Two Factor Authentification enabled - No login possible

[drdemo]

Hi,

I followed this tutorial to enable 2FA on my server. I followed the tutorial on the root user, as I wanted the root user only to get secures via 2FA. As I wanted to relogin and try out if everything worked, it said Access Denied after entering my password. I have tried it now many times, everytime it gives me an Access Denied. I saved the emergency scratch codes. How do I gain access again?

Thanks.

[EuclideanCoffee]

Did you add the secret key to the authentication application? You should be prompted for a challenge. Be sure you have Internet connection.

[drdemo]

Yes it's added, I see new codes generated every few seconds.

[EuclideanCoffee]

You're logging into SSH or local (TTY/GMD)?

[drdemo]

Ssh

[EuclideanCoffee]

Can you log in locally without ssh? I'm afraid you aren't receiving the prompt.

Edit: Have you tried a reboot?

[drdemo]

I can reboot the server tonight, however I was hoping to find a solution without a reboot.
The server is being rent from an dedicated server company, which has remove login only. Unfortunatelly, don't have the option to login locally.

[EuclideanCoffee]

I'm hoping that the reboot would restart openssh-server and enable the challenge prompt. If not, you may need to login locally. Wishing you the best.

[jmginer]

Maybe you can ask your provider for a KVM-IP connection.

[kevdog]

Just restart the openssh service and see what happens and possibly the PAM daemon. And just a "dad" type I hope you learned your lesson warning - "When enabling security measures on live systems that have the potential of locking you out completely, its probably best to try this approach on a test system first rather than initially on the production system". I hope you get the system working and good luck to you.