Google Authenticator has a PAM module. I haven't tried it but I know it's available for several Linux distros. I'm not sure how difficult it would be to port to OI.

http://www.tecmint.com/ssh-two-factor-authentication/

On 07/01/2015 02:53 PM, David Brodbeck wrote:
On Wed, Jul 1, 2015 at 3:15 AM, Jim Klimov <jimkli...@cos.ru> wrote:

You can also boost security with no passwords allowed, keys only for ssh
auth ;)

True.  I do this with machines where I'm the only one who'll be logging
in.  With machines that have lots of other users it becomes too much of an
administrative hassle to distribute keys.

Does anyone know of a 2-factor auth system for SSH?  Being able to use
something like Google Authenticator would be nice.



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