Overview of Microsoft Defender for DNS


As of August 1 2023, customers with an existing subscription to Defender for DNS can continue to use the service, but new subscribers will receive alerts about suspicious DNS activity as part of Defender for Servers P2.

Microsoft Defender for DNS provides another layer of protection for resources that use Azure DNS's Azure-provided name resolution capability.

From within Azure DNS, Defender for DNS monitors the queries from these resources and detects suspicious activities without the need for any extra agents on your resources.


Aspect Details
Release state: General availability (GA)
Pricing: Microsoft Defender for DNS is billed as shown on the pricing page
Clouds: Commercial clouds
Microsoft Azure operated by 21Vianet
Azure Government

What are the benefits of Microsoft Defender for DNS?

Microsoft Defender for DNS detects suspicious and anomalous activities such as:

  • Data exfiltration from your Azure resources using DNS tunneling
  • Malware communicating with command and control servers
  • DNS attacks - communication with malicious DNS resolvers
  • Communication with domains used for malicious activities such as phishing and crypto mining

A full list of the alerts provided by Microsoft Defender for DNS is on the alerts reference page.


Microsoft Defender for DNS doesn't use any agents.

Next steps

In this article, you learned about Microsoft Defender for DNS.

For related material, see the following article:

Security alerts might be generated by Defender for Cloud or received from other security products. To export all of these alerts to Microsoft Sentinel, any third-party SIEM, or any other external tool, follow the instructions in Exporting alerts to a SIEM.