Fedora infrastructure has setup to use two factor authenication for all 'sudo' access on any machines. At some point in time it may be expanded for other access, but currently it's restricted to just 'sudo' calls on infrastructure machines.
You need to know about this if you are in a FAS group that provides you shell access to any infrastructure machines, and additionally you have permissions / need to sudo on those machines.
Currently we support two backend tokens:
1. yubikey - You setup this as noted on the yubikey burn page.
2. googleauthenticator - You can install a free application from google to your iphone or android device to use this option.
If you do not have a yubikey or a android or iphone device, please contact us for options.