My ISP provides me an access to the internet via PPTP. I need to use 3rd party VPN service to access to some resources. The problem is that when I press on 3rd party VPN connection, its shutting down my ISP's VPN.
So I have two questions: 1. If this possible to do with Network Manager. 2. If this possible at all.

P.S. I can provide logs\configs if you need