Comment by fsiefken

nat traversal more or less solved:

https://docs.iroh.computer/concepts/nat-traversal

https://www.iroh.computer/blog/what-is-derp

https://ark-builders.medium.com/the-deceptive-complexity-of-...

projects using iroh:

https://github.com/muhamadjawdatsalemalakoum/kith

https://delta.chat/

https://github.com/fishfolk/bones/