To configure multi-factor authentication using a RADIUS server on the RSTS
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Start a web browser and open the URL of the RSTS administration interface. https://<webapplication>/RSTS/admin Use the configuration password assigned during installation to log in. 
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On the home page, click Authentication providers. 
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On the Authentication Providers page, select the Default Active Directory default provider and click Edit. 
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On the Edit page, select the Authentication provider tab and edit the following settings. - 
Directory Type > Active Directory: enabled 
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Connection Information > Use Current Domain: enabled 
 
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Select the Two Factor Authentication tab and edit the settings for your Defender Security Server. - 
Two Factor Authentication Settings > RADIUS: enabled 
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Server, Port, Shared Secret and Username Attributes: Connection data for the RADIUS server. 
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(Optional) Connection Information > Pre-authenticate For ChallengeResponse: Uses the response text of the defender, instead of the default RADIUS response text. 
 
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Switch to the home page and select Applications. 
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On the Applications page, click Add Application. 
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On the Edit page, select the General Settings tab and edit the following settings. - 
Application Name, Authentication Provider, Realm/Client_ID/Issuer, Redirect Url 
 The redirect URL for the Web Portal (Redirect Url) is formed as follows: https://<Server>/<Application Name>/ 
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Select the Certificates tab and under Signing Certificate (Required) activate the signing certificate that you specified when installing the RSTS. For more information, see Multi-factor authentication with One Identity Defender. 
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Click Finish. 
