Configuring PAM Authenticator for logging in via Password

1. Download the PAM.So file from https://authnull.com/downloads.

2. The above step would have generated pam_authenticator.so in this location /usr/local/lib/security/pam_authenticator.so

3. For Password authentication, Please add the below lines to /etc/pam.d/common-auth

    auth required /usr/local/lib/security/pam_authenticator.so 
    auth required pam_permit.so
   

4. Now login to the VM using su

        su tempadminmfa
   

   i. Please enter the password for user tempadminmfa

   ii. DID Authentication will initiate → please check / var/log/auth.log

   iii.Once the authentication completes, the user can be logged in.

   iv. In case of failure, the authentication denies.