Optimum online provides the 851 with which they require you to use.We need the 861 because of MAC security.Is there a way we can have it:Modem -> 851 -> 861-> Computer. But noone will be able to disconnect the 861 from the 851 and plug a computer dir...

Is it possible to store the dsl login credentials on the 861, and use a dsl modem as the bridge? That way if you disconnect the cisco router, you dont have internet access.Thanks