Amazon EC2
Allow the following through the firewall ("security group")
- ICMP (all)
- TCP port 22 (SSH)
- TCP port 1723 1701
See the screenshot of the rules from EC2 www console at https://github.com/viljoviitanen/setup-simple-pptp-vpn/wiki/Amazon-EC2-firewall-security-group-instructions
Common
wget https://raw.github.com/viljoviitanen/setup-simple-pptp-vpn/master/setup.sh
sudo sh setup.sh
sudo nano /etc/sysctl.conf
net.ipv4.ip_forward = 1
iptables -t nat -A POSTROUTING -o enp0s3 -j MASQUERADE && iptables-save
Let the script run. Take note if the server external ip address detection is succesful.
Get your computer to use the VPN. Try googling for instructions, e.g. https://www.google.com/#q=setup+pptp+windows+8
Note: at least on Ubuntu Desktops and probably other Linuxes as well, you need to enable MPPE encryption from advanced settings!
Enjoy your very own (somewhat insecure) VPN!
Some notes
Clients are configured to use Google public dns servers when the vpn connection is active: https://developers.google.com/speed/public-dns/
Only one vpn account is generated. To add more accounts, see the file /etc/ppp/chap-secrets
If you keep the vpn server generated with this script on the internet for a long time (days or more), consider either restricting access to the ssh port on the server by ip addresses to the networks you use, if you know the addresses you are most likely to use or at least change ssh from port 22 to a random port.
You can also specify you own username and password, run sh setup.sh -h for help.