Virtual network with DDoS protection plan disabled

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Metadata

Id: b4cc2c52-34a6-4b43-b57c-4bdeb4514a5a

Cloud Provider: Azure

Platform: Terraform

Severity: Low

Category: Availability

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Description

Azure Virtual Networks should have a DDoS Protection Plan enabled to safeguard against distributed denial-of-service (DDoS) attacks that can overwhelm and disrupt services hosted in the cloud. Without the ddos_protection_plan block configured with enable = true in the azurerm_virtual_network resource, as shown below, the network remains vulnerable to these attacks, potentially resulting in service downtime and extensive business impact.

ddos_protection_plan {
  id     = azurerm_network_ddos_protection_plan.example.id
  enable = true
}

Enabling DDoS protection ensures automatic detection and mitigation of DDoS attacks, helping protect application availability and data integrity in the Azure environment.

Compliant Code Examples

resource "azurerm_resource_group" "example" {
  name     = "example-resources"
  location = "West Europe"
}

resource "azurerm_network_security_group" "example" {
  name                = "acceptanceTestSecurityGroup1"
  location            = azurerm_resource_group.example.location
  resource_group_name = azurerm_resource_group.example.name
}

resource "azurerm_network_ddos_protection_plan" "example" {
  name                = "ddospplan1"
  location            = azurerm_resource_group.example.location
  resource_group_name = azurerm_resource_group.example.name
}

resource "azurerm_virtual_network" "negative1" {
  name                = "virtualNetwork1"
  location            = azurerm_resource_group.example.location
  resource_group_name = azurerm_resource_group.example.name
  address_space       = ["10.0.0.0/16"]
  dns_servers         = ["10.0.0.4", "10.0.0.5"]

  ddos_protection_plan {
    id     = azurerm_network_ddos_protection_plan.example.id
    enable = true
  }

  subnet {
    name           = "subnet1"
    address_prefix = "10.0.1.0/24"
  }

  subnet {
    name           = "subnet2"
    address_prefix = "10.0.2.0/24"
  }

  subnet {
    name           = "subnet3"
    address_prefix = "10.0.3.0/24"
    security_group = azurerm_network_security_group.example.id
  }

  tags = {
    environment = "Production"
  }
}

Non-Compliant Code Examples

resource "azurerm_resource_group" "example" {
  name     = "example-resources"
  location = "West Europe"
}

resource "azurerm_network_security_group" "example" {
  name                = "acceptanceTestSecurityGroup1"
  location            = azurerm_resource_group.example.location
  resource_group_name = azurerm_resource_group.example.name
}

resource "azurerm_network_ddos_protection_plan" "example" {
  name                = "ddospplan1"
  location            = azurerm_resource_group.example.location
  resource_group_name = azurerm_resource_group.example.name
}

resource "azurerm_virtual_network" "positive1" {
  name                = "virtualNetwork1"
  location            = azurerm_resource_group.example.location
  resource_group_name = azurerm_resource_group.example.name
  address_space       = ["10.0.0.0/16"]
  dns_servers         = ["10.0.0.4", "10.0.0.5"]

  ddos_protection_plan {
    id     = azurerm_network_ddos_protection_plan.example.id
    enable = false
  }

  subnet {
    name           = "subnet1"
    address_prefix = "10.0.1.0/24"
  }

  subnet {
    name           = "subnet2"
    address_prefix = "10.0.2.0/24"
  }

  subnet {
    name           = "subnet3"
    address_prefix = "10.0.3.0/24"
    security_group = azurerm_network_security_group.example.id
  }

  tags = {
    environment = "Production"
  }
}

resource "azurerm_resource_group" "example" {
  name     = "example-resources"
  location = "West Europe"
}

resource "azurerm_network_security_group" "example" {
  name                = "acceptanceTestSecurityGroup1"
  location            = azurerm_resource_group.example.location
  resource_group_name = azurerm_resource_group.example.name
}

resource "azurerm_network_ddos_protection_plan" "example" {
  name                = "ddospplan1"
  location            = azurerm_resource_group.example.location
  resource_group_name = azurerm_resource_group.example.name
}

resource "azurerm_virtual_network" "positive1" {
  name                = "virtualNetwork1"
  location            = azurerm_resource_group.example.location
  resource_group_name = azurerm_resource_group.example.name
  address_space       = ["10.0.0.0/16"]
  dns_servers         = ["10.0.0.4", "10.0.0.5"]

  subnet {
    name           = "subnet1"
    address_prefix = "10.0.1.0/24"
  }

  subnet {
    name           = "subnet2"
    address_prefix = "10.0.2.0/24"
  }

  subnet {
    name           = "subnet3"
    address_prefix = "10.0.3.0/24"
    security_group = azurerm_network_security_group.example.id
  }

  tags = {
    environment = "Production"
  }
}