Synology Community
https://community.synology.com/enu/forum/17/post/5564116.04.2014 · Before setting up 2 factor authentication, enable ssh and confirm that you can log in as admin and root (same password as admin) Then use either of the options below to enable 2 factor authentication. NB: option 2 can be used to manually recover/generate new codes. 1) Using gui to enable 2 factor authentication.