[CentOS] 2way authentication for SSH?

[Robert Moskowitz]

On 01/28/2013 02:51 AM, Rudi Ahlers wrote:
> Hi,
>
> Does anyone know of a stable / working "2way authentication" system for
> SSH, and even web authentication services?
>
> Most of the banks in South Africa have a system that, when you want to make
> a payment, they send you an SMS and you need to verify the action with a
> secret code which was SMS'd to you. gmail also has this.
>
> Does anyone know of a "universal" plugin / application that can be used
> with SSH and even websites like Wordpress / Joolma / Webmin / etc?
>
>
> Any pointer would be appreciated.

As you can see by the responses, there is no 'universal' plugin. The 
whole arena of authentication is plagued with bootstrapping challenges, 
security flaws, and complexity (like JSON).

I am the author of one of the alternatives (HIP), and my recommendation 
is just choose your poison.