Back when I was studying for a cybersecurity course, I had the pleasure of reading a few posts on the Cloudflare blog. There are about 88 pages(!) of blogs at blog.cloudflare.com

A few recent ones might pique your curiosity

https://blog.cloudflare.com/on-the-recent-http-2-dos-attacks...

https://blog.cloudflare.com/a-gentle-introduction-to-linux-k...

https://blog.cloudflare.com/the-deep-dive-into-how-verizon-a...