How to Set Up Two-Factor Authentication on Raspberry Pi – Guide
Two-factor authentication is an additional layer of protection that can be added to your accounts. This second factor is based on something you have, like a smartphone, or something you are. For example, if you are a doctor, you might use a two-factor authentication code to log in to your account.
To run a Raspberry Pi headless, you need to use a second factor to protect it. Many people use their smartphones as the second factor to protect their Raspberry Pi. This became quite common with the introduction of the Raspberry Pi 4, which has USB 3 and Gigabit Ethernet. However, when defining up this type of server, you often want to run it “headless”. without monitor, keyboard or mouse. ..
To enable SSH for your Raspberry Pi, you will need to follow these steps:
- First, make sure that you have SSH enabled on your computer. This can be done by going to the command prompt and typing “ssh” into the text box.
- Next, you will need to create a new SSH keypair. To do this, type “ssh-keygen” into the text box and hit enter.
- Once you have created your keypair, you will need to copy it to your Raspberry Pi. To do this, type “cp /etc/ssh/id_rsa ~/.ssh/id_rsa” into the text box and hit enter.
- Finally, you will need to add the keypair to your Raspberry Pi’s authorized_keys file. To do this, type “sudo nano /etc/ssh/authorized_keys” and paste in the following content: id_rsa = “00:30:00:00:00:01” id_rsa2 = “02:30:00:00:00:01”
How to To define Up Two-Factor Authentication on a Raspberry Pi
Update your Pi
sudo apt-get update This will check for any updates to the software on your Raspberry Pi. If there are any, they will be downloaded and installed. If you have not updated your software in a while, you may find that some of the packages have been upgraded or new versions have been released. In this case, it is best to install these updates by typing the following command: sudo apt-get upgrade ..
sudo apt update && sudo apt -y upgrade
enable SSH
ssh -i /etc/ssh/sshd_config
ssh -l 2>&1
sudo systemctl enable ssh
This command starts the SSH daemon. ..
Require ID authentication, with challenge-response
sshconfig This will open the SSH configuration file in a new window. Scroll down to the bottom of the file and enter the following line into the text field: ChallengeResponsePasswordAuthentication yes
restart ssh daemon
ssh -R “yes” “sshd_config”
sudo systemctl restart ssh
ssh -i /etc/ssh/config pi If you can still connect to your Raspberry Pi over SSH, then you can continue using the same configuration. If not, then you will need to make some changes to your SSH configuration in order to connect.
To return the IP address you need to use, change to your laptop or computer, launch a Terminal and connect to your Raspberry Pi. Make sure to replace “10.3.000.0” with your unique IP address:
Context Up Two-factor authentication
To generate a one-time authentication code, you will need the Authenticator app. There are several options available, but I am using Google Authenticator for this tutorial. The app is available on iOS and Android.
sudo apt-get install google-authenticator-pam
This will install the Google Authenticator library, which can be used to authenticate with Google accounts. ..
Google Authenticator is a free app that can be installed on your mobile device and Raspberry Pi. Once installed, you can use it to set up two-factor authentication. This will help protect your account from unauthorized access. ..
Create a connection: linking your Pi to yours mobile device
sudo raspi-config Under “Interfacing Options” select “Scanners and Cameras” and then under “QR Code Scanner” select “Enable”. Next, open your mobile app and scan the QR code. ..
If you want to generate time-based authentication tokens, the Raspberry Pi will ask if you want to use time-constrained tokens. Time-constrained tokens are more secure, but they may not be convenient if you need to quickly access your account. The Terminal will generate a QR code, although you may need to resize the Terminal to see the full barcode. ..
Raspberry Pi emergency codes
- 0007 – power off
- 0008 – reset
- 0004 – reboot
- 0001 – system crash
- 0002 – suspend/resume
- 0004 – reset GPIOs
The Google Authenticator app is a secure app that helps you keep your personal information safe. It authenticates your phone or tablet so you can easily access your account and sign in.
In the lower right corner, tap the “+” sign.
Scan a QR barcode to access the camera.
To use the QR code scanner, hold your device camera up to your monitor and position it over the QR code. As soon as your smartphone or tablet recognizes the QR code, it will create an account and start generating authentication codes automatically. ..
Go back to your Raspberry Pi and update your “google_authenticator” file. Press the “Y” key on your keyboard. ..
If you want to prevent multiple people from using the same auth token, please press the Y key on your keyboard.
If you want to increase the time bypass window, press “N” to help protect yourself from brute force attacks. ..
The company will now prompt you to enable rate limiting, which will restrict you (and potential hackers!) to three login attempts every 30 seconds. Rate limiting can help protect you from brute force and other password-based attacks, so you should choose “Yes” unless you have a specific reason not to.
Final note
This guide will show you how to set up two-factor authentication on a Raspberry Pi. This is a great way to protect your account from unauthorized access. ..
