SignalR Service should disable local authentication

Applies to

• Microsoft.SignalRService/signalR

What CGPulse checks

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

How to fix it

Disable local authentication and require Azure AD for scoped, auditable access. In Azure Portal: SignalR Service > Settings > disable local authentication. See: https://learn.microsoft.com/en-us/azure/azure-signalr/howto-disable-local-auth

Careful: Disabling access keys forces Azure AD authentication. Ensure all clients use managed identity or Azure AD tokens

CLI

az signalr update --ids "{id}" --disable-local-auth true

Terraform

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

Compliance frameworks

• Cloud Security BaselineIM-1

Related Azure rules

• Action Group should be enabled
• Activity Log Alert should be enabled
• AKS cluster logs should be sent to Log Analytics
• AKS cluster must enable RBAC
• AKS cluster must enable RBAC
• AKS cluster should be a private cluster
• AKS cluster should disable local accounts
• AKS cluster should enable Azure RBAC for Kubernetes