15.28. Why does my MSN Messenger transfer files very slowly when using traffic shaper?

Because the traffic shaping rules to limit BitTorrent throughput cover the same range of ports MSN uses. Magic Shaper uses 6881-6999 to classify BitTorrent traffic, which encompasses the MSN ports 6891-6900. You can change the rules that classify BitTorrent traffic in the traffic shaping pages. Typically BitTorrent only uses 6881-6889.

Credit: Chris Bagnall