Enabling two-factor authentication with SMS2 (free) and NetScaler Gateway

In this post we are going to see something fabulous, let's see how to enable 2FA or two-factor authentication in NetScaler Gateway, forcing users to use an additional Token for corporate access to the organization. We will use SMS2 which is a free tool, which through RADIUS will validate the user tokens, we'll use software tokens using the Google Authenticator app on mobile, A blast!