Indeed. Looking at the descriptions of the attacks all these are simple. They probably would have occurred to any halfway competent attacker looking at ways to DOS your sever in the first several hours of playing around with it.

Consider that one of the attacks is described as a "ping flood", remember when we first dealt with that? Decades ago. And the "data dribble" looks like a re-heated version of the HTTP "Slowloris" attack.

It's extremely regrettable that the creators of the vulnerable software didn't take a look at any of the plethora of existing attacks and imagine how they might be adapted to attack their implementations.