pptpd in 16.04: can't establish the connection

Question

I can install pptpd in 14.04 using this short (9 steps) script: https://github.com/MdNor/digital-ocean-pptp-vpn/blob/master/ubuntu

But it doesn't work in 16.04: Windows client prints that it can't establish the connection.

What step should be added for 16.04?

Answer 1

It's not Ubuntu 16.04 - even if you had a slightly newer kernel set in 14.04 it would do this. See workaround here which involves turning on nf_conntrack_pptp kernel module.