As per https://www.htpcguides.com/force-torrent-traffic-vpn-split-tunnel-debian-8-ubuntu-16-04/, but with few upgrades.
Everything in one script: https://github.com/GAS85/pia/blob/master/split_tunnel_VPN.sh
Difference to Original:
- Add random VPN Land change on start/restart.
- Add IP Tables rules that avoid nginx reverse proxy usage.
Lets start
You have fullcontrol over which applications you want to route over VPN.