Good idea, but there's a trust issue. If I were Comcast I might configure the box to lie about our backhaul network in order to spork the p2pers. On 10/22/07, michael.dillon@xxxxxx <michael.dillon@xxxxxx> wrote: > > > I can't think of an obvious way for a p2p client to detect this. > > Work through middleboxes installed in the ISP's network and configured > by the ISP. > > --Michael Dillon >