Using azure frontdoor with ad

Question

Pulumi · Accepted Answer

Azure Front Door is a scalable and secure entry point for fast delivery of your global web applications. Azure Active Directory (AD) is Microsoft's cloud-based identity and access management service. Using Azure Front Door with Azure AD can enhance security and performance by ensuring that only authenticated traffic can reach your applications.

To integrate Azure Front Door with Azure AD, you'll need to follow several steps to set up the appropriate resources:

1. **Create an Azure AD Application**: This represents your application in Azure AD and is used for authentication and authorization.

2. **Set up Azure Front Door**: This includes creating a Front Door profile, defining routing rules, and associating it with your application.

3. **Protect your application**: Adjust your application's authentication settings to require users to authenticate via Azure AD.

Below is a Pulumi TypeScript program that demonstrates how to set up Azure Front Door with Azure AD authentication for a web application. Please ensure that you have the necessary permissions to create these resources in your Azure subscription.

```typescript
import * as pulumi from "@pulumi/pulumi";
import * as azure from "@pulumi/azure";
import * as azuread from "@pulumi/azuread";

// Create an Azure AD application for your web application
const adApp = new azuread.Application("adApp", {
    displayName: "myWebApp", // Provide a unique display name for your application
});

// Define the Front Door profile
const frontDoorProfile = new azure.cdn.FrontdoorProfile("frontDoorProfile", {
    name: "myFrontDoorProfile",
    resourceGroupName: "myResourceGroup", // Ensure the resource group is already created or manage it with Pulumi as well
    skuName: "Standard_AzureFrontDoor", // Choose the appropriate SKU
});

// Define a Front Door endpoint for the application
const frontDoorEndpoint = new azure.cdn.FrontdoorEndpoint("frontDoorEndpoint", {
    name: "myFrontDoorEndpoint",
    // The profile ID obtained from the Front Door profile created previously
    cdnFrontdoorProfileId: frontDoorProfile.id,
    enabled: true,
});

// Assuming you have an existing origin for your web application,
// replace 'originResourceId' with your actual origin resource ID
const originResourceId = "/subscriptions/subId/resourceGroups/rg/providers/Microsoft.Network/frontDoors/myOrigin";

// Set up a route for the Front Door endpoint
const frontDoorRoute = new azure.cdn.FrontdoorRoute("frontDoorRoute", {
    name: "myFrontDoorRoute",
    // The endpoint ID obtained from the Front Door endpoint created previously
    cdnFrontdoorEndpointId: frontDoorEndpoint.id,
    // The origin ID where the traffic should be forwarded to
    cdnFrontdoorOriginId: originResourceId, // Replace with actual origin ID
    patternsToMatches: ["/"], // Define the URL patterns that this route will handle
    forwardingProtocol: "HttpsOnly", // Route traffic using HTTPS only
    enabled: true,
});

// Now that the Front Door is set up, you need to adjust your web application's
// code to require Azure AD authentication for the routes/paths you want protected.
// This typically involves middleware in your application that challenges unauthenticated users
// to sign in with Azure AD and validate the tokens received.
// This is beyond the scope of Pulumi but can be implemented in your application code.

// Export the Front Door endpoint URL so you can access it
export const frontDoorUrl = frontDoorEndpoint.hostName.apply(hostName => `https://${hostName}/`);
```

This program creates an Azure Front Door instance with a defined endpoint and route, which forwards traffic to your existing origin where your web application is hosted. The application is required to handle the actual authentication flow with Azure AD in your application code.

When running this Pulumi program, be sure to replace placeholders like `originResourceId` and `resourceGroupName` with actual values from your environment.

Remember to also configure Azure AD authentication within your web application code. This typically involves setting up OAuth 2.0 authorization code flow, validating ID tokens, and requiring authentication on your application routes.