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Two-factor authentication (2FA) strengthens access security by requiring two methods (also referred to as factors) to verify your identity. These factors can include something you know - like a username and password, plus something you have - like a smartphone app to approve authentication requests.
2FA protects against phishing, social engineering and password brute-force attacks and secures your logins from attackers exploiting weak or stolen credentials.
Duo integrates with Microsoft Windows client and server operating systems to add two-factor authentication to Remote Desktop and local logons.
From the left panel choose Users and then click the Add User button on the right:
Add the username for your VPS - this must match:
On the next page, complete the form to finish setting up the account.
To test your setup, attempt to log in to your newly-configured system as a user enrolled in Duo.
If installed and configured correctly, you should see something like this:
Duo Push: Send a request to your mobile device. To use Duo Push, install the Duo client on your Android or iOS device. Follow the instructions provided during the install at Play Store or iTunes. Login to your mobile client using your Duo account credentials.
Call Me: Perform phone callback authentication.
Passcode: Log in using a passcode generated with Duo Mobile, received via SMS, generated by your hardware token, or provided by an administrator. To have a new batch of SMS passcodes sent to you click the Send me new codes button. You can then authenticate with one of the newly-delivered passcodes.