I have a problem getting all of my uTorrent traffic getting recognised in the right class. I followed the configuration proposed on the first page, but added exeptions for STEAM and other games, in the appropriate class) I gave uT Class D with the following settings (Port 39148, DHT disabled, Encryption enabled, UPNP & NAT-PMP enabled, 1000 max global , 500 max connections per torrent) TCP/UDP | Class D | uTorrent Port: 39148 Now, the default set class is Class C, because I don't want uT to hurt misc apps and odd games that need to access the web. The problem is that a lot of uT traffic (about half) is recognised as Class C, on a range of srcPorts from 58000 to 62000 (estimated). I used Microsoft Network Monitor 3.4 to look at all connections on my NIC. No other computers are on use on the network. So, Does anyone experienced the same thing ? Is it a bad idea to set the default class higher than uT ? Edit: I doubled the TCT connection timout times from your suggestions. It gave me problems with steam Games.