UDP hole Punching?

1) Yes, with most reasonable firewalls, unless you configure it in extremely paranoid mode.

1) Yes. However, you don't need hole punching if you're contacting a non-NATted server. Your client application just behaves normally.

UDP hole punching is a complex topic, and many attempts have been made to find a solution that works. The problem is that there are so many different NAT routers out there, and there is no standard way of implementing NAT, so all routers behave a bit different.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.