Control: 7.1.1.7 Ensure that virtual network flow logs are captured and sent to Log Analytics

Description

Ensure that virtual network flow logs are captured and fed into a central log analytics workspace.

Virtual network flow logs provide critical visibility into traffic patterns. Sending logs to a Log Analytics workspace enables centralized analysis, correlation, and alerting for faster threat detection and response.

Remediation

From Azure Portal

1. Go to Network Watcher.
2. Under Logs, click Flow logs.
3. Click + Create.
4. Select a subscription.
5. Next to Flow log type, select Virtual network.
6. Click + Select target resource.
7. Select Virtual network.
8. Select a virtual network.
9. Click Confirm selection.
10. Select a storage account, or create a new storage account.
11. Set the retention in days for the storage account.
12. Click Next.
13. Under Analytics, for Flow logs version, select Version 2.
14. Check the box next to Enable traffic analytics.
15. Select a processing interval.
16. Select a Log Analytics Workspace.
17. Click Next.
18. Optionally, add Tags.
19. Click Review + create.
20. Click Create.
21. Repeat steps 1-20 for each subscription or virtual network requiring remediation.