In this lab, you will configure security and permissions in an Ubuntu Linux environment, perform a port scan of a Linux server, edit the /etc/ssh/sshd_config file to secure SSH access, create an administrative user, create additional groups and add users to the groups, edit the /etc/hosts.allow and the /etc/hosts.deny files to increase security on the Linux server, and use Nmap to verify that the TCP port has been successfully changed. Note: Once you begin a challenge you will not be able to pause, save, or return to your progress. Please ensure you have set aside enough time to complete the challenge before you start.
Learning Objectives
In this lab, you will configure security and permissions in an Ubuntu Linux environment, perform a port scan of a Linux server, edit the /etc/ssh/sshd_config file to secure SSH access, create an administrative user, create additional groups and add users to the groups, edit the /etc/hosts.allow and the /etc/hosts.deny files to increase security on the Linux server, and use Nmap to verify that the TCP port has been successfully changed. Note: Once you begin a challenge you will not be able to pause, save, or return to your progress. Please ensure you have set aside enough time to complete the challenge before you start.