I'm planning to move to ubuntu from windows, but I don't know how to configure VPN in ubuntu.
On windows, the VPN provider has provided a GUI application, I just need to input my username and password, then choose a server in a list, everything is done.
But I input the same information into ubuntu, in the following dialog:
But it can't connect to server, the error message is:
(PS: I'm running the ubuntu in Virual-Box with default settings, and the type should be PPTP)
How to configure it correctly?