2020-02-29 00:43:59 +00:00
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---
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layout: default
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title: Single Factor
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parent: Features
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nav_order: 3
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---
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# Single Factor
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**Authelia** supports single factor authentication to let applications
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send authenticated requests to other applications.
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Single or two-factor authentication can be configured per resource of an
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application for flexibility.
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For instance, you can configure Authelia to grant access to all resources
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matching `app1.example.com/api/(.*)` with only a single factor and all
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resources matching `app1.example.com/admin` with two factors.
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To know more about the configuration of the feature, please visit the
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documentation about the [configuration](../configuration/access-control.md).
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2020-02-29 00:43:59 +00:00
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## Proxy-Authorization header
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Authelia reads credentials from the header `Proxy-Authorization` instead of
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the usual `Authorization` header. This is because in some circumstances both Authelia
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and the application could require authentication in order to provide specific
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authorizations at the level of the application.
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