Somebody else might find this information usefull.
I’ve just discovered that World of Warcraft’s update procedure (the second file it downloads, after you restart) uses Bit-torrent to do it’s update. So if you’re looking to enable World of Warcraft on your network, enable Bit-torrent.
You’ll see lots of port 3724 connections, non-working unless you allow it through.
-Eugenevdm
I’m assuming there is no other workaround to get WoW updates to work properly without allowing bittorrent 
We have a lot of customers that play WoW and always hear the complaining but they can use fileplanet or any other web site to get the updates, I guess they are just lazy, maybe I’ll make a local torrent tracker and hijack there WoW downloader client to use the local tracker instead 
but that’s just too much work, come on someone figure out something
You might be able to allow port 3724 before disallowing your Bit-torrent and get it working this way…I have noticed various posts on this forum where users manipulate port 3724 independantly of their peer-to-peer restrictions presumably to get WoW updates working.