TMA-AZURE-2.1.2
Ensure that Network Security Groups are Configured for Databricks Subnets
Description
Network Security Groups (NSGs) should be implemented to control inbound and outbound traffic to Azure Databricks subnets, ensuring only authorized communication. NSGs operate using a rule-based model that includes both explicit allow/deny rules and an implicit deny at the end of the rule list. This means that any traffic not explicitly allowed is automatically denied. To ensure secure and predictable behavior, NSGs should be configured with explicit deny rules for known unwanted traffic, in addition to the default implicit deny, to improve visibility and auditability of blocked traffic. This approach helps enforce least privilege and minimizes the risk of unauthorized access to Databricks resources. Using NSGs with both explicit allow and deny rules provides clear documentation and control over permitted and prohibited traffic. While Azure NSGs implicitly deny all traffic not explicit...
How it is checked
Audit method: Manual review
This recommendation cannot be checked automatically. A scan lists it with these instructions when you pass --include-manual.
Audit from Azure Portal 1. Navigate to Virtual Networks > Subnets, and review NSG assignments. Audit from Azure CLI az network nsg list --query "[].{Name:name, Rules:securityRules}" Audit from PowerShell Get-AzNetworkSecurityGroup -ResourceGroupName <resource-group-name>
How it is fixed
Fix method: Guidance or infrastructure patch
Remediate from Azure Portal 1. Assign NSG to Databricks subnets under Networking > NSG Settings.
Properties
- Operating systems
- Any
- Tags
- azurecloudnetwork
- Reference
- CIS Microsoft Azure Foundations Benchmark v6.0.0 - 2.1.2 Ensure that Network Security Groups are Configured for Databricks Subnets