The next thing you need to do on the router is to add a route for your VPN subnet. In the routing table on your Router, add 10.8.0.0/24 to be sent via 192.168.0.10. This is needed for the traffic from your LAN clients to be able to find their way back to the VPN clients. If this is not possible, you need add such routes explicitly on all the LAN clients you want to access via the VPN. Another less laborious way to do this, is to add a rule to masquerade the network 10.8.0.0/24 with iptables, as done with the third rule in the iptables commands below.