agentstack/policy.yaml at main · i-am-bee/agentstack · GitHub

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apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: restricted-access-policy
  namespace: default
spec:
  podSelector:
    matchLabels:
      app: test-client

  policyTypes:
    - Egress

  egress:
    # Rule 1: Allow DNS in kube-system namespace
    - to:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: kube-system
          podSelector:
            matchLabels:
              k8s-app: kube-dns
      ports:
        - protocol: UDP
          port: 53
        - protocol: TCP
          port: 53

    # Rule 2: Allow ONLY agentstack-server in specific namespace
    - to:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: default
          podSelector:
            matchLabels:
              app: agentstack-server
      ports:
        - protocol: TCP
          port: 8333

    # Rule 3: Allow external internet ONLY
    - to:
        - ipBlock:
            cidr: 0.0.0.0/0
            except:
              - 10.0.0.0/8
              - 172.16.0.0/12
              - 192.168.0.0/16
              - 169.254.0.0/16
              - 127.0.0.0/8
              - 224.0.0.0/4
              - 240.0.0.0/4
              - 100.64.0.0/10
              - 198.18.0.0/15