http://www.tinc-vpn.org/ https://www.freelan.org/ http://meshbird.com/ https://github.com/dswd/vpncloud.rs https://homputersecurity.com/2018/05/09/mise-en-place-dun-vpn-l2tp-ipsec-avec-softether/
https://www.stunnel.org/index.html http://www.tarsnap.com/spiped.html
