DDoS BootCamp: https://www.ddosbootcamp.com/
InfoSec Industry: https://www.infosecinstitute.com/topics/information-security...
Learning Tree (might have free access through your local library): https://www.learningtree.com/training-directory/cyber-securi...
and several courses available on Coursera: https://www.coursera.org/learn/it-security