I’m sorry alzhao, but it doesn’t work.
When I push the button “Save & Apply” in /etc/config/firewall I find these lines of text
config forwarding
option dest 'lan'
option src 'VPN_client'
config forwarding
option dest 'VPN_client'
option src 'lan'
but when I reboot, I find this lines
config forwarding 'forwarding_vpn1'
option dest 'VPN_client'
option src 'lan'
Why?