my point is, the test is faulty. maybe bug isn't the "correct" word choice. But if the test thinks there is incorrect port forwarding on a router less setup then the test needs revising.
It's not saying that you have "incorrect port forwarding" it's simply implying that there may still be issues that may prevent most, some, or only few people from connecting to you.
Most, Some, or Few is dependant on WHICH of the tests they are performing you are failing. I don't think it necessary that they explain in the message which of the tests you're failing.
If you'd read my first guide "Networking for the Gamer" you'd know that especially in a P2P scenario where level of NAT-filtering is hugely important you could run into the following scenario.
Host (behind strict-NAT) ->> No one can connect
Host (behind moderate-NAT) ->> OPEN and MODERATE NAT clients can connect but STRICT is SOL
Host (behind open-NAT) ->> OPEN, MODERATE and
some STRICT NAT setups will be able to connect
So, even if you're behind OPEN-NAT, allow WAN-ping, and whatever else they're testing for (keep in mind this test is also there for them to gather info on how to make things better) you may still receive a message warning that people may or may not be able to connect to you, because in a P2P (unlike client-server) environment the "connection-process" is
not entirely up to you. There is nothing "faulty" in that logic.
the Monk