How can I configure OpenSSH (5.9) to reject a given set of public keys?
I know I can remove the keys from each respective
.ssh/authorized_keys file, but I would like to do it on a server-wide basis. Imagine a scenario where a private key got compromised and I would like to prevent any user from putting the respective public key into their
authorized_keys (yes, they should still be allowed to edit theirs) and it working. To achieve that I will need something that works at the system level.