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froslan
Staff
froslan
Staff
February 25, 2026

Troubleshooting Tip: FortiSIEM GUI login fails when using RADIUS 2FA with FortiToken

  • February 25, 2026
  • 0 replies
  • 64 views
Description

This article describes the configuration of two-factor authentication (2FA) for FortiSIEM GUI login via RADIUS using FortiToken.

In this scenario, users are unable to log in to the FortiSIEM GUI and receive the error message 'Invalid username and password', even though the credentials are correct and the FortiToken one-time password (OTP) is successfully generated and delivered.
Scope FortiSIEM, FortiAuthenticator.
Solution

To configure two-factor authentication (2FA) for FortiSIEM GUI login via RADIUS using FortiToken, follow the steps below:

  1. Navigate to CMDB -> User in FortiSIEM and create a user account.

  2. Configure FortiAuthenticator as a RADIUS server and enable 2FA authentication using FortiToken.

  3. When logging in to the FortiSIEM GUI, enter the username in the following format: username@domain.xyz

  4. In the Password field, concatenate the user's password with the current FortiToken OTP and enter it as a single string.
    Example: testpass123456 where 123456 is the current FortiToken one-time password.
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