I was looking for a solution and finally found,I have to run in terminal:
sudo modprobe nf_conntrack_pptp
I don't know what it is, what this command is doing, I know only that i have to run this command every time to keep VPN working on my Lubuntu 14.10.
Anyone can help why I have to run this command every time?
And why I have to do it when I've configured VPN properly?
modprobeis successful, sonohupdoesn't repeat after a single success. – Victor Sergienko May 14 '15 at 09:32