ZT Firewall code Reprise

Here is my original post:

So nearly two years later I am think about having another go with ZT Firewall.

I have wondered whether the attempted simplification is really that.

Please do let me know if we have useful editing enhancements. I’m off to find the manual linked in my original, by michal I think (hope you are well).
Regards to all
Anthony

Here the link Protocol Design Whitepaper | ZeroTier Documentation

And
https://www.zerotier.com/2016/08/31/capability-based-security-for-virtual-networks/

And

And finally

Just trying to catch up with myself