Why Does My Login Fail After I Enable 2FA?

The login failed probably because file configurations or the login mode was incorrect.

Correcting File Configurations

Check whether the configuration file is correct.

Configuration file path: /etc/ssh/sshd_config

Configuration items:

PermitEmptyPasswords no

UsePAM yes

ChallengeResponseAuthentication yes

If you use the root account for login, the following configuration item is required:

PermitRootLogin yes

Correcting the Login Mode

If you attempted to log in in either of the following ways, your login would fail.

Used CloudShell to log in to an ECS.
Attempted to log in to a Linux server through a CBH instance.

Failure cause: 2FA is implemented through a built-in module, which cannot be displayed if you log in in the preceding ways. As a result, the login authentication fails.

Solution: Perform login authentication by referring to How Do I Use 2FA?

Parent topic: Security Configurations

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