Aditya Katira
Aditya Katira


Aditya Katira

Azure Defense in Depth

Azure Defense in Depth

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Aditya Katira
·Nov 28, 2022
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What is Defense in Depth (DiD)?

  • Strategy to slow the advance of an attack to get unauthorized access to information.
  • Layered approach: Each layer provides protection, so if one layer is breached, a subsequent prevents further exposure.
  • Applied by Microsoft, both in physical data centers and across Azure services.



  • In almost all cases attackers are after data.
  • Data can be in database, stored on disk inside VMs, on a SaaS application such as a Microsoft 365 app or in cloud storage.
  • Those storing and controlling access to data to ensures that it's properly secured
  • Often regulatory requirements dictates controls & processes to ensure confidentiality, integrity, and availability.


  • Ensure applications are secure and free of vulnerabilities.
  • Store sensitive application secrets in a secure storage medium.
  • Make security a design requirement for all application development.
  • Integrate security into the application development life cycle,


  • Secure access to virtual machines.
  • Implement endpoint protection and keep systems patched and current.
  • Malware, unpatched systems, and improperly secured systems open your environment to attacks.


  • Limit communication between resources.
  • Deny by default.
  • Allow only what is required
  • Restrict inbound internet access and limit outbound, where appropriate.
  • Implement secure connectivity to on-premises networks.


  • Use distributed denial of service (DDoS) protection to filter large-scale attacks before they can cause a denial of service for end users.
  • Use perimeter firewalls to identify and alert on malicious attacks against your network.

Identity and access

  • Control access to infrastructure and change control.
  • Access granted is only what is needed
  • Use single sign-on and multi-factor authentication.
  • Audit events and changes.

Physical security

  • Building security & controlling access to computing hardware.
  • First line of defense

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