Virtual Network should have encryption enabled

Medium Azure General vnet-encryption

Applies to

Microsoft.Network/virtualNetworks

What CGPulse checks

A resource passes this rule when encryption.enabled must equal true. Anything else is reported as a finding with the evaluated property value attached as evidence.

How to fix it

Enable VNet encryption to protect VM-to-VM traffic from interception. In Azure Portal: VNet > Properties > enable encryption. See: https://learn.microsoft.com/en-us/azure/virtual-network/virtual-network-encryption-overview

CLI

az network vnet show --ids "{id}" --query "encryption" -o json

Bicep

// VNet encryption requires all VMs to support Accelerated Networking

resource vnet 'Microsoft.Network/virtualNetworks@2023-11-01' existing = {{
  name: '{name}'
}}
// TODO: Update vnet properties.encryption.enabled = true
// enforcement: 'allowUnencrypted' (audit) or 'dropUnencrypted' (block)

Terraform

resource "azurerm_virtual_network" "{name}" {
  name                = "{name}"
  resource_group_name = "{rg}"
  location            = var.location
  address_space       = ["10.0.0.0/16"]
  encryption {
    enforcement = "AllowUnencrypted"
  }
}

Compliance frameworks

Cloud Security BaselineDP-3

Vendor documentation

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