DuoSecurity

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Duo® Security increases security with Two Factor Authentication (2FA). 2FA using Duo Security combines traditional account credentials (like a username and password) with a code or other verification from a device like a smart phone. Requiring both to log in decreases the threat of a leaked password.

Use of Duo Security is free for up to 10 accounts, and the Duo® Mobile app is available on all major smartphone platforms.

In WHMCS 8.9 and later, our Duo Security integration uses Duo Universal Prompt, which uses Duo Push by default. This pushes login or transaction details to your phone, allowing for immediate one-tap approval. If you already used Duo Security with the previous integration, you must log in to the Duo portal and upgrade your API credentials to use Duo Universal Prompt.

  • Duo has announced that support for the previous iframe-based Duo Prompt will end on March 30, 2024. Duo's support team cannot troubleshoot issues with iframe-based Duo Prompt after this date.
  • After you upgrade to WHMCS 8.9 or later, we strongly recommend activating Duo Universal Prompt in your Duo customer portal to ensure continued functionality. If you do not do this, your customers may experience problems.
  • You will require a Duo Security account with an account level of Duo MFA or higher in order to access the Duo API. Click here to sign up.

Configuring Duo Security

Before you can configure Duo Security globally in WHMCS, you must perform additional steps to retrieve your Duo credentials.

To configure Duo Security in WHMCS:

  1. Log in to your Duo Security account.
  2. Click Applications in the left sidebar.
  3. Click Protect an Application.
  4. Perform the appropriate step for your WHMCS version:
    • For WHMCS 8.9 and later, click Protect this Application under Web SDK.
    • For WHMCS 8.8 and earlier, click Protect this Application under Auth API.
      If you don't see this option, contact Duo support.
  5. Retrieve the following values:
    Duo Universal Prompt credentials (WHMCS 8.9 and later)
    • For WHMCS 8.9 and later, retrieve the Client ID, Client Secret, and API hostname values.
    • For WHMCS 8.8 and earlier, retrieve the Integration Key, Secret Key, and API hostname values.
  6. Go to Configuration () > System Settings > Two Factor Authentication or, prior to WHMCS 8.0, Setup > Staff Management > Two-Factor Authentication.
  7. Click Activate for Duo Security.
  8. To enable Duo Security as a two-factor option for staff, check Enable for Staff.
  9. To enable Duo Security for customers, check Enable for Clients.
  10. Enter the credentials and hostname that you retrieved from your Duo Security account.
  11. Click Save Changes.

Enabling Duo Security as an Admin User

To enable Duo Security for an admin:

  1. Perform the steps above to configure Duo Security.
  2. Navigate to the My Account page within the WHMCS Admin Area.
  3. Click Enable Two-Factor Authentication.
  4. Follow the instructions to complete the setup process.

Enabling Duo Security as a Client

To enable Duo Security as a client:

  1. Log in to the WHMCS Client Area.
  2. Go to Account > My Account > Security Settings or, prior to WHMCS 8.0, My Account > Security Settings.
  3. Click Enable Two-Factor Authentication.
  4. Follow the instructions to complete the setup process.

On all future login attempts, the client will be asked to complete the Two-Factor Authentication process.

Using Existing Duo Accounts With WHMCS

The WHMCS Duo integration uses the following format for admins that it transmits to Duo:

adminemailaddress:adminemailaddress:whmcslicensekey

You can use existing Duo accounts or users to complete two-factor authentication into the Admin Area. To do this, use the alias function in Duo to create an alias for the admin. For more information, see Duo's Aliases Guide documentation.

Reactivating a user

When a user replaces or loses a two-factor device, they will need to reauthenticate DuoSecurity in order to enable the prompt. To achieve this, an admin will need to delete and restore the users from within the Duo dashboard.

For more information, see Duo's documentation.

Troubleshooting

The second factor you supplied was incorrect. Please try again

Seeing this error when activating the DuoSecurity method for the first time indicates that the code does not match what DuoSecurity expects. This is caused by the time on your server not matching DuoSecurity's clocks.

You can see the time in the top-right corner of your WHMCS Admin Area. WHMCS retrieves this directly from your server's PHP configuration and you must ensure that the server time is synced exactly with UTC. For example, if the server time is 00:01 and the time at DuoSecurity is 00:00, you will see this error. Syncing the server with NTP to verify the time will resolve this.

Different timezones are taken into account, ensuring that these differences won't cause a problem.

Invalid Integration

An Invalid Integration error is displayed on the Duo authentication screen when the keys/hostname used in Duo module configuration are incorrect. Please reconfigure the module settings by following the steps above.

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