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4.1.2. Azure Kubernetes Service (AKS) Security

đź’ˇ First Principle: AKS security operates at multiple layers: cluster infrastructure, network, and workload. Each layer requires specific security configurations.

Scenario: You're deploying a production AKS cluster that needs network isolation, secure authentication, and proper image management.

AKS Security Layers

LayerSecurity Controls
Cluster InfrastructurePrivate cluster, authorized IP ranges
NetworkNetwork policies, Azure CNI, private endpoint
AuthenticationMicrosoft Entra integration, RBAC
WorkloadPod security, network policies
ImagesACR authentication, image scanning

AKS Authentication Options

  • Local accounts: Kubernetes-native (less secure)
  • Microsoft Entra ID: Enterprise identity integration
  • Managed Identity: For AKS to access Azure resources

⚠️ Exam Trap: Not disabling local accounts when using Microsoft Entra integration. Local accounts bypass Entra ID authentication—disable them for production clusters.

Alvin Varughese
Written byAlvin Varughese
Founder•15 professional certifications