Checking with http://www.canyouseeme.org , every port said "error, cannot access" after following the instructions
I am having the same problem. tried a couple of port checking sites and both said port closed or connection refused
Save yourself a headache and buy a better router.
There is a reason why these things are free.
1. They drop port forwarding rules at random. (seen this happen on 3 different units)
2. You cannot port forward anything attached to a Wifi station, as the actual device never appears in the routing table.
3..... and even when it works the port forwarding interface is godawful, and unnessesarily convoluted.