SSH Configuration Issue Fixed: Local Authorized Keys No Longer Working
Published: 21 Jan 2026 by NEMO Team
SSH Configuration Issue Fixed
We have fixed an SSH configuration issue on the login nodes that unintentionally allowed the use of local SSH keys stored in $HOME/.ssh/authorized_keys files.
What happened?
Due to a misconfiguration of the SSH service on the login nodes, SSH keys stored in your local $HOME/.ssh/authorized_keys file were incorrectly accepted in addition to SSH keys configured through our central authentication system at login.bwidm.de. This behavior was never intended and has now been corrected.
Correct authentication methods
As intended, you can access the cluster using:
- Password + OTP (One-Time Password)
- SSH keys configured in login.bwidm.de
Setting up SSH keys properly
If you need to set up SSH keys for authentication, please follow the official guide:
This guide will walk you through the process of properly configuring your SSH keys in the central authentication system.
Questions or Issues?
If you have questions about SSH authentication or experience any login issues, please submit a ticket.