Re: De-bogonising 2a10::/12

[Baldur Norddahl <baldur.norddahl () gmail com>]

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