No problem.
I'm not sure about that link, it's not even on this site. Anyways. firewalls and routing are separate things.
You need to reconfigure your router to use 2 LANs:
- One uses normal Internet (this exists by default)
- One that uses your VPN via "PBR" configs (do not setup auto routes!)
You will configure your phone to be in the same Firewall Zone that the VPN VLAN/Interface uses. Therfore:
- Your phone will connect to your WAN IP as normal
- You VPN network interface will connect to Mullvad
- Your phone will use the VPN network for it's Internet traffic
- Done!
config rule
option in 'lan2'
option dest '0.0.0.0/0'
option priority '2'
option lookup '2'
config rule
option in 'phone_vpn'
option dest '0.0.0.0/0'
option priority '3'
option lookup '2'
config route
option interface 'vpn'
option target '0.0.0.0'
option netmask '0.0.0.0'
option table '2'