PPTP Setup on Fedora 21 (kernel 3.19.3-200.fc21.x86_64)

I have just updated my laptop to fedora 21 OS.
And had faced with the problem when trying to connect my office VPN (via point to point tunneling protocol – PPTP) with this error message “connection process ends with timeout”.
If you have the same issue, type command below :

if you want to load nf_conntrack_pptp module automatically when your lap start up, type these commands:

You should change nf_conntrack_pptp.conf permisson to 771 if you have file permission error with the second command.

Reference link: