Firewall Policy should enable threat intelligence in Deny mode

High Azure General firewallpolicies-firewall-policy-enable-threat

Applies to

Microsoft.Network/firewallPolicies

What CGPulse checks

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

How to fix it

Enable Threat Intelligence filtering to block traffic to known malicious IPs and domains. In Azure Portal: Firewall > Threat intelligence > set mode to Alert and deny. See: https://learn.microsoft.com/en-us/azure/firewall/threat-intel

CLI

az network firewall policy update --ids "{id}" --threat-intel-mode Deny

Terraform

resource "azurerm_firewall_policy" "{name}" {
  name                     = "{name}"
  resource_group_name      = "{rg}"
  location                 = var.location
  threat_intelligence_mode = "Deny"
}

Compliance frameworks

Cloud Security: Azure Foundations

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