Take a moment to review this brief (43-second) video that provides a basic explanation of multi-factor authentication, and how it works with Duo: https://www.youtube.com/watch?v=rv12VryxlcE
Multi-Factor Authentication (MFA), sometimes referred to as two-factor authentication or 2FA, is a security enhancement that allows you to present two pieces of evidence – your credentials – when logging in to an account. In brief, MFA requires both a password and a code generated by an authenticator (a security token or smartphone) possessed by the user.
An example of MFA is when you are logged into a website that sent a numeric code to your phone, which you then entered to gain access to your account. (Read more about MFA at nist.gov or guide.duo.com)
ASI has used Duo (a subsidiary of Cisco) successfully to deploy MFA for all ASI staff access to our hosting environment, and we will continue to use Duo as the MFA vendor for all remote access to any server in ASI’s hosting environment. More information about Duo and MFA can be found at https://duo.com/.