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Basic Authentication


This site provides you with the information necessary to gain access to our cluster. The most important prerequisite is that your project manager adds you to her project. If in doubt, read this paragraph first.

The authentication process on MOGON is to ensure best possible protections again malicious intend. Here you can find the instructions for the general procedure.

Quick Start

  1. Generate your SSH-Keys in Windows or Linux/macOS.
  2. Add your public SSH-Keys in OpenSSH Format to your ZDV Account.
    • HPCGATE and HPCLOGIN must be included in the comment.
  3. Prepare your Smartphone for 2FA by installing the freeOTP or PrivacyIDEA app.
  4. Contact the HPC-Group via with your ZDV Account
  5. Complete the PrivacyIdea process with an HPC-Admin
  6. Login to MOGON via SSH using our Jump Host
Open with a browser of your choice. Use your ZDV credentials for login.

You will now have to submit an SSH-Key whose comment includes certain strings and formatting. To save an individual key in your university account, just copy its public part ( in the designated field click on SSH-Key speichern.

Generate SSH-Keys for MOGON

Please follow our instructions for generating SSH-Keys using Windows or Linux/macOS.

Generating the SSH-Key in advanced way

The SSH-Keys generated by ssh-keygen have the following form:
<algorithm> <key> <comment>

If you want to generate the key in a way that is different from our guide, please notice that you must append the strings HPCGATE and HPCLOGIN, separated by comma as a comment to the key (you may also add your own optional comment). The first keyword (HPCGATE) ensures that you can tunnel through our jump host hpcgate, the other keyword (HPCLOGIN) allows you to access the MOGON login nodes. The keywords must be entered to the comment section of your SSH-Key.


If you have generated your SSH-Keys with PuTTYgen or MobaKeyGen, please note this Article before you upload our SSH-Keys!

Access to MOGON is now done via two-factor authentication through PrivacyIdea. The procedure with PrivacyIdea will be explained in detail later. At this point it is only relevant that you install a two-factor authentication app on your smartphone that has been approved by the HPC group.

We only support the apps mentioned above. Other apps may not be able to function properly, so you will not be able to log in to MOGON using the second factor. If you nevertheless decide to use another app, please make sure that sha-512 is supported. Please also note that in this case we can not provide support if you experience problems.
  • Once you have set up your SSH-Keys and freeOTP or PrivacyIDEA on your smartphone, please contact us via the ticket system using your ZDV account 1) and arrange a meeting with us.
  • We will contact you via Skype for Business which is available to all university members or we can arrange a video chat via BigBlueButton, if Skype for Business is not available for you.
  • The whole process should take no longer than 10 minutes, if your SSH-Keys are properly setup.
Information about Skype for Business and BigBlueButton can be found on this Article from the ZDV.

Virtual Private Network

is necessary to access If you have not yet set up VPN on your PC, please follow these instruction from the ZDV
  1. Have your smartphone with freeOTP or PrivacyIDEA app installed ready.
  2. Browse to PrivacyIdea and get ready for the login. Browser extensions, such as uBlock, uMatrix and NoScript, probably will prevent the website from functioning properly.
  3. This website is only accessible within the campus network. You can reach it from outside via VPN or with a remote desktop session. Please make sure you can open the page before proceeding.
  4. Establish contact with the HPC Group.
  5. For the login you need your username and the registration key. The registration key serves as a password for the login to PrivacyIdea and is handed to you by the HPC-Admin during the identity verification process.
  6. After successful login, click Token ausrollen in the menu on the left side.
  7. On the page Token ausrollen select TOTP: Zeitbasiertes Einmalpasswort as token. Do not change OTP-Länge and Zeitschritt. Fill in the field Beschreibung and click on Token ausrollen at the bottom of the page.
  8. Scan the QR-Code on your screen with the 2FA app of your choice on your smartphone.
    Do not share the QR-Code with anyone. Employees of the HPC group will never ask you for your QR-Code or other login credentials.
    Do not scan the QR-Code shown below!
  9. The newly created token is initially deactivated and must be activated by an HPC-Admin.
  10. Inform the HPC-Admin of the successful creation of the token, so that he can activate it. As soon as the token has been activated by the HPC-Admin, you can see the status at the Alle Token page.
  11. Done. You should be able to use the 2FA app of your choice to create new TOTPs as necessary for login to MOGON.

send an E-Mail to (which will create a new ticket in our ticketing system)
  • start/mogon_cluster/basic_authentication.1611834187.txt.gz
  • Last modified: 2021/01/28 12:43
  • by meesters