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Tutorial - Create an Azure DNS alias record to refer to an Azure public IP address.
This tutorial shows you how to configure an Azure DNS alias record to reference an Azure public IP address.
dns
vhorne
dns
tutorial
9/25/2018
victorh

Tutorial: Configure an alias record to refer to an Azure public IP address

In this tutorial, you learn how to:

[!div class="checklist"]

  • Create a network infrastructure.
  • Create a web server virtual machine.
  • Create an alias record.
  • Test the alias record.

If you don’t have an Azure subscription, create a free account before you begin.

Prerequisites

You must have a domain name available that you can host in Azure DNS to test with. You must have full control of this domain. Full control includes the ability to set the name server (NS) records for the domain.

For instructions to host your domain in Azure DNS, see Tutorial: Host your domain in Azure DNS.

The example domain used for this tutorial is contoso.com, but use your own domain name.

Create the network infrastructure

First, create a virtual network and a subnet to place your web servers in.

  1. Sign in to the Azure portal at http://portal.azure.com.
  2. In the upper left in the portal, select Create a resource. Enter resource group in the search box, and create a resource group named RG-DNS-Alias-pip.
  3. Select Create a resource > Networking > Virtual network.
  4. Create a virtual network named VNet-Server. Place it in the RG-DNS-Alias-pip resource group, and name the subnet SN-Web.

Create a web server virtual machine

  1. Select Create a resource > Windows Server 2016 VM.
  2. Enter Web-01 for the name, and place the VM in the RG-DNS-Alias-TM resource group. Enter a username and password, and select OK.
  3. For Size, select an SKU with 8-GB RAM.
  4. For Settings, select the VNet-Servers virtual network and the SN-Web subnet. For public inbound ports, select HTTP > HTTPS > RDP (3389), and then select OK.
  5. On the Summary page, select Create.

This procedure takes a few minutes to finish.

Install IIS

Install IIS on Web-01.

  1. Connect to Web-01, and sign in.
  2. On the Server Manager dashboard, select Add roles and features.
  3. Select Next three times. On the Server Roles page, select Web Server (IIS).
  4. Select Add Features, and then select Next.
  5. Select Next four times, and then select Install. This procedure takes a few minutes to finish.
  6. After the installation finishes, select Close.
  7. Open a web browser. Browse to localhost to verify that the default IIS web page appears.

Create an alias record

Create an alias record that points to the public IP address.

  1. Select your Azure DNS zone to open the zone.
  2. Select Record set.
  3. In the Name text box, select web01.
  4. Leave the Type as an A record.
  5. Select the Alias Record Set check box.
  6. Select Choose Azure service, and then select the Web-01-ip public IP address.

Test the alias record

  1. In the RG-DNS-Alias-pip resource group, select the Web-01 virtual machine. Note the public IP address.
  2. From a web browser, browse to the fully qualified domain name for the Web01-01 virtual machine. An example is web01.contoso.com. You now see the IIS default web page.
  3. Close the web browser.
  4. Stop the Web-01 virtual machine, and then restart it.
  5. After the virtual machine restarts, note the new public IP address for the virtual machine.
  6. Open a new browser. Browse again to the fully qualified domain name for the Web01-01 virtual machine. An example is web01.contoso.com.

This procedure succeeds because you used an alias record to point to the public IP address resource, not a standard A record.

Clean up resources

When you no longer need the resources created for this tutorial, delete the RG-DNS-Alias-pip resource group.

Next steps

In this tutorial, you created an alias record to refer to an Azure public IP address. To learn about Azure DNS and web apps, continue with the tutorial for web apps.

[!div class="nextstepaction"] Create DNS records for a web app in a custom domain