When playing with the QOS (L7 filter rules), I can find no filter for RDP (the protocol used for Remote Desktop) on the list. However, when I list the /etc/l7-protocols/protocols, it is found that there's a file called rdp.pat, which I think should be the filter for RDP. Therefore, I added that type to the service list in QOS with port number 0~0 and protocol L7 and gave it a Express priority. So far, the router is able to identify those RDP connections but I can't feel any difference in performance. Any comment?