Josephine_Legr answered on August 19th 19 at 23:05
Depends on network configuration:
If it is possible to allocate a subnet to the VPN (for example it uses the network 10.10.0.0 and 192.168.1.0 LAN), the IP Route create rule, "on those IP this gateway". Well, everything else is determined by the rules ibid. IP VPN-server -> gateway "Eth1"