Azure Security Private Endpoint

Protecting Azure Private Endpoints in Azure

How to secure your private endpoints using Network Security Groups

Introduction

Azure Private Endpoint is a powerful feature that allows you to securely connect to Azure services over a private link. By using Network Security Groups (NSGs), you can control the traffic allowed into your private endpoints, enhancing security and ensuring that only authorized traffic can access your resources.

Implementation Guide

  1. Enable Network Policies for Private Endpoints

    • Ensure that the PrivateEndpointNetworkPolicies property is enabled on the subnet containing your private endpoint resources.

    • Use Azure PowerShell or CLI to enable this feature:

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      az network vnet subnet update --name '<subnet-name>' --vnet-name '<vnet-name>' --resource-group '<resource-group>' --disable-private-endpoint-network-policies false

  2. Create or Update NSGs

    • Create a new NSG or update an existing one to include rules that match the private IP addresses of your private endpoints.

    • Define inbound and outbound security rules to control traffic. For example:

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      az network nsg rule create --resource-group '<resource-group>' --nsg-name '<nsg-name>' --name AllowPrivateEndpoint --priority 100 --source-address-prefixes '<private-endpoint-ip>' --destination-port-ranges 443 --access Allow --protocol Tcp --direction Inbound

  3. Associate NSGs with Subnets

    • Associate the NSG with the subnet that contains your private endpoints:

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      az network vnet subnet update --name '<subnet-name>' --vnet-name '<vnet-name>' --resource-group '<resource-group>' --network-security-group '<nsg-name>'

  4. Verify Configuration

    • Ensure that the NSG rules are correctly applied and that traffic is being controlled as expected. You can use Azure Network Watcher to monitor and diagnose network issues.

Conclusion

Using NSGs to control traffic into Azure Private Endpoints provides an additional layer of security, ensuring that only authorized traffic can access your resources. By following the steps outlined above, you can effectively manage and secure your private endpoints.

Learn More

For more detailed information, refer to the following Microsoft Learn articles: