This was great to read. Related: Morris also discovered the predictable TCP sequence number bug and described it in his paper in 1985 http://nil.lcs.mit.edu/rtm/papers/117.pdf. Kevin Mitnick describes how he met some Israeli hackers with a working exploit only in only in 1994 (9 years later) in his book "Ghost in the Wires" (chapter 33). I tried to chronicle the events here (including the Jon Postel's RFC that did not specify how the sequence number should be chosen) https://akircanski.github.io/tcp-spoofing