Guide to Azure DNS | Intellipaat

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What is Azure DNS
Updated on 05th Sep, 23 3.2 K Views

Through this article, we’ll understand, in detail, the amazing features of Azure DNS, how it works, and all the incredible ways that businesses can benefit from using this service. Let’s get right into it!

Here are the topics that we are going to discuss in this blog:

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What is Azure DNS?

Azure DNS is a cloud-based DNS service that delivers a highly available and scalable solution for managing Domain Name System (DNS) domains and records in the cloud. It empowers users to effortlessly manage their DNS zones and records through an easy-to-use interface or programmatically using Azure management APIs. Azure DNS utilizes Azure’s global network infrastructure to ensure that the DNS queries are resolved, quickly and reliably, from any location worldwide.

With Azure DNS, users can manage public and private DNS zones, thus offering complete control over their DNS configuration. Public DNS zones can be utilized to host DNS records for publicly accessible domains, such as websites and APIs, while private DNS zones can be used to manage DNS records for internal domain names and resources, such as virtual machines and Azure services.

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Why do we Need Azure DNS?

There are multiple reasons why businesses find Azure DNS essential, including the following:

Why do we Need Azure DNS
  • Scalability: Azure DNS is designed to handle high-volume DNS queries, making it a suitable solution for businesses of all sizes. It can automatically and quickly scale to accommodate changes in traffic, ensuring that applications and services remain available and responsive.
  • Reliability: Azure DNS is built on top of Azure’s global network infrastructure, ensuring that DNS queries are resolved quickly and reliably from anywhere in the world. This reliability is crucial for businesses that depend on their DNS infrastructure to deliver applications and services to their customers.
  • Control: Azure DNS provides complete control over DNS configuration, enabling businesses to manage their DNS zones and records using an intuitive interface or programmatically through Azure management APIs. This control allows businesses to tailor their DNS configuration to meet specific requirements.
  • Integration: Azure DNS can be integrated with other Azure services, such as Azure Traffic Manager, to deliver a comprehensive solution for managing application availability, scalability, and performance. This integration enables businesses to direct traffic to the most suitable endpoint based on the DNS query, ensuring that their application remains available and responsive.
  • Security: Azure DNS offers advanced features, such as DNSSEC and custom DNS servers, to enhance the security of DNS infrastructure against attacks and ensure the authenticity of DNS queries. This security is particularly critical for businesses that handle sensitive information or operate in regulated industries.

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Security and Supported Protocols of Azure DNS

  • Secure DNS Zones: Azure DNS supports secure DNS zones using Azure Private DNS, which enables resolution within virtual networks and private networks. Private DNS zones help ensure that DNS queries and responses stay within the boundaries of a virtual network or private network, improving security and reducing exposure to potential threats.
  • DNSSEC (Domain Name System Security Extensions): Azure DNS supports DNSSEC, which is a set of security extensions to DNS. DNSSEC provides authentication and data integrity for DNS responses, protecting against DNS spoofing and cache poisoning attacks. With Azure DNS, you can enable DNSSEC for your DNS zones to ensure secure and validated DNS resolution.
  • Role-Based Access Control (RBAC): Azure DNS integrates with Azure RBAC, allowing you to assign fine-grained access control to users and groups. RBAC enables you to control who can manage DNS zones, record sets, and other DNS-related resources within your Azure subscription. By defining appropriate roles and permissions, you can limit access to authorized individuals and improve security.
  • Azure Active Directory Integration: Azure DNS supports integration with Azure Active Directory (Azure AD) for authentication and authorization. You can manage access to Azure DNS resources using Azure AD, which provides centralized user management, multi-factor authentication, and other security features.
  • Transport Layer Security (TLS): Azure DNS supports secure communication over the network using the TLS protocol. When making DNS queries or updates to Azure DNS, you can leverage the encrypted communication provided by TLS to protect the confidentiality and integrity of DNS traffic.
  • Supported DNS Protocols: Azure DNS supports the standard DNS protocols, including DNS over UDP (User Datagram Protocol) and DNS over TCP (Transmission Control Protocol). These protocols are used for DNS resolution and communication between DNS clients and servers.

It’s worth noting that Azure DNS primarily focuses on providing DNS hosting and management services rather than being a full-fledged DNS resolver for public internet traffic. If you require DNS resolution for internet-facing services, you may need to configure DNS forwarding or integrate Azure DNS with other DNS resolver services or servers.

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How Does Azure DNS Work?

The working of Azure DNS involves creating DNS zones that represent the domain names that a business wants to manage. Then, DNS records are created within those zones to represent the mapping of domain names to IP addresses or other resources.

Once the DNS zones and records are created, users need to configure their domain registrar to use Azure DNS name servers to resolve the queries for their domains. Whenever a user tries to access a website or application, their device sends a DNS query to the Azure DNS name servers, which ask for the IP address associated with the domain name. The Azure DNS name servers respond to the query with the corresponding IP address, enabling the device to establish a connection to the website or application.

Azure DNS allows businesses to host public and private DNS zones, giving them complete control over their DNS configuration. Public DNS zones can be used to manage DNS records for publicly accessible domains such as websites and APIs, while private DNS zones can be used to manage DNS records for internal domain names and resources such as virtual machines and Azure services. 

Benefits of Azure DNS

Azure DNS provides several advantages for businesses, some of which are mentioned below:

  • Scalability: Azure DNS is appropriate for enterprises of all sizes since it can handle complex DNS queries. Applications and services are always accessible and responsive, thanks to their ability to scale up and down rapidly and dynamically in response to variations in traffic.
  • Reliability: The global network architecture of Azure serves as the foundation for Azure DNS, which guarantees that DNS requests are answered promptly and consistently from any location on the globe. For organizations that rely on their DNS infrastructure to provide clients with applications and services, this dependability is essential.
  • Integration: Businesses can use Azure DNS in conjunction with other Azure services, like Azure Traffic Manager, to manage the availability, scalability, and performance of their applications. Businesses can use this integration to route traffic to the best endpoint based on the DNS query, assuring the availability and responsiveness of their application.
  • Security: Advanced security capabilities like DNSSEC and custom DNS servers are made available by Azure DNS to help businesses defend their DNS infrastructure from threats and guarantee that the DNS queries are valid. Businesses that deal with sensitive information or work in regulated areas need to be extra careful about this security.

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Applications of Azure DNS

Azure DNS offers a range of applications that can benefit businesses of all sizes. Here are some common applications of Azure DNS that you should know about:

Applications of Azure DNS
  • Public-Facing Websites: Azure DNS is capable of hosting public DNS zones that manage DNS records for publicly accessible domains like websites and APIs. It offers a dependable and scalable solution for managing DNS resolution for high-traffic websites.
  • Private DNS Resolution: Azure DNS has the capability to host private DNS zones that manage DNS records for internal domain names and resources like virtual machines and Azure services. Private DNS resolution ensures the secure and efficient resolution of domain names within a private network.
  • Load Balancing: Azure DNS can be used in conjunction with Azure Traffic Manager to provide intelligent load balancing for applications running in multiple Azure regions. The traffic manager uses DNS-based traffic routing to direct traffic to the closest or healthiest endpoint to improve the application’s performance and availability.
  • Hybrid Cloud: Azure DNS can be used to integrate on-premises DNS infrastructure with Azure services. This integration allows businesses to extend their existing DNS infrastructure to the cloud, enabling secure and efficient communication between on-premises and cloud resources.


Azure DNS is anticipated to become even more crucial for the management of cloud-based services and applications. The need for scalable and dependable DNS infrastructure will increase as more companies transfer their activities to the cloud.

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