last sync: 2020-Oct-20 13:29:33 UTC

Azure Policy

Kubernetes cluster pods should only use approved host network and port range

Name Kubernetes cluster pods should only use approved host network and port range
Id 82985f06-dc18-4a48-bc1c-b9f4f0098cfe
Version 1.0.1
details on versioning
Category Kubernetes
Description This policy controls pod access to the host network and the allowable host port range in a Kubernetes cluster. This policy is generally available for Kubernetes Service (AKS), and preview for AKS Engine and Azure Arc enabled Kubernetes. For instructions on using this policy, visit https://aka.ms/kubepolicydoc.
Mode Microsoft.Kubernetes.Data
Type BuiltIn
Preview FALSE
Deprecated FALSE
Effect Default: audit
Allowed: (audit,deny,disabled)
Used RBAC Role none
History
Date/Time (UTC ymd) (i) Change type Change detail
2020-09-15 14:06:41 change Previous DisplayName: [Preview]: Kubernetes cluster pods should only use approved host network and port range
2020-07-08 14:28:08 add 82985f06-dc18-4a48-bc1c-b9f4f0098cfe
Used in Initiatives
Initiative DisplayName Initiative Id
Enable Monitoring in Azure Security Center 1f3afdf9-d0c9-4c3d-847f-89da613e70a8
Kubernetes cluster pod security baseline standards for Linux-based workloads a8640138-9b0a-4a28-b8cb-1666c838647d
Kubernetes cluster pod security restricted standards for Linux-based workloads 42b8ef37-b724-4e24-bbc8-7a7708edfe00
Json
{
  "properties": {
    "displayName": "Kubernetes cluster pods should only use approved host network and port range",
    "policyType": "BuiltIn",
    "mode": "Microsoft.Kubernetes.Data",
    "description": "This policy controls pod access to the host network and the allowable host port range in a Kubernetes cluster. This policy is generally available for Kubernetes Service (AKS), and preview for AKS Engine and Azure Arc enabled Kubernetes. For instructions on using this policy, visit https://aka.ms/kubepolicydoc.",
    "metadata": {
      "version": "1.0.1",
      "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"
        ]
      },
      "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
      }
    },
    "policyRule": {
      "if": {
        "field": "type",
        "in": [
          "AKS Engine",
          "Microsoft.Kubernetes/connectedClusters",
          "Microsoft.ContainerService/managedClusters"
        ]
      },
      "then": {
      "effect": "[parameters('effect')]",
        "details": {
          "constraintTemplate": "https://raw.githubusercontent.com/Azure/azure-policy/master/built-in-references/Kubernetes/host-network-ports/template.yaml",
          "constraint": "https://raw.githubusercontent.com/Azure/azure-policy/master/built-in-references/Kubernetes/host-network-ports/constraint.yaml",
          "values": {
          "allowHostNetwork": "[parameters('allowHostNetwork')]",
          "minPort": "[parameters('minPort')]",
          "maxPort": "[parameters('maxPort')]",
          "excludedNamespaces": "[parameters('excludedNamespaces')]"
          }
        }
      }
    }
  },
  "id": "/providers/Microsoft.Authorization/policyDefinitions/82985f06-dc18-4a48-bc1c-b9f4f0098cfe",
  "type": "Microsoft.Authorization/policyDefinitions",
  "name": "82985f06-dc18-4a48-bc1c-b9f4f0098cfe"
}