2. We have rigidly defined areas of doubt and uncertainty:) (tester needed)

Have you ever tried to test a firewall software on one machine with one or zero network card? Would you like to setup such a test scheme in a reproducible manner?

No, it is not impossible, just moderately hard. You can start it in many ways: with output chains in the nat ipfilter table, with UML domains, or many other ways.

If you like such challenges, you can live for them with our project.