/usr/sbin/iptables -t mangle -A PREROUTING -s 10.0.1.0/24 -j MARK --set-mark 1

# Client 00:E0:91:0E:A8:F3 is valid to 2038-01-19 04:14:07.
/usr/sbin/iptables -t mangle -A PREROUTING -m mac --mac-source 00:E0:91:0E:A8:F3 -j MARK --set-mark 2

/usr/sbin/iptables -t nat -A PREROUTING -s 10.0.1.0/24 -d 0/0 -j DNAT --to 10.0.1.2 -m mark --mark 1
/usr/sbin/iptables -t nat -A POSTROUTING -s 10.0.1.0/24 -d 0/0 -j MASQUERADE -m mark --mark 2