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== Issues ==
DUO 2FA has a number of disadvantages and issues. To list a few:
* A cellphone, compatible tablet, or landline is '''mandatory''' to for enrollment in 2FA
* U2F is exclusively supported in the Chrome and [[Chromium]] browsers, despite the presence of a [https://github.com/prefiks/u2f4moz functional plugin] which provides the feature in [[Firefox]]
** A workaround for Firefox has been posted [[Yubikey#Using_with_Virginia_Tech_2-Factor_(Duo)|here]].
