The team at UMBC put on a great CTF over the Easter weekend of 2020. This CTF has a set of problems that you don’t see too often. Many times groups will have you do RECON type challenges over the Internet, but the UMBC Cyber Dawgs created their own internet for us to use for these challenges.
Check out my full solve for all five challenges here: https://www.wclaymoody.com/blog/dawgctf-impossible-pentest