Duo.com is a plugin that can be used for both Staff Memeber and Clients to use Duo service to provide simple two-factor authentication via the tool of your choice: phone callback, SMS-delivered one-time passcodes, Duo mobile app to generate one-time passcodes, Duo mobile app for smartphone push authentication or Duo hardware token to generate one-time passcodes.
How to obtain details for module configuration
You will need to set up an account in Duo administration interface to obtain Integration Key, Secret Key, and API hostname. Double check your integration while setting it up in HostBill, if you don't provide valid details you may get locked out from your admin area. If that happens your only option is to remove this plugin.
This integration works with both Duo free and paid accounts.
Once the module is configured it can be activated by admins in My Profile section and by clients and client contacts in Security → Multi-factor authentication. To activate enter information about your device and your phone number, activate DuoApp.
Next choose if you want to use a Push notification or a passcode sent via text message or via Duo App. Once you enter the passcode the module will be activated.
After configuring DuoSecurity factor authentication, during the logging in to the system, an authorization page appears in which you must authorize using DuoSecurity passcodes.