10 Jan
2020
10 Jan
'20
2:23 p.m.
On Fri, Jan 10, 2020 at 10:19 PM Brandon Martin <lists.nanog@monmotha.net> wrote:
The idea isn't necessarily that you explicitly null-route them but rather that you block/ignore announcements of them on the assumption that malfeasants may be attepmting to squat on them or otherwise use them for some form of, well, malfeasance. As such, the filter you build isn't just e.g. "2a10::/12" (if indeed that range was to be considered a single bogon) but rather "2a10::/12 ge 12" which means you'd block more-specifics within that range, too.
Is there a good and easy way for me to generate such prefix filters automatically for common routing platforms? A BGP feed is not going to do it. Regards, Baldur