Setting up Advanced Proxy

Hello!, I’m fairly new to IPFire and I’m trying to setup the Advanced Web Proxy download throttle with no succes, how can I check if I’m in fact using the proxy, I only have Green Zone configured, Proxy is Enabled and on Transparent mode. Still, downloads are not capped, also, is there a way to set a custom bandwidth for the hosts? Since I have it on 51200 Kbps, but I’d like to set it a little higher.