SignalR Service should disable public network access

High Azure General signalr-no-public-access

Applies to

Microsoft.SignalRService/signalR

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: SignalR Service > Networking > set Public network access to Disabled. See: https://learn.microsoft.com/en-us/azure/azure-signalr/howto-network-access-control

Careful: Disabling public access blocks ALL connections not using private endpoints

CLI

az signalr update --ids "{id}" --public-network false

Terraform

resource "azurerm_signalr_service" "{name}" {
  name                          = "{name}"
  resource_group_name           = "{rg}"
  location                      = var.location
  sku { name = "Standard_S1" capacity = 1 }
  public_network_access_enabled = false
}

Compliance frameworks

Cloud Security BaselineNS-2

Vendor documentation

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