If you receive an alert from Azure Defender for Key Vault indicating suspicious IP activity, what is the immediate step to mitigate risk?

Enabling the Key Vault firewall is a crucial step in mitigating risk when suspicious IP activity is detected. The Key Vault firewall acts as a security boundary that restricts access to the vault based on IP address. By enabling the firewall, you can specify which IP addresses are permitted to access the Key Vault and deny all others. This helps to immediately block any unauthorized access attempts from potentially malicious sources, thereby protecting sensitive information stored in the Key Vault.

While modifying access policies or access control settings can be effective measures for controlling permissions, they do not provide immediate protection against suspicious activity detected at the network level. Similarly, creating an application security group is more about organizing resources and does not directly address the immediate concern of potential unauthorized access originating from untrusted IP addresses. Hence, enabling the firewall serves as a first line of defense in such scenarios.