Observed Signal · May 21, 2026 · Technical Guide · Source: DEV Community · Impact: 2/5 · Sentiment: Neutral
NIS2 Article 21: Azure Network Controls with Terraform
A technical how‑to mapping NIS2 Article 21 network-security requirements to concrete Azure resources implemented with Terraform. The article outlines six controls — hub-and-spoke network segmentation, a default-deny NSG baseline, egress control via forced tunneling to Azure Firewall, elimination of public PaaS endpoints (example: Key Vault with public access disabled), avoidance of static credentials using Managed Identities and scoped RBAC, and auditability via Infrastructure-as-Code (Git + terraform plan). The post includes Terraform code snippets for virtual network peering, NSG rules, route table entries, Key Vault configuration, and role assignments, and highlights that organizational measures beyond infrastructure are required for full NIS2 compliance. Publication date: 2026-05-21.
Practical technical guidance mapping EU NIS2 network-security requirements to Azure/Terraform is useful for cloud security and compliance teams but is not industry-shifting for the broader AdTech/MarTech ecosystem.
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Key Takeaways & Evidence Grounding
- The article maps NIS2 Article 21 network-security requirements to six technical controls implemented in Azure using Terraform.
- Six controls described: network segmentation (hub & spoke), default-deny NSG baseline, egress control via forced tunneling to Azure Firewall, zero public PaaS endpoints, no static credentials (Managed Identity + scoped RBAC), and auditability via IaC.
- Provides Terraform code snippets for azurerm_virtual_network_peering, NSG security_rule entries, route table routes for forced tunneling, azurerm_key_vault with public_network_access_enabled=false, and azurerm_role_assignment for Managed Identity permissions.
- Advises using Firewall logs, terraform plan, and Git commits as audit artifacts; notes full NIS2 compliance also requires organizational controls beyond infrastructure.
- Publication date indicated in page metadata: 2026-05-21.
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