[CentOS] 2way authentication for SSH?

>
>
> Thank you Alexander.
>
> Do you know of any such product which doesn't need LDAP? I've never worked
> with LDAP and don't really want to spend time to learn it now.
>


Would require a bit of work to make it 'universal' but for anything that
can use PAM there's google authenticator...

http://www.howtogeek.com/121650/how-to-secure-ssh-with-google-authenticators-two-factor-authentication/