Re: Public shaming list for ISPs announcing other ISPs IP space by mistake

[Joe Malcolm <jmalcolm () uraeus com>]

Jared Mauch writes:
>       No really, the reason for some leaks isn't because so-and-so was 
> never a customer, they were.  5 years ago.  nobody removed the routes from 
> the IRR or AS-SET or <insert method here> and now the route is learned via
> some other location and it's bypassed your perimiter security and
> infiltrated your BGP.

The issue of cleaning up legacy state for former customers applies to
many things beyond route announcements - though the latter may be one
of the more visible remnants. I suspect relatively few companies can
accurately and completely track the state associated with a customer
such that it can be removed once the customer billing stops. (Or they
stop paying.) This really needs to be automated and the backend
databases need a way to associate records with particular billing
entities, or else you will find yourself slowly cleaning up after past
customers at inconvenient moments for years.

Joe