Exercise 05: Create DNS zones and configure DNS settings

Scenario

Your organization requires workloads to use domain names instead of IP addresses for internal communications. The organization doesn’t want to add a custom DNS solution. You identify these requirements.

  • A private DNS zone is required for contoso.com.
  • The DNS will use a virtual network link to app-vnet.
  • A new DNS record is required for the backend subnet.

Skilling tasks

  • Create and configure a private DNS zone.
  • Create and configure DNS records.
  • Configure DNS settings on a virtual network.

Architecture diagram

Diagram of Azure DNS linked to a virtual network.

Exercise instructions

Note: This exercise requires the Lab 01 virtual networks and subnets to be installed. A template is provided if you need to deploy those resources.

Create a private DNS zone

Azure Private DNS provides a reliable, secure DNS service to manage and resolve domain names in a virtual network without the need to add a custom DNS solution. By using private DNS zones, you can use your own custom domain names rather than the Azure-provided names.

  1. On the Azure portal, search for and select Private dns zones.

  2. Select + Create and configure the DNS zone.

    Property Value
    Subscription Select your subscription
    Resource group RG1
    Name private.contoso.com
    Region East US

  3. Select Review + create and then select Create.

  4. Wait for the DNS zone to deploy, and then select Go to resource.

To resolve DNS records in a private DNS zone, resources must be linked to the private zone. A virtual network link associates the virtual network to the private zone.

  1. In the portal, continue working on the private.contoso.com DNS zone.

  2. In the DNS Management blade, select + Virtual network links.

  3. Select + Add” and configure the virtual network link.

    Property Value
    Link name app-vnet-link
    Virtual network app-vnet
    Enable auto registration Enabled

  4. Select Create and wait for the deployment to finish. If necessary, Refresh the page.

Create a DNS record set

DNS records provide information about the DNS zone.

  1. In the portal, continue working on the private.contoso.com DNS zone.

  2. In the DNS Management blade, select + Recordsets.

  3. Notice that two A records have automatically been created for each of the virtual machines.

  4. Select + Add and configure a record set. When finished select Add.

    Property Value
    Name backend
    Type A
    TTL 1
    IP address 10.1.1.5

Note: This record set implies there is a virtual machine in app-vnet with a private IP address of 10.1.1.5.

Learn more with online training

  • Introduction to Azure DNS. This module explains what Azure DNS does, how it works, and when you should choose to use Azure DNS as a solution to meet your organization’s needs.
  • Host your domain on Azure DNS. In this module, you learn how to create a DNS zone and DNS records.

Key takeaways

Congratulations on completing the exercise. Here are the main takeaways:

  • Azure DNS is a cloud service that allows you to host and manage domain name system (DNS) domains, also known as DNS zones.
  • Azure DNS public zones host domain name zone data for records that you intend to be resolved by any host on the internet.
  • Azure Private DNS zones allow you to configure a private DNS zone namespace for private Azure resources.
  • A DNS zone is a collection of DNS records. DNS records provide information about the domain.