I see...thanks a for the explanation about 1 to 1 NAT which is somehow block in using WAN1.
I've tried that putting the 203.x.0.1 in WAN1 and do a 1 to 1 NAT 192.168.1.201~201 => 203.x.0.1~1 and didn't work at all.
I think I can live with their logs...
Thank you very much.
You cannot use the IP Address 203.x.0.1 in WAN1 and then also use that address for One-to-One NAT on 192.168.1.201~201. You CANNOT specify the WAN1 IP Address in a One-to-One NAT setup.