[Launched] Generally Available: Private subnet
Here is a structured summary of the Generally Available: Private Subnet launch announcement and key information from the official Azure Updates page referenced (https://azure.microsoft.com/updates?id=492953):
General Availability of Azure Private Subnet
- Announcement Date: May 2025[1]
- Feature Status: Launched (now generally available for all Azure customers)
- Description: The "private subnet" feature for Azure Virtual Network is now production-ready, enabling customers to create subnets with enhanced network isolation and security.
- Key Benefits:
- Enhanced Security: Private subnets help restrict outbound internet access, reducing the risk of unauthorized data exfiltration.
- Explicit Internet Access: VMs in a private subnet do not have default outbound internet access, requiring explicit configuration of NAT gateways or other routes for connectivity[5].
- Greater Control: Organizations gain more granular management over their Azure VM network traffic, allowing them to enforce stricter security policies and compliance requirements[5].
- Application: This is particularly important for compliance-driven or security-sensitive environments, as it prevents VMs from bypassing enterprise firewalls and content filters without authorization[5].
- Action for Administrators: With upcoming changes (such as the disabling of default internet access for Azure VMs), administrators are advised to review and reconfigure their subnet architecture to use private subnets and explicitly define required outbound access routes[5].
How to Use Private Subnets
- Creation: Private subnets can be created directly in the Azure Portal by adding a new subnet to a Virtual Network and setting the appropriate properties (such as disabling default outbound access).
- Migration: Existing resources, like VMs, can be moved into private subnets for better isolation and security.
- Outbound Access: Requires explicit configuration (e.g., NAT Gateway, Azure Firewall, or custom routing) to enable internet connectivity for resources within a private subnet[5].
Additional Notes
- Product Status: The feature is now fully released, production-ready, and available to all Azure customers[1].
- Scope: This addresses both new and existing Azure deployments, helping organizations prepare for upcoming changes in Azure VM network policies.
In summary: The general availability of Azure private subnets marks a significant step toward enhanced network security and control for Azure environments, allowing administrators to explicitly manage outbound internet access and reduce risks associated with unauthorized connectivity[1][5].
อ้างอิงค์ : https://azure.microsoft.com/updates?id=492953
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