Authorization Code Flow

MFA - Duo

Duo is a multi-faceted provider and can only be used on your Auth0 tenant if all other factors are disabled.

How it works

Administrative setup

Your Duo account can be configured to support push notifications, SMS, OTP, phone callback, and more. See the Duo documentation for more details on Duo setup.

Create an integration in Duo Security of type Web SDK and use those credentials to fill in the Duo settings in the Auth0 Dashboard as noted below.

When enabling Duo in the Dashboard, you will need to click on the Duo factor and fill in a few settings fields in order to link your Duo account to Auth0.

MFA Duo Settings

If other factors are enabled alongside Duo, Duo will be unavailable. Duo is only available to end users when it is the sole factor enabled.

How to implement it

MFA Sessions

Duo does not provide an option for "Remember Me" behavior, so a 30-day MFA session is hard-coded to remember a logged-in user and not prompt them every time they log in. If you wish to force end-users to log in with Duo every time, you may implement this functionality by creating a rule with allowRememberBrowser: false instead.

Keep reading

End user experience

The user will see a prompt for the second factor with Duo, listing the options you have enabled in your Duo account.

Duo Login

Your end users can download Duo from Google Play or from the App Store for use as a second factor.