FreeIPA vs Monotp

FreeIPA is an integrated Identity and Authentication solution for Linux/UNIX networked environments. A FreeIPA server provides centralized authentication, authorization and account information by storing data about user, groups, hosts and other objects necessary to manage the security aspects of a network of computers.

It converts your passive OTP process to active push notification. It works like magic! When you use it's Chrome Extension, it will identify your visited website's OTP request and will send it to your mobile phone as a push notification. When you Accept that request on your phone, your code will be generated on your mobile phone and send it back to the Chrome Extension. That extension will put your OTP code to the OTP text box and will redirect you to the application automatically.