Looks like a fat finger event...
From Level 3: "On October 4, our voice network experienced a service disruption affecting some of our customers in North America due to a configuration error. We know how important these services are to our customers. As an organization, we're putting processes in place to prevent issues like this from recurring in the future. We were able to restore all services by 9:31am Mountain time."
http://www.theregister.co.uk/2016/10/05/level3_voip_blackout_cause/ -----Original Message----- From: NANOG [mailto:nanog-bounces@nanog.org] On Behalf Of Mel Beckman Sent: Tuesday, October 4, 2016 1:09 PM To: Marco Teixeira <admin@marcoteixeira.com> Cc: Shawn Ritchie <shawnritchie@gmail.com>; NANOG list <nanog@nanog.org> Subject: Re: Level 3 voice outage Possibly somebody YANGed when they should have yinged :) -mel beckman On Oct 4, 2016, at 1:06 PM, Marco Teixeira <admin@marcoteixeira.com<mailto:admin@marcoteixeira.com>> wrote: Yeap, i know, it was what i understood, as it is my opinion that a zero day would fit better... in the pure speculation world :) At the end of the day... maybe some undocumented fault int some obscure functionality that was activated/deployed a long time ago, and just revealed it self now... There are so many things that can go wrong on complex networks even with all the controls imposed on changes... On Tue, Oct 4, 2016 at 8:54 PM, Shawn Ritchie <shawnritchie@gmail.com<mailto:shawnritchie@gmail.com>> wrote: Well, Level3 has by no means said that this was the result of a DDoS, that's just speculation on behalf of folks who do not work at Level3 so far. On Tue, Oct 4, 2016 at 2:49 PM Marco Teixeira <admin@marcoteixeira.com<mailto:admin@marcoteixeira.com>> wrote: I won't believe a company like Level3 would not deploy backplane protection/policing on routers. Also, 1Tb/s aggregated DDoS towards OVH network didn't pause or rebooted routers. And i guess both companies have had their share of (D)DoS in the past, so they had the time to get up to the challenge. Now... there where times where one malformed IP packet would cause a memory leak leading to a router reboot... :)? On Tue, Oct 4, 2016 at 8:23 PM, Mel Beckman <mel@beckman.org<mailto:mel@beckman.org>> wrote:
765 Gbps per second directed at a router's interface IP might give the router pause, so to speak :)
-mel
On Oct 4, 2016, at 12:10 PM, Marco Teixeira <admin@marcoteixeira.com<mailto:admin@marcoteixeira.com>> wrote:
Multiple reboots across several markets... Does not seem something that full pipes would trigger. Had it been an approved chance it would have been rolled back i guess... On the other hand, a zero day could apply...
Em 04/10/2016 19:54, "Mel Beckman" <mel@beckman.org<mailto:mel@beckman.org>> escreveu:
Sure. The recent release of the IoT DDoS attack code in the wild.
-mel
On Oct 4, 2016, at 11:42 AM, Valdis.Kletnieks@vt.edu<mailto:Valdis.Kletnieks@vt.edu> wrote:
On Tue, 04 Oct 2016 18:14:54 -0000, Mel Beckman said:
This could be DoS attack.
Or a missing comma in a code update.
Or a fumble-fingered NOC monkey.
Or....
You have any reason to suspect a DoS attack rather than all the other possibilities?
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