Hello all, Absolutely. I have some good answers for you. ::WILLING to filter (0) Savvis - Took them 10 minutes to drop the 254/255 port utilization of ICMP traffic on my T-1 I have from them. Their NOC (hats off to 'Chris') is super-responsive. (1) UUNet - They're helpful, if you can get through to an actual engineer, not a help desk drone...what is WITH these help desk people?? ::CLUELESS (0) PSINet - Sorry guys. Both our T-1's (Savvis and PSINet) on one segment got nailed....the Savvis boys loosened the noose, PSINet (help desk drone) asked me to submit logs to their 'help@' mailbox, wait up to 24-hours for a call back, and they'd go from there. Folks, I work for a financial-services corporation, in 24 hours, I'd lose, what $200 million in business? No wonder they're bankrupt. (Great engineers, less-than-intelligent drones at the 'help desk'). (1) Winstar - /chuckle/. They couldn't find me in their customer database, but by the time they firgured out who I was, I had hung up and cancelled the line. (We got this as a freebie, couldn't complain). (2) AT&T - I can't stand support drones that don't understand what an ICMP flood is, much less know what to do with it. I had to explain to them that ICMP flooding is a DDoS and that I needed someone from engineering. Wow...Kevin couldn't convince this half-wit I conversed with to get me to an engineer. I gave up and just let the router die. Cheers! Ralph M. Los Asst. Vice-President, Internet Systems and Security EnvestNet Advisory Corp. rlos@envestnet.com (312) 827-3945 (direct) (312) 296-9003 (wireless w/voicemail) -----Original Message----- From: ASV [mailto:lists-nanog@silverwraith.com] Sent: Thursday, June 28, 2001 5:50 PM To: nanog@merit.edu Subject: ISP's who filter ICMP during DoS? Does anyone have a list of which ISPs are willing to filter ICMP packets for you when your network is being (D)DoS'd, and which prefer to simply blackhole / disconnect you, and which will do absolutely nothing?? I'm finding it hard to gather this information and it occured to me that this is an obvious factor when choosing an ISP! Thanks,