This is an old revision of the document!
Two-factor authentication is mandatory to gain shell access to our SSH server styx.lorentz.leidenuniv.nl unless you have set up a public/private key SSH authentication for your account. In this latter case, your access will continue to be passwordless.
If no public/private key authentication is set up for your account, you will have to complete the extra 2FA step to gain access to the system.