My IPSec Client is configured fine and I am able to connect. I can access the remote LAN subnet behind the USG / ZyWall.
But I need all my traffic of my computer to go into the IPSec VPN tunnel.
You can send all of traffic into VPN tunnel after established VPN tunnel.
(1) In VPN gateway(phase 2) setting, “remote LAN address” please setup as IP Subnet “0.0.0.0/0”
(2) Disable split tunneling function.
On VPN software: VPN connection > IKEv1 parameters > Disable split tunneling.