Re: 2 factor authentication

[MaddHatter <maddhatt+securitybasics () cat pdx edu>]

> Can someone provide any information/links on how to implement 2 factor
> authentication with ssh? Do I need any extra software? Is there any open
> source tool that can help?
>
> Thank you in advance.


You mean like requiring both a password and a key before a user is logged
in? This is possible on most SSH servers, but naturally configuration is
specific to whatever ssh server you're running. (Unfortunately, I think
OpenSSH is not one of the servers that supports requiring both a key and
a password without PAM or source modification. Someone please correct me 
if I'm mistaken.)

There's lots of other two-factor approaches (RSA devices seem popular, 
though expensive), but a password + a key is cheap and effective.