This tutorial explains how simple it is to setup a PPTP VPN connection on Debian 8 Gnome Desktop.
Install PPTP VPN Client On Debian 8 Gnome
Open a terminal window and run this command to install PPTP VPN client.
sudo apt-get install pptp-linux network-manager-pptp network-manager-pptp-gnome
Configure PPTP VPN Connection
Once the client is installed, log out of your system and log back in.
Open Gnome settings panel. Click Network icon.
In the network settings window, click the plus button at the left-bottom to create a new connection.
Select VPN from the list.
Select point to point tunneling protocol.
In the next window, give this VPN connection a name, enter the IP address of your VPN server, enter VPN username and password.
Now click the Advanced button at the bottom-right. This will open up the advanced option window. Check Use Point-to-Point encryption (MPPE), then click OK to save your settings.
Next, click Add button to add this VPN connection.
Now click the network icon at the task bar and you will be able to connect to your VPN server.