I had been using azureus for quite sometime and yes, all the firewall things are settled, routers, or my own applications. Things work fine and there's no NAT problem for a long time. I just dl some torrent and it suddenly changed to the 'firewalled' status. I retry other ports and it's still like this. I do the NAT/firewall test it says testing port ok. So i tried stopping the current torrent dl and try some other torrents and the NAT suddenly become OK. When i go back to the prev dl again it became firewalled. Is it something to do with the torrents?