Enable UPnP on DD-WRT Wireless Router
If you want to stream media using DLNA to wireless connected PS3 or XBOX you must enable UPnP on your wiress router. Routers with DD-WRT Firmware support UPnP. To enable UPnP on dd-wrt router, connect to router through the browser, go to NAT/Qos, UPnP page and select UPnP service radio button.
If you are looking for how to stream media using UPnP see
Sharing Audio,Video and Pictures using UPnP and DLNA