pam-google-authenticator

imported from https://code.google.com/p/google-authenticator/

features added in this repository

RHOST_WHITELIST option

A list of hosts to your user configuration file, from which the validation code will never be asked (trusted hosts)

AUTH_CACHE option

Add this option to the user configuration file to only enter a validation code only once in a time period from the same host (temporary trusted host)

quick install guide for debian/ubuntu openssh

cd libpam
make
make test
make install

edit these files :

• /etc/ssh/sshd_config

    ChallengeResponseAuthentication yes
  

• /etc/pam.d/sshd (under @common-auth)

    auth required pam_google_authenticator.so nullok noskewadj