2022-06-15 07:51:47 +00:00
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---
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title: "Authentication"
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description: "An overview of a authentication."
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lead: "An overview of a authentication."
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2022-06-28 05:27:14 +00:00
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date: 2022-06-15T17:51:47+10:00
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2022-06-15 07:51:47 +00:00
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draft: false
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images: []
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menu:
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overview:
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parent: "prologue"
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weight: 210
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toc: false
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aliases:
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- /docs/features/2fa/
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---
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Multi-Factor Authentication or MFA as a concept is separated into three major categories. These categories are:
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* something you know
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* something you have
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* something you are
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Modern best security practice dictates that using multiple of these categories is necessary for security. Users are
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unreliable and simple usernames and passwords are not sufficient for security.
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__Authelia__ enables primarily two-factor authentication. These methods offered come in two forms:
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2022-12-07 09:43:02 +00:00
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* 1FA or first-factor authentication which is handled by a username and password. This falls into the
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*something you know* categorization.
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2022-06-15 07:51:47 +00:00
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* 2FA or second-factor authentication which is handled by several methods including one-time passwords, authentication
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keys, etc. This falls into the *something you have* categorization.
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In addition to this Authelia can apply authorization policies to individual website resources which restrict which
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identities can access which resources from a given remote address. These policies can require 1FA, 2FA, or outright deny
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access depending on the criteria you configure.
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