[RnD] NAT Traversal

[teon]

To research

• Our current implementation:

https://git.teonite.net/defguard/client

• Ideas

https://blog.ipfs.tech/2022-01-20-libp2p-hole-punching/

https://docs.rs/libp2p/latest/libp2p/tutorials/hole_punching/index.html

https://tailscale.com/blog/how-nat-traversal-works/

Result:

1. Which technology to use for mesh networking with NAT traversal (no public IP)
2. How to implement site2site (we only have roadwarrior now)