
+  namespace: hello-api
+spec:
+  podSelector: {}
+  policyTypes: [Ingress, Egress]
+---
+# Ab sirf jo chahiye wahi khola: app port par traffic andar, DNS bahar.
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: allow-app
+  namespace: hello-api
+spec:
+  podSelector:
+    matchLabels:
+      app: hello-api
+  policyTypes: [Ingress, Egress]
+  ingress:
+    - ports:
+        - protocol: TCP
+          port: 8000
+  egress:
+    # DNS ke bina kuch bhi kaam nahi karega
+    - to:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: kube-system
+      ports:
+        - protocol: UDP
+          port: 53
+        - protocol: TCP
+          port: 53