Cybersecurity training in control systems using real equipment * *This work was supported by the Spanish Secretary of State for Research, Development and Innovation (Ministry of Economy and Competitivity), under grant UNLE13-3E-1578 of the National Programme for Fostering Excellence in Scientific and Technical Research -FEDER funds, and by the Spanish National Cybersecurity Institute (INCIBE), through the 17th Addendum of the Framework Agreement between INCIBE and the University of León