Can not login via SSH because I changed sshd_config? Can I undo this?

[karla2]

Hi, I changed the sshd_config file and added the challenge_response option for passwordless access via key.

Unfourtanetly I forget to ssh-copy-id my key before.

In my defense: we have a lot of esx servers with the same sounding names.

Can I undo this?

I cannot login anymore because server refuses my key.

We are still using ESX 5.x

[IRIX201110141]

Connect trough remote console like ILO,iDRAC,iRMC  or directly on the server with keyboard and  a monitor.

Regards,
Joerg