Using RT-AC86U on merlin (second to latest update). I opened a port to use with a p2p app. Then I verified with a port checker (https://canyouseeme.org/) to make sure it was working. It kept saying error it could not see the port. I was a bit confused since opening a port is pretty straightforward. I tried with different port numbers, different protocols (TCP/UDP/both) and they all failed. Finally I opened the app and tried to connect anyway. It connected fine. I went back and retested the port checker and now it said it can see the port. This happens with every port you open -- you have to actually make a connection through the port with the app or device before the port checker will say it is open which makes the port checker useless. I tried a different port checker with the same result. I'm pretty sure it wasn't like this with my last router (non-Asus).
Is this some security measure with the RT-AC86U or a bug?
Is this some security measure with the RT-AC86U or a bug?