---
layout: default
title: First Factor
parent: Features
nav_order: 1
# First Factor
2-Factor authentication is a method in which a user is granted access by presenting
two pieces of evidence that she is who she claims to be.
**Authelia** requires usual username and password as a first factor.
<p align="center">
<img src="../images/1FA.png" width="400">
</p>
*IMPORTANT: This is currently the only method available as first factor. Using other methods will likely be possible when [WebAuthN](https://github.com/authelia/authelia/issues/241) is implemented*
Authelia supports several kind of users databases:
* An LDAP server like OpenLDAP or OpenAM.
* An Active Directory.
* A YAML file
