Best Practices for Azure Private DNS Zones

Hi ares,

Greetings,

Welcome to the Microsoft Q&A Platform. Thank you for reaching out & I hope you are doing well.

When managing private DNS zones in Azure, the best approach depends on your organization's architecture, scalability needs, and management preferences. Here are some recommended practices:

Single Private DNS Zone:

• Simplifies management by consolidating all DNS records in one place.
• Easier to maintain and update DNS records.

Multiple Private DNS Zones:

• Better organization by separating services (e.g., storage, SQL, etc.).
• Reduces the risk of naming conflicts and improves clarity.
• Allows for different access controls and policies for each service.

IMP: For each PAAS Services separate DNS Zone should be used.

1. Custom DNS Zone Naming:
   • Using a custom DNS zone like azure.contoso.com is a good practice as it provides a clear namespace for your Azure resources.
   • This approach allows you to create subdomains for different services, such as:
   • storage.azure.contoso.com
   • sql.azure.contoso.com
   • This structure helps in organizing resources logically and can improve security by allowing you to apply specific policies to each subdomain.

Refer: https://learn.microsoft.com/en-us/azure/private-link/private-endpoint-dns

DNS Zones for Services:

• For services like privatelink.database.windows.net, you can create a custom DNS zone specifically for your database services:
  • Example Structure:
    • DNS Zone: database.azure.contoso.com
      • Records:
        • sql1.database.azure.contoso.com (for SQL Database private endpoint).

Refer: https://learn.microsoft.com/en-us/azure/dns/dns-for-azure-services

NOTE: whether to use a single private DNS zone or multiple zones depends on your specific use case, the number of services, and your management preferences. For most scenarios, creating a custom DNS zone (like azure.contoso.com) and organizing services into subdomains is a recommended approach. This method provides clarity, reduces the risk of conflicts, and allows for better management of DNS records.

Hope this clarifies.

Thanks,

Ganesh

Please don’t forget to close the thread by clicking "Accept the answer" wherever the information provided helps you, as this can be beneficial to other community members.