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Frontegg SSO (OpenID Connect)

TL;DR

To secure access to ngrok with Frontegg Single Sign-On (SSO) using OpenID Connect:

  1. Configure Frontegg SSO
  2. Configure ngrok
  3. Test access to ngrok with Frontegg SSO

This article details how to configure Frontegg as the primary Identity Provider (IDP) for ngrok endpoints. By integrating Frontegg SSO with ngrok, you can:

  • Restrict access to ngrok endpoints only to users authenticated via Frontegg
  • Use Frontegg security policies and MFA authenticators.
  • Use Frontegg's Dashboard to facilitate access to ngrok apps.

Supported Features​

The ngrok integration with Frontegg supports:

  • SP-Initiated SSO: In this mode, users access ngrok endpoints and are redirected to Frontegg for authentication.

Requirements​

To configure an ngrok edge with Frontegg, you must have:

  • A Frontegg account with administrative rights to create apps
  • An ngrok Enterprise Account with an authtoken or admin access to configure edges with OpenID Connect.

Configuration Steps​

To integrate ngrok with Frontegg SSO, you will need to:

  1. Configure Frontegg with the ngrok app
  2. Configure ngrok with the SSO settings provided by Frontegg

Step 1: Configure Frontegg​

Add the ngrok App in Frontegg​

  1. Access the Frontegg Portal, and sign in using your Frontegg administrator account.

  2. On the left menu, click the environment you want to integrate with ngrok. In this example click the Development environment.

  3. On the left menu, click Authentication, click Login method, enter the URL https://idp.ngrok.com/oauth2/callback under the Hosted login field, and then click Save. Frontegg configuration

  4. On the left menu, click Env settings, and copy the value of both the Client ID and the API key fields.

  5. Click the Domains tab, and copy the value of the Domain name.

Grant access to Frontegg users​

Create a Frontegg user:

  1. On the left menu of the Frontegg Portal, click your environment, click Backoffice, click Accounts, and then click Add New.

  2. On the Add new account popup, enter a name for the account, ngrok.com in the Domain field, and then click Save.

  3. On the left menu, click Backoffice, click Users, and then click Add New.

  4. On the Add new user popup, enter a name, email, select the account you have created, and then click Save. Note: by default, the user is assigned the Admin role.

Step 2: Configure ngrok​

ngrok can leverage Frontegg SSO in two ways:

  • From the ngrok CLI (using the --oidc parameter)
  • From the ngrok dashboard

Option 1: ngrok CLI​

Note: For this tutorial, we assume you have an app running locally (i.e., on localhost:3000) with the ngrok client installed.

  1. Launch a terminal

  2. Enter the following command to launch an ngrok tunnel with Frontegg SSO:

    ngrok http 3000 --oidc=FRONTEGG_OAUTH_URL \
    --oidc-client-id=FRONTEGG_CLIENT_ID \
    --oidc-client-secret=FRONTEGG_CLIENT_SECRET \

    Note: Replace the following with the values:

    • FRONTEGG_OAUTH_URL: Your Frontegg Domain name URL (i.e. https://app-123456.frontegg.com).
    • FRONTEGG_CLIENT_ID: The client id you copied from Frontegg.
    • FRONTEGG_CLIENT_SECRET: The API key you copied from Frontegg.

    Alternatively, add the --domain YOUR_DOMAIN argument to get your custom URL, replacing YOUR_DOMAIN with your URL of preference.

  3. Copy the URL available next to Forwarding (for example, https://frontegg-sso-test.ngrok.app).

  4. Skip to Step 3

Option 2: ngrok Edge​

To configure an edge with Frontegg:

  1. Access the ngrok Dashboard and sign in using your ngrok account.

  2. On the left menu, click Cloud Edge and then click Edges.

  3. If you don't have an edge already set to add Frontegg SSO, create a test edge:

    • Click + New Edge.
    • Click Create HTTPS Edge.
    • Click the pencil icon next to "no description", enter Frontegg SSO OIDC as the edge name and click Save.

  4. On the edge settings menu, click OIDC.

  5. Click Begin setup and enter the following values into the fields: Frontegg config in ngrok

    • Issuer URL: Your Frontegg Domain name URL (i.e. https://app-123456.frontegg.com).
    • Client ID: The client id you copied from Frontegg.
    • Client Secret: The API key you copied from Frontegg.

  6. Click Save at the top, and then click the left arrow to go back to the Edges page.

  7. Launch a tunnel connected to your Frontegg edge:

Note

For this step, we assume you have an app running locally (i.e. on localhost:3000) with the ngrok client installed.

  1. Click Start a tunnel.

  2. Click the copy icon next to the tunnel command. tunnel config

  3. Launch a tunnel:

    • Launch a terminal.
    • Paste the command but replace http://localhost:80 with your localhost app address (i.e., http://localhost:3000).
    • Click Enter and an ngrok tunnel associated with your edge configuration will launch.

  4. To confirm that the tunnel is connected to your edge:

    • Return to the ngrok dashboard
    • Close the Start a tunnel and the Tunnel group tabs
    • Refresh the test edge page. Under traffic, you will see the message You have 1 tunnel online. Start additional tunnels to begin load balancing. tunnel confirmed

  5. In the test edge, copy the endpoint URL (you use this URL to test the Frontegg Authentication). tunnel url

Step 3: Test the integration​

  1. In your browser, launch an incognito window.

  2. Access your ngrok tunnel (i.e., https://frontegg-sso-test.ngrok.app). Use the copied endpoint URL.

  3. You should be prompted to log in with your Frontegg credentials.

  4. After logging in, you should be able to see your web app.