Dear NANOG/IEPG Folks; As you should know by now from reading the papers, Panix, the first ISP in NYC, has come under a new denial of service attack. The Wall Street Journal quoted Bill Cheswick to the effect that the attack is "unstoppable". Almost, but not quite, true. It's true that there isn't anything that Panix can do on its own to stop this attack. It's true that it would be hard to verify source addresses at MAEs and NAPs. But we could all verify source addresses at the first hop entry points. And get default route and unauthorized transit protection to boot. I'd like to know what the community thinks can be done to deal with an escalation of these attacks should this occur. Are you doing any source address verification now? Are you doing anything to help Panix? Could you? How seriously do you take this threat? If Panix were to go out of business and Bob Metcalfe wrote a column on it, ( :-) do you think we would have to deal with it together then, or can we sit tight and expect it to blow over? After all, it's easy to dump chemicals in the reservoir, but we still drink the water, right? Thanks. --Kent ~~~~~ ~~~~~ ~~~~~ ~~~~~ ~~~~~ ~~~~~ ~~~~~ ~~~~~ ~~~~~ ~~~~~ ~~~~~ ~~~~ Kent W. England Six Sigma Networks 1655 Landquist Drive, Suite 100 Voice/Fax: 619.632.8400 Encinitas, CA 92024 kwe@6SigmaNets.com Experienced Internet Consulting ~~~~~ ~~~~~ ~~~~~ ~~~~~ ~~~~~ ~~~~