authelia/docs/2factor/duo-push-notifications.md
2019-12-05 23:20:12 +01:00

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# Duo Push Notification
Using mobile push notifications is becoming the new trendy way to validate
the second factor of a 2FA authentication process. [Duo](https://duo.com/)
is offering an API to integrate this kind validation and **Authelia** leverages
this mechanism so that you can simply push a button on your smartphone to be
securely granted access to your services.
<p align="center">
<img src="../../docs/images/2FA-PUSH.png" width="400">
</p>
In order to use this feature, you should first create a free account on Duo
(up to 10 users), create a user account and attach it a mobile device. The name
of the user must match the name of the user in your internal database (LDAP).
In Duo interface, click on *Applications* and *Protect an Application*. Then
select the option called *Partner Auth API*. This will generate an integration key,
a secret key and a hostname. You can set the name of the application to
**Authelia** and then you must add the generated information to your configuration
as:
duo_api:
hostname: api-123456789.example.com
integration_key: ABCDEF
secret_key: 1234567890abcdefghifjkl
This can be seen in [config.template.yml](../../config.template.yml) file.
When selecting *Push Notification* at the second factor stage, you will
automatically receive a push notification on your phone to grant or deny access.
<p align="center">
<img src="../../docs/images/duo-push-1.jpg" width="400">
<img src="../../docs/images/duo-push-2.png" width="400">
</p>
## Limitations
Users must be enrolled via the Duo Admin panel, they cannot enroll a device from
**Authelia** yet.
## FAQ
### Why don't I have access to the *Push Notification* option?
It's likely that you have not configured **Authelia** correctly. Please read this
documentation again and be sure you had a look at [config.template.yml](../../config.template.yml).