#NAT is not a security mechanism.
See #pwnat by #SamyKamkar
https://github.com/samyk/pwnat
https://samy.pl/pwnat/
@forthy I know, but they certainly are somewhat trackable...
It would likely require some system from "inside" to traceroute out to known blocked sites and/or trying the reverse...
Kinda like #pwnat by #SamyKamkar works...