route script to
/usr/local/lib/openvpn/route on the client. Make it executable with
push redirect-gateway option from the OpenVPN server config.
Add these options to the OpenVPN client config:
setenv OPENVPN_ROUTE_TABLE 94 route-noexec route-up /usr/local/lib/openvpn/route route 0.0.0.0 184.108.40.206 route 220.127.116.11 18.104.22.168
Run these commands as root on the client before starting OpenVPN, replacing VPN_SERVER_IP_ADDRESS as appropriate:
ip rule add table 94 ip rule add to VPN_SERVER_IP_ADDRESS unreachable ip rule add to VPN_SERVER_IP_ADDRESS table main echo 1 > /proc/sys/net/ipv6/conf/all/disable_ipv6
These commands need only be run once per boot. The changes they make will be lost when the system reboots.