How to attack and bypass the firewall?

Question

firewall

Hello. Please tell me, sites or books where you can read about attacks and ways to bypass the firewall.
Do not think anything, I am for purely informational purposes and writing a term paper.

Answer 1

Look, maybe they already posted it here - https://www.youtube.com/user/PentestITLab
It seems that they had something about it on the course, though I bought it so I don’t know if this video is there.
Otherwise, look for CEH from a specialist