I guess there are several ways to reproduce the freeze, in my case it is most definitely tied to the firewall since I get it 100% of the times I forget to manually switch it off before running the game, and never had it occur when I remember to do so.
Had the same issue before 0.42 as well, so the update didn't affect it in any way on my side. Other than this problem, the game runs smoothly as long as the firewall is switched off and I have a lot less lag and bug issues than the friends I play with in general.

Obviously the firewall is not allowing access properly. But the point of this bug report is that DayZ in this instance freezes in a way that not even stopping the process works to shut it down completely as it occurs. So there is definitely an issue related to the game stability when dealing with a firewall.