Azure Firewall Premium should enable intrusion detection (IDPS)

High Azure General firewall-azure-firewall-premium-enable

IDPS monitors network activities for malicious activity and takes action to prevent it

Applies to

Microsoft.Network/azureFirewalls

What CGPulse checks

A resource passes this rule when intrusionDetection.mode must be one of ["Alert","Deny"]. Anything else is reported as a finding with the evaluated property value attached as evidence.

How to fix it

Enable IDPS in the Firewall Policy to detect and block network intrusion attempts. In Azure Portal: Firewall Policy > IDPS > enable Alert and deny mode. See: https://learn.microsoft.com/en-us/azure/firewall/premium-features#idps

CLI

az network firewall policy intrusion-detection add --policy-name "{name}" -g "{rg}" --mode Deny

Terraform

resource "azurerm_firewall_policy" "{name}" {
  name                = "{name}"
  resource_group_name = "{rg}"
  location            = var.location
  sku                 = "Premium"
  intrusion_detection {
    mode = "Deny"
  }
}

Compliance frameworks

Cloud Security BaselineNS-4

Vendor documentation

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