Was about to post this as well. I think these two articles are also a great launch point before diving into the whole stack: - https://apenwarr.ca/log/2017081

Was about to post this as well. I think these two articles are also a great launch point before diving into the whole stack: - https://apenwarr.ca/log/20170810 https://apenwarr.ca/log/20170810 The World in Which IPv6 was a good design (which is actually a mini CS history course on networking in disguise) - https://tailscale.com/blog/how-nat-traversal-works/ https://tailscale.com/blog/how-nat-traversal-works/