| JSON |
{
"displayName": "Kubernetes cluster pods should only use approved host network and port range",
"policyType": "BuiltIn",
"mode": "Microsoft.Kubernetes.Data",
"description": "Restrict pod access to the host network and the allowable host port range in a Kubernetes cluster. This recommendation is part of CIS 5.2.4 which is intended to improve the security of your Kubernetes environments. This policy is generally available for Kubernetes Service (AKS), and preview for AKS Engine and Azure Arc enabled Kubernetes. For more information, see https://aka.ms/kubepolicydoc.",
"metadata": {
"version": "4.0.1",
"category": "Kubernetes"
},
"parameters": {
"effect": {
"type": "String",
"metadata": {
"displayName": "Effect",
"description": "'audit' allows a non-compliant resource to be created or updated, but flags it as non-compliant. 'deny' blocks the non-compliant resource creation or update. 'disabled' turns off the policy."
},
"allowedValues": [
"audit",
"deny",
"disabled"
],
"defaultValue": "audit"
},
"excludedNamespaces": {
"type": "Array",
"metadata": {
"displayName": "Namespace exclusions",
"description": "List of Kubernetes namespaces to exclude from policy evaluation."
},
"defaultValue": [
"kube-system",
"gatekeeper-system",
"azure-arc"
]
},
"namespaces": {
"type": "Array",
"metadata": {
"displayName": "Namespace inclusions",
"description": "List of Kubernetes namespaces to only include in policy evaluation. An empty list means the policy is applied to all resources in all namespaces."
},
"defaultValue": []
},
"labelSelector": {
"type": "Object",
"metadata": {
"displayName": "Kubernetes label selector",
"description": "Label query to select Kubernetes resources for policy evaluation. An empty label selector matches all Kubernetes resources."
},
"defaultValue": {}
},
"allowHostNetwork": {
"type": "Boolean",
"metadata": {
"displayName": "Allow host network usage",
"description": "Set this value to true if pod is allowed to use host network otherwise false."
},
"defaultValue": false
},
"minPort": {
"type": "Integer",
"metadata": {
"displayName": "Min host port",
"description": "The minimum value in the allowable host port range that pods can use in the host network namespace."
},
"defaultValue": 0
},
"maxPort": {
"type": "Integer",
"metadata": {
"displayName": "Max host port",
"description": "The maximum value in the allowable host port range that pods can use in the host network namespace."
},
"defaultValue": 0
},
"excludedContainers": {
"type": "Array",
"metadata": {
"displayName": "Containers exclusions",
"description": "The list of InitContainers and Containers to exclude from policy evaluation. The identify is the name of container. Use an empty list to apply this policy to all containers in all namespaces."
},
"defaultValue": []
}
},
"policyRule": {
"if": {
"field": "type",
"in": [
"AKS Engine",
"Microsoft.Kubernetes/connectedClusters",
"Microsoft.ContainerService/managedClusters"
]
},
"then": {
"effect": "[parameters('effect')]",
"details": {
"constraintTemplate": "https://store.policy.core.windows.net/kubernetes/host-network-ports/v2/template.yaml",
"constraint": "https://store.policy.core.windows.net/kubernetes/host-network-ports/v2/constraint.yaml",
"excludedNamespaces": "[parameters('excludedNamespaces')]",
"namespaces": "[parameters('namespaces')]",
"labelSelector": "[parameters('labelSelector')]",
"values": {
"allowHostNetwork": "[parameters('allowHostNetwork')]",
"minPort": "[parameters('minPort')]",
"maxPort": "[parameters('maxPort')]",
"excludedContainers": "[parameters('excludedContainers')]"
}
}
}
}
}
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