The open source peer-to-peer VPN
# apt-get install libssl-dev make git gcc
# git clone https://github.com/Nayar/peervpn
# cd peervpn
# wget https://gist.githubusercontent.com/ThomasLeister/fc65ff8ff37e1825df981633d90f15d8/raw/2f633cb320354b1685abf7ea441e2388dfe3ed89/PeerVPN%2520LibreSSL%2520build
# make
# make install