# authentik faces the internet (the login for every member of the group),
# so its pods only reach each other, DNS and the internet: not the LAN
# (NAS, router) or other namespaces. Scouts Online, the apps' OIDC calls
# and the LDAP outpost's connection to the server all use public
# addresses. The worker and the CNPG instance manager also reach the API
# server (the node, port 16443). Ingress comes from Envoy, the CNPG
# operator, the node itself (kubelet probes; 10.1.7.64 is the node's
# Calico VXLAN address, projectcalico.org/IPv4VXLANTunnelAddr), and for
# the LDAP outpost from anywhere: Stalwart on node001 comes in through the
# router and the ldap-outpost-external NodePort.
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: default
spec:
  podSelector: {}
  policyTypes:
    - Ingress
    - Egress
  ingress:
    - from:
        - podSelector: {}
    - from:
        - ipBlock:
            cidr: 192.168.1.204/32
        - ipBlock:
            cidr: 10.1.7.64/32
  egress:
    - to:
        - podSelector: {}
    - 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:
        - ipBlock:
            cidr: 0.0.0.0/0
            except:
              - 10.0.0.0/8
              - 100.64.0.0/10
              - 169.254.0.0/16
              - 172.16.0.0/12
              - 192.168.0.0/16
---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: server-from-envoy
spec:
  podSelector:
    matchLabels:
      app.kubernetes.io/name: authentik
      app.kubernetes.io/component: server
  policyTypes:
    - Ingress
  ingress:
    - from:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: envoy-gateway-system
          podSelector:
            matchLabels:
              app.kubernetes.io/name: envoy
      ports:
        - port: 9000
---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: ldap-outpost
spec:
  podSelector:
    matchLabels:
      app.kubernetes.io/name: authentik-outpost-ldap
  policyTypes:
    - Ingress
  ingress:
    - ports:
        - port: 3389
        - port: 6636
---
# The outpost controller deploys and updates the LDAP outpost.
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: worker-to-api
spec:
  podSelector:
    matchLabels:
      app.kubernetes.io/name: authentik
      app.kubernetes.io/component: worker
  policyTypes:
    - Egress
  egress:
    - to:
        - ipBlock:
            cidr: 192.168.1.204/32
      ports:
        - port: 16443
---
# The CNPG operator checks each instance on its status port and connects to
# PostgreSQL; the instance manager inside each pod watches its Cluster
# through the API server. The barman cloud sidecar sends the WAL and the
# base backups to Garage on the NAS (postgresql-backup.yaml).
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: postgres-cnpg
spec:
  podSelector:
    matchExpressions:
      - key: cnpg.io/cluster
        operator: Exists
  policyTypes:
    - Ingress
    - Egress
  ingress:
    - from:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: cnpg-system
      ports:
        - port: 8000
        - port: 5432
  egress:
    - to:
        - ipBlock:
            cidr: 192.168.1.204/32
      ports:
        - port: 16443
    - to:
        - ipBlock:
            cidr: 192.168.1.99/32
      ports:
        - port: 3900
---
# cert-manager's HTTP-01 solver, which runs only while a certificate
# renews: Let's Encrypt and cert-manager's own self check reach it on 8089
# through Envoy. The policies above let Envoy reach the app's port only,
# which left the solver unreachable (found 2026-10-26, when ynab's renewal
# hung).
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: acme-http01-solver
spec:
  podSelector:
    matchLabels:
      acme.cert-manager.io/http01-solver: "true"
  policyTypes:
    - Ingress
  ingress:
    - from:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: envoy-gateway-system
          podSelector:
            matchLabels:
              app.kubernetes.io/name: envoy
      ports:
        - port: 8089