This is super cool! I've only used 2 of them before (tcpdump and identify), not in the context of CTF, just b/c they're useful tools. How do you find out about CTFs? I wouldn't mind giving one a try, esp if there was a walkthrough afterwards so that I could improve (b/c I'm going to be pretty bad at the first several I try).
Actually this one was special, I'm in a hacking group at my university organized by a teacher, and he orchestrated it all alongside a couple of students. I signed in another CTF just today because a friend of mine who is into it told me about it. I guess I heard about most of them from friends, but you can find a bunch of them on the internet too! You can give it a try with hackthissite.org/ which is pretty similar. Also check up writeups! Good luck haha
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