Generating self signed certificate for testing nginx via vagrant vm
Author of PuPHPet here.
I'm actually trying to solve this issue within PuPHPet itself :)
The problem is that the self-signed cert would be generated each time you $ vagrant up a new instance. I don't know what kind of warnings your browser would throw at you, but I'm certainly willing to try.
Follow me on twitter @juantreminio and I'll make sure to spam all my followers when the feature has been added!