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Add reverse DNS record for public ip in Azure

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When hosting a website or any other service on Azure, it is important to have a Reverse DNS (rDNS) record for your public IP address. This is because rDNS allows you to assign a hostname to an IP address, which can be used to verify the authenticity of your service, and improve email deliverability. In this blog post, we will discuss how to add a rDNS record for your public IP in Azure.

Configuring a rDNS Record in Azure

1. install az tool

Install the Azure CLI: https://docs.microsoft.com/en-us/cli/azure/install-azure-cli

2. login

az login

3. run command

az network public-ip update --resource-group $(resource group of public ip) \
           --name $(resource name of public ip) --reverse-fqdn $(www.rDNS.com.)

Verifying the rDNS Record

After adding the rDNS record for your public IP in Azure, you can verify it using a simple command-line tool called nslookup. To do this, follow these steps:

  1. Open a command prompt or terminal window.
  2. Type “nslookup” followed by the public IP address you want to verify.
  3. If the rDNS record has been successfully added, you should see the hostname that you assigned to the IP address.
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