N2N protocol version There are four popular versions of the n2n project
Version v1 developed by ntop.org, not being updated. Project address：https://github.com/switch-iot/n2n_meyerd/v1
Version v2s developed by meyerd, not being updated. Project address：https://github.com/switch-iot/n2n_meyerd/v2s
Version v2 developed by ntop.org, been sealed. Project address：https://github.com/ntop/n2n/v2.8_r540
Version v3 developed by ntop.org, in updating. Project address：https://github.com/ntop/n2n
Gon2n v0.2.1 developed by pojntfx Project address：https://github.com/pojntfx/gon2n