![]() It is important to save your recovery codes in a safe place such as in a password manager app. These codes can be used if you somehow lose access to your app (for example, if you lose or replace your phone). When you set up TOTP on your Gandi account we will provide you with a set of recovery codes. At the bottom of this page you can find a list of free authenticator apps and programs you can use. Setting up TOTP requires a TOTP authenticator app or device. ![]() Each code is valid for 30 seconds, after which a new code will automatically be generated. The codes are generated based on the key we provided when you linked your authenticator app with Gandi and the precise time you are logging in. After the accounts are linked, you provide code from this app into every time you log into your Gandi account. TOTP stands for “time-based one-time password algorithm.” To use TOTP you will link the TOTP authenticator app on your phone or computer to your Gandi account. You can also see if members of your team have activated two-factor identification by :ref:`looking at your sharing settings`_. You will only need to provide one of the authentication methods to enter your account. If you don’t have your security key available you will then be asked to provide a TOTP code. When you log in you will be asked for your security key first. You can activate both security keys and TOTP at the same time to have the option of using either method. You can read more about security keys here. When you activate two-factor authentication on your Gandi account you will provide both your regular password and additional code generated either from a TOTP authenticator app, usually on your mobile device (TOTP), or from a USB device you plug into your computer (security key). After login to the Selfservice portal, just choose " Incident: I have login problems" from the drop-down list and continue.Two-factor authentication refers to the security practice of requiring two different types of verification to prove your identity. Check the FAQ section for possible solutions.If you have any questions or problems regarding 2FA on Linux Cluster login nodes, we kindly ask you to. Automatic (data transfer) workflows between your local computer and the login node may no longer work! Please Contact Us and report issues. The introduction of two-factor authentication will have impact on the procedure of accessing the Linux Cluster. Rather, it will ask you for a second factor on top of the conventional login credentials. This documentation will guide you through these steps. 2FA will not replace the conventional ssh method with password or public key. Tokens for 2-factor authentication must first be registered on the SIM-MFA web portal at LRZ before they can be used for authentication on a LRZ service. ![]() A "token" is a piece of hardware or software that serves as a second factor in authentication. In order to use 2FA on the Linux Cluster, you need to configure it in advance! That procedure comprises two steps: Registration of the token(s) at LRZ SIM-MFA portal and c onfiguration on your local device. For all users the Linux Cluster is only accessible with 2FA. In order to improve the security of our HPC systems, we have changed the authentication procedure on all login nodes to two-factor authentication (2FA) as of July 11, 2023. In view of increasing security risks, we are forced to strengthen the security measures. Two-Factor Authentication is enabled on all Linux Cluster login nodes! 2.
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