What is this shit? Software designed to bypass Deep Packet Inspection systems found in many Internet Service Providers which block access to certain websites.
Let's try to build a chain in the order of "what is based on what".
zapret. Linux version of this project: GoodbyeDPI. Suitable for all countries, but contains some tricks specifically for Russia (to fight russian regulator Roskomnadzor).
PowerTunnel. A proxy+GoodbyeDPI based on a previous project. Written in Java.
Green Tunnel. And again the tunnel. Green this time
SpoofDPI. The last participant of our show. Based on a previous project+GoodbyeDPI. Written in Go.
It is easy to see that the progenitor of these projects is GoodbyeDPI for Windows ( ), authored by ValdikSS, who decided to help Russian Windows users fight the arbitrariness of the local Internet regulator