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QuickStart: Create and configure Azure DDoS Network Protection using the Azure portal

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Get started with Azure DDoS Network Protection by using the Azure portal.

A DDoS protection plan defines a set of virtual networks that have DDoS Network Protection enabled, across subscriptions. You can configure one DDoS protection plan for your organization and link virtual networks from multiple subscriptions under a single Microsoft Entra tenant to the same plan.

In this QuickStart, you create a DDoS protection plan and link it to a virtual network.

Diagram of DDoS Network Protection.

Prerequisites

Create a DDoS protection plan

  1. Select Create a resource in the upper left corner of the Azure portal.

  2. Search the term DDoS. When DDoS protection plan appears in the search results, select it.

  3. Select Create.

  4. Enter or select the following values.

    Setting Value
    Subscription Select your subscription.
    Resource group Select Create new and enter MyResourceGroup.
    Name Enter MyDdosProtectionPlan.
    Region Enter East US.

  5. Select Review + create then Create

Note

Although DDoS Protection Plan resources needs to be associated with a region, users can enable DDoS protection on Virtual Networks in different regions and across multiple subscriptions under a single Microsoft Entra tenant.

Enable DDoS protection for a virtual network

Enable for a new virtual network

  1. Select Create a resource in the upper left corner of the Azure portal.

  2. Select Networking, and then select Virtual network.

  3. Enter or select the following values then select Next.

    Setting Value
    Subscription Select your subscription.
    Resource group Select Use existing, and then select MyResourceGroup
    Name Enter MyVnet.
    Region Enter East US.

  4. In the Security pane, select Enable on the Azure DDoS Network Protection radio.

  5. Select MyDdosProtectionPlan from the DDoS protection plan pane. The plan you select can be in the same, or different subscription than the virtual network, but both subscriptions must be associated to the same Microsoft Entra tenant.

  6. Select Next. In the IP address pane, select Add IPv4 address space and enter the following values. Then select Add.

    Setting Value
    IPv4 address space Enter 10.1.0.0/16.
    Subnet name Under Subnet name, select the Add subnet link and enter mySubnet.
    Subnet address range Enter 10.1.0.0/24.

  7. Select Review + create then Create.

Note

You cannot move a virtual network to another resource group or subscription when DDoS Protection is enabled for the virtual network. If you need to move a virtual network with DDoS Protection enabled, disable DDoS Protection first, move the virtual network, and then enable DDoS Protection. After the move, the auto-tuned policy thresholds for all the protected public IP addresses in the virtual network are reset.

Enable for an existing virtual network

  1. Create a DDoS protection plan by completing the steps in Create a DDoS protection plan, if you don't have an existing DDoS protection plan.
  2. Enter the name of the virtual network in the Search resources, services, and docs box at the top of the Azure portal. When it appears in the search results, select it.
  3. Under Settings, select DDoS protection.
  4. Select Enable. Under DDoS protection plan, choose an existing plan or the one you created in step 1, then select Save. The plan can be in the same or a different subscription than the virtual network, but both must be associated with the same Microsoft Entra tenant.

Add Virtual Networks to an existing DDoS protection plan

You can also enable the DDoS protection plan for an existing virtual network from the DDoS Protection plan itself. This is useful if you have multiple virtual networks to protect with the same plan.

  1. Search for DDoS protection plans in the Search resources, services, and docs box at the top of the Azure portal. When it appears, select it.
  2. Select the desired DDoS protection plan from the list.
  3. Under Settings, select Protected resources.
  4. Select Add, choose the subscription, resource group, and virtual network, then select Add again.

Configure an Azure DDoS Protection Plan using Azure Firewall Manager

Azure Firewall Manager is a platform to manage and protect your network resources at scale. You can associate your virtual networks with a DDoS protection plan within Azure Firewall Manager. See Configure an Azure DDoS Protection Plan using Azure Firewall Manager.

Enable DDoS protection for all virtual networks

This built-in policy detects virtual networks within a defined scope that don't have DDoS Network Protection enabled. It can then optionally create a remediation task to enable protection for the virtual network. See Azure Policy built-in definitions for Azure DDoS Network Protection for full list of built-in policies.

View protected resources

First, check the details of your DDoS protection plan:

  1. Search for DDoS protection plans in the Search resources, services, and docs box at the top of the Azure portal. When it appears, select it.
  2. Select your DDoS protection plan from the list.
  3. Under Settings, select Protected resources.
  4. In the Protected resources page, you can view the resources that are protected by this DDoS protection plan.

Disable for a virtual network:

You can disable DDoS protection for a virtual network while keeping it enabled on other virtual networks. To disable DDoS protection for a virtual network, follow these steps.

  1. Search for Virtual Network in the Search resources, services, and docs box at the top of the Azure portal. When it appears, select it.
  2. Under Settings, select DDoS Protection.
  3. Select Disable for DDoS Network Protection.

Note

Disabling DDoS protection for a virtual network won't delete the protection plan. You'll still incur costs if you only disable DDoS protection without deleting the plan. To avoid unnecessary charges, you need to delete the DDoS protection plan resource. See Clean up resources.

Clean up resources

You can keep your resources for the next tutorial. If no longer needed, delete the MyResourceGroup used in this example. When you delete the resource group, you also delete the DDoS protection plan and all its related resources. If you don't intend to use this DDoS protection plan, you should remove resources to avoid unnecessary charges.

Warning

This action is irreversible.

  1. In the Azure portal, search for and select Resource groups, or select Resource groups from the Azure portal menu.

  2. Filter or scroll down to find the MyResourceGroup resource group.

  3. Select the resource group, then select Delete resource group.

  4. Type the resource group name to verify, and then select Delete.

Note

To delete a DDoS protection plan, first dissociate all virtual networks from it.

Next steps

To learn how to configure metrics alerts through Azure Monitor, continue to the tutorials.

Configure Azure DDoS Protection metric alerts through portal