https://github.com/slackhq/nebula
https://github.com/DefinedNet/mobile_nebula

Nebula is a scalable overlay networking tool with a focus on performance, simplicity and security. It lets you seamlessly connect computers anywhere in the world. Nebula is portable, and runs on Linux, OSX, Windows, iOS, and Android. It can be used to connect a small number of computers, but is also able to connect tens of thousands of computers.

Configure Nebula VPN on iOS/Android
https://willhbr.net/2021/06/22/configure-nebula-vpn-on-ios-android/

VPN mesh with Nebula
https://linuxblog.xyz/posts/slack-nebula/

在debian中安装 nebula-lighthouse-service 灯塔服务

UDP/noiseprotocol协议