So I decided to make a separate box specifically for content filtering... I installed traffic shaping and got it working perfectly, and then I configured my proxy settings, but as soon as I enable transparent proxy, traffic shaping ceases to function at all. So now I can block sites using the proxy, but I cannot use traffic shaping to restrict bandwidth on things like video streaming or P2P software...
Any ideas what I've done wrong? Or does Traffic shaping simply not work combined with transparent proxy?