1) Connect to VPN
In order for a VPN PPTP connection to work, you must do the following:
1) Edit /etc/ufw/before.rules
2) Add the following lines before segment # drop INVALID packets …
# gre
-A ufw-before-input -p 47 -j ACCEPT
-A ufw-before-output -p 47 -j ACCEPT
3) Save file
4) Restart ufw:
sudo ufw disable
sudo ufw enable
Credit goes to: https://www.itprotoday.com/.../which-ports-do-you-need...
Now, a VPN client can be created from Network menu
