AKS cluster should have network policy configured

High Azure General aks-network-policy

Applies to

Microsoft.ContainerService/managedClusters

What CGPulse checks

A resource passes this rule when networkProfile.networkPolicy must be set. Anything else is reported as a finding with the evaluated property value attached as evidence.

How to fix it

Configure a network policy plugin to restrict pod-to-pod communication and reduce lateral movement risk. Set network policy (Azure or Calico) at cluster creation time. See: https://learn.microsoft.com/en-us/azure/aks/use-network-policies

CLI

az aks show --ids "{id}" --query "networkProfile.networkPolicy" -o tsv

Bicep

// Note: Network policy cannot be added to an existing cluster. Recreate with networkPolicy enabled

Terraform

resource "azurerm_kubernetes_cluster" "{name}" {
  name                = "{name}"
  resource_group_name = "{rg}"
  location            = var.location
  dns_prefix          = "{name}"
  network_profile {
    network_plugin = "azure"
    network_policy = "azure"
  }
  default_node_pool {
    name       = "default"
    node_count = 1
    vm_size    = "Standard_D2s_v5"
  }
  identity { type = "SystemAssigned" }
}

Compliance frameworks

Cloud Security BaselineNS-1

Vendor documentation

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