Slow torrents

I have a problem with slow torrents on my network. I have a smoothwall firewall/router and computers hooked up to it via switches and a wireless ap. When I am downloading using my dsl line which is 5mbps my speeds rarely go over 10KB/s-30KB/s even if speedtest.net shows my speed to be good at 4.8-4.9mbps.

If I tether my computer to my iPhone it will download as much as torrents as I want and max out my 3G connection at 150-180KB/s.

I am using uTorrent as my client and when I am connected to my network the icon on it is green meaning it has good connection and no firewall issues and i even checked using a website to see if port 43833 is accesible and it is.

When I use my 3G tethering it also is green.

What makes my home network download slower?

Could be your ISP blocking torrent traffic. Are you using encryption on the torrents?

From what I understand when torrenting, you should always use a static ip on the box running the client. Port forwarding if necessary on your firewall/router. I use tixati as client, which is both windows and linux portable, and do not even need to port forward, but I only have a router & no firewall other than software. You could also try using magnet links as they are peer-peer only and use no trackers at all.

Connected it directly to my modem and I got speeds of over 500KB/s so I checked out my smoothie and it was my QOS settings that was causing it.