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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: We have a firewall (was Re: Pakistan government orders ISPservice level agreement)
On 5/6/03 7:51 PM, "E.B. Dreger" <[email protected]> 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 > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > Date: Mon, 21 May 2001 11:23:58 +0000 (GMT) > From: A Trap <[email protected]> > To: [email protected] > Subject: Please ignore this portion of my mail signature. > > These last few lines are a trap for address-harvesting spambots. > Do NOT send mail to <[email protected]>, or you are likely to > be blocked. >
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