You can play tricks with BGP to do this. Here's how MAPS RBL does it, and how you can use it:

http://www.mail-abuse.org/rbl/usage.html#BGP

Mark

What I was saying is that they had already set up some type of blackhole system that I was lead to believe they were doing at the router level (not mail system level). When they had us blackhole, we couldn't get past their core routers. I know your next thougt is that they just threw us into

That's actually pretty clean, too. I haven't implemented a route server on my networks. But I play around on Cerf Net's sometimes when I tracking down BGP problems. What's the consensus on using one at the Tier 2 level? Karyn -----Original Message----- From: Mark Mentovai [mailto:marklist@ggn.net] Sent: Thursday, July 06, 2000 1:23 PM To: nanog@merit.edu Subject: RE: RBL-type BGP service for known rogue networks? Karyn Ulriksen wrote: their

route filter, but my understanding is that they offered a service that you subscribed to and the updated the filter on the fly. Which sounds like it would work for what you may be looking for in the "kiddie script network" scenario (which I assume means either IRC crapola or DOS crapola in general) or those wonderful .ru sites serving out that hardcore kiddie porn stuff via cgi calls.

You can play tricks with BGP to do this. Here's how MAPS RBL does it, and how you can use it: http://www.mail-abuse.org/rbl/usage.html#BGP Mark -- Do not reply directly to this e-mail address -- Mark Mentovai UNIX Engineer Gillette Global Network