Service Bus should restrict public network access

High Azure General servicebus-no-public-access

Applies to

Microsoft.ServiceBus/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: Service Bus > Networking > set Public network access to Disabled. See: https://learn.microsoft.com/en-us/azure/service-bus-messaging/service-bus-ip-filtering

Careful: Disabling public access blocks all senders/receivers not using private endpoints

CLI

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

Terraform

resource "azurerm_servicebus_namespace" "{name}" {
  name                         = "{name}"
  resource_group_name          = "{rg}"
  location                     = var.location
  sku                          = "Premium"
  public_network_access_enabled = false
}

Compliance frameworks

Cloud Security BaselineNS-2

Vendor documentation

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