Control: 5.1.6 Ensure that Network Security Group Flow logs are captured and sent to Log Analytics
Description
Ensure that network flow logs are captured and fed into a central log analytics workspace.
Network Flow Logs provide valuable insight into the flow of traffic around your network and feed into both Azure Monitor and Azure Sentinel (if in use), permitting the generation of visual flow diagrams to aid with analyzing for lateral movement, etc.
Remediation
From Azure Portal
- Navigate to the
Azure MonitorBlade - Select
Networking - Select the
Network Watcheroption - Then
NSG Flow Logs - Select
+ Create - Select the desired Subscription.
- Select the
+ NSGand the network service group for a network. - Select the Storage Account to log and the retention in days to retain the log.
- In
Configurationskeep the default value of v2. If you desire even further analysis selectEnable Traffic Analytics, then the processing interval, and the Log Analytics Workspace. - Tag as desired, then go to
Create. Then create.
Warning: The remediation policy creates remediation deployment and names them by concatenating the subscription name and the resource group name. The MAXIMUM permitted length of a deployment name is 64 characters. Exceeding this will cause the remediation task to fail.
Default Value
By default Network Security Group logs are not sent to Log Analytics.
Usage
Run the control in your terminal:
powerpipe control run azure_compliance.control.cis_v150_5_1_6Snapshot and share results via Turbot Pipes:
powerpipe loginpowerpipe control run azure_compliance.control.cis_v150_5_1_6 --shareSQL
This control uses a named query:
manual_control