Event Hub should restrict public network access

High Azure General eventhub-no-public-access

Applies to

Microsoft.EventHub/namespaces

What CGPulse checks

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

How to fix it

Disable public network access to prevent unauthorized internet exposure. In Azure Portal: Event Hub > Networking > set Public network access to Disabled. See: https://learn.microsoft.com/en-us/azure/event-hubs/event-hubs-ip-filtering

Careful: Disabling public access blocks all producers/consumers not using private endpoints

CLI

az eventhubs namespace update --ids "{id}" --public-network-access Disabled

Terraform

resource "azurerm_eventhub_namespace" "{name}" {
  name                          = "{name}"
  resource_group_name           = "{rg}"
  location                      = var.location
  sku                           = "Standard"
  public_network_access_enabled = false
}

Compliance frameworks

Cloud Security BaselineNS-2

Vendor documentation

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