On Fri, Dec 14, 2012 at 7:16 AM, M D L <41magnum at liberty.eprci.com> wrote: > Any decent ISPs should be filtering the private address space > from crossing their network. Leaving the vast majority of ISPs allowing it, alas. Comcast uses 10/8 for their management network, and I've seen it "leak out" into their customer net more than once. -- Ben