really??? There's no catV running from the ONT to the router? I thought that the new installs had catV for the PC-destined IP and coax for the STB running out of the ONT- with no coax at the router. My install is the previous generation- all IP goes to the router, and the router splits the traffic onto coax or cat5. If there is cat5 between the ONT and router, and no coax at your router, then all PC-destined IP (ie internet) is on the cat5, and filtering will have no effect.