PPTP VPN works from Windows, not Linux

I can't connect to my work's PPTP VPN from Linux. But when I reboot to Windows, it works.

I'm using Ubuntu 16.04 and I try to connect using Network Manager and PPTP plugin.

nmap retus the following opened port information about the VPN server:

PORT     STATE  SERVICE
22/tcp   open   ssh
80/tcp   open   http
113/tcp  open   ident
443/tcp  open   https
1723/tcp closed pptp

As you can see, the port 1723 is closed. And indeed, if I try telnet (suggested by pptp diagnostics docs): Unable to connect to remote host: Connection refused.

So how is it possible Window connection works? And more importantly: how to make Linux works, so I won't have to reboot?

Recent Questions...