How to properly set up a VPN on Linux Mint?

Question

linux

Hello!
I can't set up a VPN connection correctly.
It costs Linux Mint, added a VPN connection to Network Manager.
There are internal sites behind the VPN, and when I turn on the VPN, they are visible, but all other Internet sites are not available.

Answer 1

In NM - configure VPN - select what you need - change - on the ipv4 settings tab - routes - add the required network as a gateway, specify the remote ppp address. Check the box - use only for the resources of this network.

ppp0      Link encap:Протокол PPP (Point-to-Point Protocol)  
          inet addr:10.0.0.105  P-t-P:10.128.0.0  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1400  Metric:1
          RX packets:11461 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16757 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3 
          RX bytes:2035618 (2.0 MB)  TX bytes:1174367 (1.1 MB)

Answer 2

The answer is routing.
Actually in Windows too most.