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This article provides an overview of your options for preventing your Azure managed disks from being imported or exported. Importing a managed disk means uploading it to Azure, and exporting a managed disk means downloading it from Azure.
Limit disk import and export with a custom role
To limit the number of people who can import or export managed disks or snapshots using Azure RBAC, create a custom RBAC role that doesn't have the following permissions:
- Microsoft.Compute/disks/beginGetAccess/action
- Microsoft.Compute/disks/endGetAccess/action
- Microsoft.Compute/snapshots/beginGetAccess/action
- Microsoft.Compute/snapshots/endGetAccess/action
Any custom role without those permissions can't upload or download managed disks.
Restrict disk uploads with Microsoft Entra authentication
If you're using Microsoft Entra ID to control resource access, you can also use it to restrict uploading of Azure managed disks. When a user attempts to upload a disk, Azure validates the identity of the requesting user in Microsoft Entra ID, and confirms that user has the required permissions. To learn more, see Secure downloads and uploads of Azure managed disks.
Restrict disk transfers with Private Link
You can use private endpoints to restrict the upload and download of managed disks and more securely access data over a private link from clients on your Azure virtual network. The private endpoint uses an IP address from the virtual network address space for your managed disks. Network traffic between clients on their virtual network and managed disks only traverses over the virtual network and a private link on the Azure backbone network, eliminating exposure from the public internet. Use a disk access resource to facilitate private link connections to your disks. For details, see the portal or the Azure CLI and Azure PowerShell article.
Disable public disk access with Azure Policy
Use the Configure managed disks to disable public network access built-in Azure Policy to block managed disk imports and exports over public endpoints. For private network access, see Restrict disk transfers with Private Link.
Prevent disk exports with network access policy
Each managed disk and snapshot has its own NetworkAccessPolicy parameter that can prevent the resource from being exported. You can use the Azure CLI or Azure PowerShell module to set the parameter to DenyAll, which prevents the resource from being exported.