I need to nat an entire subnet from one range to another when connecting to openvpn server(Qnap nas). I found a way that works using iptables netmap.
iptables -t nat -A PREROUTING -d 10.8.0.0/24 -j NETMAP --to 192.168.1.0/24
The problem is that qnap Nas seems not to have netmap support. I need to know the way to NAT the network using only common nat options(snat, dnat or masquerade).