backbones filtering unsanctioned sites

[jfmezei_nanog at vaxination.ca (Jean-Francois Mezei)]

On 2017-02-16 14:59, Sadiq Saif wrote:

> From -
> https://arstechnica.com/tech-policy/2017/02/a-court-order-blocked-pirate-sites-that-werent-supposed-to-be-blocked/


Many thanks.

pardon my ignorance here, but question:

For an outfit such as Cogent which acts not only as a transit provider,
but also edge provider to large end users, can it easily implement such
a court order to block only edge interfaces and not to its transit
infrastructure?

(aka: propagate null routes for 104.31.19.30 only to interfaces that
lead to end users, but leave core/GBP aspects without the block.)

Or is BGP and any internal routing protocols so intermingled that it
becomes hard to manage such blocks ?

The difficulty for network to block traffic becomes an important
argument when trying to convince governments that blocking should not be
done. (ex: Qu?bec government wanting to block access to gambling sites
except its own).