On 5/6/03 7:51 PM, "E.B. Dreger" <eddy+public+spam@noc.everquick.net> wrote:
SD> Date: Tue, 6 May 2003 19:28:48 -0400 (EDT) SD> From: Sean Donelan
SD> The Pakistan Telecommunications Company Ltd has aquired a SD> firewall to solve the DDOS situation impacting Internet SD> service in the country. An unnamed security advisor asserted SD> the proper use of a firewall would control the DDOS attacks SD> and prevent hacking.
Now the DDoS melts the pipes _and_ the firewall. I'd like to know if said "consultant" ever considered recommending the PTC contact their upstreams for help with backtrace/blocking. Anyone with a modicum of clue (or Google access) should figure out that one...
Not every upstream is as clueful as Uunet, and not every noc employee is as clueful as Chris and Brian at UUnet. It has been my experience that most upstreams have no concept that they CAN backtrace, and generally have no interest in helping you do it. I'm not mudslinging here, so I won't say who my experience is with, but a few transitless/near transitless upstreams I've dealt with were most unhelpful, either because they didn't know how to help, or worse, they did know how to help and didn't care. And, depending on the nature of the DDoS attack, perhaps it isn't related to saturation, but rather to overloading router processors, or something else that can effectively be filtered customer-side? Our policy as of late has just been to make sure we have equipment on our side fast enough to filter at wire speed, and get enough capacity to our upstreams that it is signifigantly unlikely that anyone could generate enough traffic to saturate it (in which case, we would have no choice but to ask carriers to filter, and backtrace). --Phil ISPrime
Eddy -- Brotsman & Dreger, Inc. - EverQuick Internet Division Bandwidth, consulting, e-commerce, hosting, and network building Phone: +1 (785) 865-5885 Lawrence and [inter]national Phone: +1 (316) 794-8922 Wichita
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