On 2013-05-30 08:10, Jared Mauch wrote: > > On May 30, 2013, at 2:23 AM, Jeroen Massar <[email protected]> wrote: > >> Just showing that quite a few networks are not doing uRPF. > > Problem in many cases is that the vendors don't have working uRPF. > > CSCuh1350
I am unfortunately aware that even in 2013 the big boys do not play along with a BCP from 2000... ;( (and as mentioned, for transits, it can be tricky to turn on uRPF or do other kind of prefix-filters in some cases, though try they should) > Even if the providers wanted to do it (which many do), in IPv6 land > it's actually harder due to things like ULA, mapped-v4-in-v6 and other things. In the case of ULA (which started this thread) and mapped-v4-v6, does one really need to use these? One should have more than ample space in IPv6 to carve out things for special use and null-route those on the borders in case one does not want them reachable. And if one does not use ULA etc, one does not source it either. Greets, Jeroen
