We will learn how to secure ssh connections to Linux servers by configuring multi-factor authentication or two-factor authentication. In this we install and configure libpam-google-authenticator with pam and sshd. Once you attach your phone with the server, you need to install google-authenticator application in your phone for this. Everytime you try to do ssh to secure server, apart from password you will also be asked for verification code, which is a 6 digit number, time bound, which comes on your phone to verify the user. This is a additional level of security for your Linux servers.
Timeline:
00:00 Introduction to ssh authentication methods
00:52 Introduction to ssh multi-factor authentication
01:45 Configuring ssh multi-factor authentication
