- Lab
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Libraries: If you want this lab, consider one of these libraries.
- Cloud
- Security

Configure SSH to Work with Google Authenticator
In this lab, we are required to configure SSH to interact with the Google Authenticator. The server is configured so that it only asks for a password. That needs to be changed after the first usage. Our job is to add this additional authentication step. First, we need to install and initialize the Google authenticator. Then, we need to configure SSH to make use of the authenticator. When everything is set up, make sure to perform a verification that the configuration is valid.

Lab Info
Table of Contents
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Challenge
Configure Key-Based Login
Generate Private/Public Key Pair on the Client
ssh-keygen
Copy the Public Key Over to the Server
- From client:
/Path/to/your/public/key/file
- To server:
/home/cloud_user/.ssh/authorized_keys
- From client:
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Challenge
SSH Configuration
sudo vim /etc/ssh/sshd_config
PubkeyAuthentication yes PasswordAuthentication no AuthenticationMethods publickey,keyboard-interactive
ESC :wq ENTER
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Challenge
Configure the Repository, Then Install and Initialize the Google Authenticator
sudo yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
Install Google Authenticator
sudo yum install google-authenticator
Initialize Google Authenticator
sudo google-authenticator
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Challenge
Further SSH configuration
sudo vim /etc/pam.d/sshd
auth required pam_google_authenticator.so
sudo systemctl restart sshd
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