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How to setup 2FA On Linux SSH Login

  This is a simple setup guide to enabling Two Factor Authentication (2FA) on Linux SSH login. I this article I wont go deep into setup and issues that I have faced when implementing this. First thing is first Update your system first. I have used Ubuntu 20.04 and it is always up to date. To enable 2FA you need to install google authenticator modules sudo apt install libpam-google-authenticator Configuration for PAM and SSHD Add the the following line to /etc/pam.d/sshd and After adding this line please restart the sshd services.  auth required pam_google_authenticator.so Go to /etc/ssh/sshd_config and check if the following line exist. Default value will be "no" so change it to "yes" to activate.  ChallengeResponseAuthentication yes Configuration for Authenticator In the terminal run google authenticator command It will ask few things to acknowledge by user. Details you can see from the below video. Once this part is done you are ready to use the 2FA in ubuntu. T
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GSM Remote on progress















Finally i got an Siemens C45 mobile phone. when i got it , it was also kind of dead (not functioning well) so i took the PCB and after some cleaning and heat up the fella works fine. I did some changers to the SIM socket location and wired the battery points. Today i tested the battery charging part and it also works fine.
Have to make a small circuit for charging part and DTMF decoding part. The interesting part will be the serial connection between micro controller and the phone by which it can be controlled.

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