Server Administrators require some drills called “cyber range” to protect their systems from advanced cyber-attacks. We run a community “MINI Hardening”, and host competitions which players harden their own virtual system from Red-Team attacks. We explain how to build our cyber range system with open source tools such as Linux OS, Terraform, Ansible, etc., and share some scenarios from our past competitions.

Collaborative note: https://hackmd.io/@coscup/rkzDCGxVr