Ensure deployment slot is integrated with a virtual network

HighLevel 1Manual reviewazure

Description

Integrate function app deployment slots with a virtual network to enable access to resources in or through a non-internet-routable virtual network. This recommendation applies to function apps using the Premium or Dedicated (App Service) plans, which support deployment slots and virtual networking. Integrate function app deployment slots with a virtual network for increased security and control.

How it is checked

Audit method: Manual review

This recommendation cannot be checked automatically. A scan lists it with these instructions when you pass --include-manual.

Audit from Azure Portal 1. Go to App Services or Function App. 2. Click the name of a function app. 3. Under Deployment, click Deployment slots. 4. Click the name of a deployment slot. 5. Under Settings, click Networking. 6. Under Outbound traffic configuration, next to Virtual network integration, ensure that a virtual network and subnet name are displayed. 7. Repeat steps 1-6 for each function app and deployment slot. Audit from Azure CLI Run the following command to list function apps: az functionapp list For each function app, run the following command to list deployment slots: az functionapp deployment slot list --resource-group <resource-group-name> -- name <function-app-name> For each deployment slot, ensure that virtualNetworkSubnetId is set to a virtual network subnet ID.

How it is fixed

Fix method: Guidance or infrastructure patch

Remediate from Azure Portal 1. Go to App Services or Function App. 2. Click the name of a function app. 3. Under Deployment, click Deployment slots. 4. Click the name of a deployment slot. 5. Under Settings, click Networking. 6. Under Outbound traffic configuration, next to Virtual network integration, click Not configured. 7. Click Add virtual network integration. 8. Select an existing App Service Plan connection, or select New connection and select a subscription, virtual network, and subnet. 9. Click Connect. 10. Repeat steps 1-9 for each function app and deployment slot requiring remediation.

Properties

Operating systems: Any
Tags: azurecloudcomputenetwork
Reference: CIS Microsoft Azure Compute Services Benchmark v2.0.0 - 2.4.13 Ensure deployment slot is integrated with a virtual network