[CentOS] ultrasecure sshd server

Am 10.06.2011 um 00:02 schrieb Eero Volotinen:

>
> Well, some say that it's possible with pam hacks.
>
> main problem is that openssh public key does not contains expiry
> information (is not possible to expire public keys).
> it migth be possible with openssh certificates?



As I understand it (following the arstechnica link, then using the  
RequiredAuthentication keyword as a new search term) -
it's only impossible with openssh.