I have a Tomoato router which is running a PPTP server. I was able to connect via my ubuntu machine and my phone.
I bought a VPN service which used Openvpn (private Internet access) and followed their instructions on (https://www.privateinternetaccess.com/pages/client-support/#ubuntu_openvpn_installer)
After installing, I am able to connect to their openvpn's but i can't connect to my own PPTP server.
I can still connect with my phone to the router PPTP server.
Please help. Thanks.