[CentOS] ultrasecure sshd server

[Eero Volotinen]

2011/6/10 Nicolas Ross <rossnick-lists at cybercat.ca>:
>> How to configure sshd to required both ssh public key and user
>> password also? yes, stupid, but required on my setup..
>
> If you want 2 factor authentication, you can add yubikeys. They are little
> usb dongle that provides one-time-password. And the server-side for those is
> open-source if you don't want to use their authentication servers. And they
> are relatively cheap.
>
> We use these here on our border servers to increase security.

is this easy to ingrate with openssh server on centos 5.x ?

--
Eero