Azure DDoS Protection Terraform Guide

What is this Azure DDoS Protection Terraform page?

This is the Infrastructure as Code guide for deploying Azure DDoS Network Protection with Terraform. It focuses on the pattern Azure documents most clearly for organizational use: create a DDoS protection plan and associate it with one or more virtual networks. Azure describes Network Protection as enhanced DDoS mitigation that is enabled on VNets and automatically tuned for protected resources in those virtual networks. :contentReference[oaicite:3]{index=3}

Why use Terraform for Azure DDoS Protection?

DDoS settings often look like a one-time toggle in a cloud portal, but production teams usually need more than that. Terraform helps treat DDoS posture as part of the actual network design rather than as a forgotten manual step added later.

Azure DDoS Terraform explained with the 5 Ws

Core Azure DDoS Terraform components

How Azure DDoS Terraform works in practice

The Terraform side is straightforward: define the plan, define the network, and make the network part of that protection model. What makes the page useful is explaining how that maps to actual Azure operations.

1. Create a resource group to hold the networking resources.
2. Create an Azure DDoS protection plan.
3. Create the target virtual network.
4. Associate the virtual network with the DDoS protection plan.
5. Deploy public-facing services into that protected network, such as load balancers, gateways, or other internet-facing components.
6. Let Azure handle monitoring and automatic mitigation when DDoS thresholds are crossed. :contentReference[oaicite:9]{index=9}

Simple Azure DDoS Protection Terraform architecture diagram

This diagram matches the Terraform pattern on this page and shows the relationship between the protection plan, the virtual network, and the public edge.

                    Internet Traffic
         +----------------------------------+
         | Legitimate users and bad traffic |
         +----------------+-----------------+
                          |
                          |
         +----------------v----------------+
         | Public Azure Edge Exposure      |
         | App Gateway / LB / Firewall /   |
         | Public IP-backed services       |
         +----------------+----------------+
                          |
                 +--------v---------+
                 | Protected VNet   |
                 | linked to DDoS   |
                 | Network Plan     |
                 +--------+---------+
                          |
                +---------v----------+
                | DDoS Protection    |
                | Plan               |
                +---------+----------+
                          |
                +---------v----------+
                | Terraform-managed  |
                | Azure networking   |
                +--------------------+

Azure DDoS Protection Terraform example

This example creates a resource group, a DDoS protection plan, a virtual network associated with that plan, and an optional public IP to represent a public edge resource living in that environment.

terraform {
  required_version = ">= 1.5.0"

  required_providers {
    azurerm = {
      source  = "hashicorp/azurerm"
      version = ">= 3.100.0"
    }
  }
}

provider "azurerm" {
  features {}
}

locals {
  location            = "South Africa North"
  resource_group_name = "rg-cn-ddos-san-1"

  ddos_plan_name      = "ddos-cn-plan-san-1"
  vnet_name           = "vnet-cn-protected-san-1"
  vnet_address_space  = ["10.40.0.0/16"]

  public_ip_name      = "pip-cn-edge-san-1"

  tags = {
    environment = "lab"
    workload    = "public-edge"
    owner       = "cloudnetworking-io"
    managed_by  = "terraform"
  }
}

resource "azurerm_resource_group" "this" {
  name     = local.resource_group_name
  location = local.location
  tags     = local.tags
}

resource "azurerm_network_ddos_protection_plan" "this" {
  name                = local.ddos_plan_name
  location            = azurerm_resource_group.this.location
  resource_group_name = azurerm_resource_group.this.name

  tags = local.tags
}

resource "azurerm_virtual_network" "this" {
  name                = local.vnet_name
  location            = azurerm_resource_group.this.location
  resource_group_name = azurerm_resource_group.this.name
  address_space       = local.vnet_address_space

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

  tags = local.tags
}

resource "azurerm_public_ip" "edge" {
  name                = local.public_ip_name
  location            = azurerm_resource_group.this.location
  resource_group_name = azurerm_resource_group.this.name
  allocation_method   = "Static"
  sku                 = "Standard"

  tags = local.tags
}

output "resource_group_name" {
  value = azurerm_resource_group.this.name
}

output "ddos_plan_name" {
  value = azurerm_network_ddos_protection_plan.this.name
}

output "virtual_network_name" {
  value = azurerm_virtual_network.this.name
}

output "public_ip_name" {
  value = azurerm_public_ip.edge.name
}

output "ddos_plan_id" {
  value = azurerm_network_ddos_protection_plan.this.id
}

location            = "South Africa North"
resource_group_name = "rg-cn-ddos-san-1"
ddos_plan_name      = "ddos-cn-plan-san-1"
vnet_name           = "vnet-cn-protected-san-1"
vnet_address_space  = ["10.40.0.0/16"]
public_ip_name      = "pip-cn-edge-san-1"

terraform init
terraform fmt
terraform validate
terraform plan -out tfplan
terraform apply tfplan

What the Terraform code is doing

Why the public IP still matters in a DDoS Terraform page

Even though the main Terraform object is the DDoS protection plan and VNet association, most people care about DDoS Protection because of what is publicly exposed.

Real-world Azure DDoS Terraform use cases

These are the situations where teams usually stop treating DDoS Protection as a portal toggle and start managing it properly as code.

DDoS Network Protection Terraform vs DDoS IP Protection thinking

The Terraform mindset changes depending on whether you think in terms of protected networks or just protected IP exposure.

Azure DDoS Terraform best practices

• Protect the right VNets. Start with a clear map of public-facing services and which virtual networks actually host that exposure.
• Tag the DDoS plan clearly. Ownership, environment, public-edge purpose, and cost visibility matter more later than people expect.
• Keep the code modular. Resource group, plan, VNet, and public-edge resources are good candidates for reusable modules.
• Document lifecycle implications. Azure notes that a VNet cannot be moved while DDoS protection is enabled on it. :contentReference[oaicite:19]{index=19}
• Do not treat DDoS as your only defense. Pair it with WAF, monitoring, scaling, and resilient application design. :contentReference[oaicite:20]{index=20}
• Keep public IP context visible in documentation. The VNet plan association is the code pattern, but public exposure is the real reason the pattern exists.
• Validate Azure policy requirements. Some organizations enforce DDoS protection through Azure Policy, so the Terraform flow should align with that governance model. :contentReference[oaicite:21]{index=21}

Common mistakes engineers make with Azure DDoS Terraform

Frequently asked questions about Azure DDoS Terraform

Related Azure networking and security pages

These links keep the Terraform page connected to the wider Azure networking section and help users move naturally between concept and implementation.