https://github.com/hwdsl2/setup-ipsec-vpn

''wget https://git.io/vpnsetup -O vpnsetup.sh && sudo sh vpnsetup.sh''

OR,


''wget https://git.io/vpnsetup -O vpnsetup.sh''

''nano -w vpnsetup.sh''

[Replace with your own values: YOUR_IPSEC_PSK, YOUR_USERNAME and YOUR_PASSWORD]

''sudo sh vpnsetup.sh''