Subnets should be associated with a Network Security Group

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Description

This rule checks whether subnets in Azure are associated with a Network Security Group. Ensuring that subnets are associated with a Network Security Group helps enhance the security posture of the Azure environment by adding an additional layer of protection to network traffic within the subnet.

Remediation

To associate a subnet with a Network Security Group in Azure, follow these steps:

Navigate to the Azure portal and open the ‘Subnets’ blade for the desired virtual network.
Select the subnet that needs to be associated with a Network Security Group, go to the ‘Settings’ tab, and under ‘Security’, associate the desired Network Security Group. For detailed instructions, see: Associate or dissociate a network security group to or from a subnet.