Account should have a configured activity log alert for deleting the SQL Server firewall rule

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Warning: This rule will be deprecated 18 December 2023 as part of the update to Azure CIS version 2.0.0

Description

Create an activity log alert for the “Delete SQL Server Firewall Rule.”

Default value

By default, no monitoring alerts are created or active.

Rationale

Monitoring for Create or Update SQL Server Firewall Rule events gives insight into network access changes and may reduce the time it takes to detect suspicious activity.

Impact

There will be a substantial increase in log size if there are a large number of administrative actions on a server.

Remediation

From the console

Navigate to Monitor blade.
Select Alerts.
Click Create.
Click on Alert rule.
Under the Scope tab, click Select scope.
In the Select a resource window,select the appropriate filters:
- Filter by subscription: < choose the subscription alerts are needed for >
- Filter by resource type: Server Firewall Rule (servers/firewallRules)
- Filter by location: All
- Click on the subscription name or resource group that the Log Alert Rule will be applied to
Verify that the selection preview shows:
- All server firewall rule (servers/firewallrules) or < your selected resource >
- < Resource Name > - The subscription, group, or resource you selected
Click Done.
Under the Condition tab, click Add Condition. The Select a signal window may automatically open without clicking.
In the Select a signal window, under the “Signal Name” heading, click Delete server firewall rule (Microsoft.Sql/servers/firewallRules).
Under the Actions tab, choose appropriately:
- Select action groups - If you have an existing action group to notify the necessary personnel
- Create action group - If you do not have an existing action group or want to create a new one
Under the Details tab, fill in:
- Resource group - Select the resource group you want the alert rule to reside in
- Alert rule name - Give your alert a recognizable and standardized name
- Alert rule description - (Optional)
Click Review + create then verify the summary details.
Click Create.

From the command line

az account get-access-token --query "{subscription:subscription,accessToken:accessToken}" --out tsv | xargs -L1 bash -c 'curl -X PUT -H "AuthorizationBearer $1" -H "Content-Typeapplication/json" https://management.azure.com/subscriptions/$0/resourceGroups/<Resource_Group_To Create_Alert_In>/providers/microsoft.insights/activityLogAlerts/<Unique_Alert_Name>?api-version=2017-04-01 -d@"input.json"'

input.json contains the following request body JSON data:

{
  "location": "Global",
  "tags": {},
  "properties": {
    "scopes": [
      "/subscriptions/<Subscription_ID>"
    ],
    "enabled": true,
    "condition": {
      "allOf": [
        {
          "containsAny": null,
          "equals": "Administrative",
          "field": "category"
        },
        {
          "containsAny": null,
          "equals": "Microsoft.Sql/servers/firewallRules/write",
          "field": "operationName"
        }
      ]
    },
    "actions": {
      "actionGroups": [
        {
          "actionGroupId": "/subscriptions/<Subscription_ID>/resourceGroups/<Resource_Group_For_Alert_Group>/providers/microsoft.insights/actionGroups/<Alert_Group>",
"webhookProperties": null
        }
      ]
    },
  }
}