Harping just a little more, unless the IP registries take the lead and push their hierarchical allocation tree data out and ISPs pick it up and do useful filtering with it, this problem will continue to occur regularly. Talk to your registry and your router vendors to start getting the pieces in place to get a global solution.

I like the idea of somehow using registry data to help build configs, but confess to not liking the idea of using DNS to do so (the IDR proposal), mostly because I don't see trusting the IP registries to do this, and in fact have a health dose of paranoia about giving routing control (i.e. the availability the service) to a service that can be manipulated by a single person See http://www.news.com/News/Item/0,4,18849,00.html -scott