I have tried forwarding "all" ports, but nothing changed
iptables -t nat -A PREROUTING -p tcp -d <NAS IP> --dport 100:3000 -j DNAT --to-destination 192.168.201.2:139
iptables -A FORWARD -p tcp -d 192.168.201.2 --dport 100:3000 -j ACCEPT
iptables -t nat -A PREROUTING -p tcp -d <NAS IP> --dport 100:3000 -j DNAT --to-destination 192.168.201.2:139
iptables -A FORWARD -p tcp -d 192.168.201.2 --dport 100:3000 -j ACCEPT