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KB-9139: MFA for Amazon WorkSpaces using RADIUS with Centrify

App Access Service ,   App Gateway Service ,  

23 May,18 at 09:19 PM

Question:


How to configure Centrify for MFA login with Amazon WorkSpaces.


Answer:



A Centrify Community Techblog is also available that provides a detailed walk through of setting up MFA login with Amazon WorkSpaces using Centrify at the following location: https://community.centrify.com/t5/TechBlog/Howto-Enforcing-Multi-Factor-Authentication-MFA-on-AWS/ba-p/31883


The following steps show the Centrify settings needed for configuring MFA login with Amazon WorkSpaces.

Configure Centrify Connector as RADIUS Server
https://docs.centrify.com/en/centrify/adminref/index.html#page/cloudhelp/Configuring_the_Centrify_Connector_for_use_as_a.2.html

  • Click Settings > Network > Centrify Connector.
  • Select an existing connector or add a new one.
  • Click RADIUS.
  • Select the Enable incoming RADIUS connections checkbox.
  • Provide the port number in which the Centrify Connector talks to Centrify Identity Services. The default port number is 1812.
  • Click Save.
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Create Authentication Profile
https://docs.centrify.com/en/centrify/adminref/index.html#page/cloudhelp/authentication-profiles.html

  • Click Settings > Authentication.
  • Click Add Profile on the Authentication Profiles page.
  • Enter a unique name for the profile.
  • Select the Authentication Mechanisms
  1. Challenge 1: Password
  2. Challenge 2: Desired second factor (Mobile Authenticator, SMS, Email, etc)

Important: Centrify recommends that you select a profile where the first challenge is "Password" because the user prompt from the RADIUS client defaults to Username/Password, regardless of the authentication mechanism(s) you choose for the first challenge. If you select a profile where the first challenge is not Password, for example it is Mobile Authenticator, then users may not successfully authenticate with the RADIUS client because we are expecting a mobile authenticator code but users enter their username/password based on the UI prompt.

  • ​Click Save.
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Create Policy set
https://docs.centrify.com/en/centrify/adminref/index.html#page/cloudhelp/Scenario_policySettings.2.html

  • Click Core Services > Policies > Add Policy Set.
  • Click Add Policy Set.
  • Enter a name for the policy set.
  • Click User Security Policies > RADIUS.
  • Select Yes in the Allow RADIUS client connections dropdown.
  • Select the Require authentication challenge checkbox to require that users provide a secondary authentication mechanism to log in via the RADIUS client.
  • Select the authentication profile (Name from “Create Authentication Profile” step) from the dropdown.
  • Click Save.
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Configure the RADIUS client information for each AWS AD Connector instance
https://docs.centrify.com/en/centrify/adminref/index.html?version=1526830877#page/cloudhelp%2FScenario_RADIUS.3.html

  • Click Authentication > RADIUS Connections > Client tab > Add to configure your RADIUS client.
  • Enter a name for the RADIUS client.
  • Enter the Client Hostname or IP Address: IP of AWS AD Connector instance.
  • Enter the Client Secret: Shared secret code from AWS AD Connector instance.
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  • Click Response.
  • Select Mechanism Response Options - Select a response option for each mechanism. Use Push to respond from the mechanism or Enter Code to manually respond.
  • Click Save.
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