Real-World DevOps Project From Start to Finish - Security - SSH Daemon, iptables, SSH Config, LISH Console

The video tutorial covers configuring SSH daemon and firewall settings on a Linode VPS. It begins with setting up a directory structure for tasks, files, and handlers. The instructor demonstrates modifying SSH settings to use a custom port and disallow password logins, emphasizing the use of SSH keys. The tutorial then moves to configuring iptables rules to enhance security, including setting policies and allowing specific traffic. Handlers are defined to automate service restarts, and an Ansible playbook is run to apply changes. Finally, the video provides troubleshooting tips using the LISH console for recovery if access is lost.

What is the significance of using SSH keys only?

What steps are involved in applying the changes made to the iptables rules?

What should you do if you accidentally cut yourself off from your VPS?