nanog mailing list archives
Re: Qwest outage In NY
From: Richard A Steenbergen <ras () e-gerbil net>
Date: Wed, 8 May 2002 13:20:49 -0400
On Wed, May 08, 2002 at 12:32:00PM -0400, Patrick McEvilly wrote:
Qwest has confirmed a DOS attach against two of their Juniper routers in the NY POP. I believe they had a UDP attack last week also (maybe on Saturday). This time the DOS was a TCP attack on the 100Mb management interface on the Juniper, leaving the box unable to pass packets, hence BGP stays up and a full routing table but you cannot get anywhere.
Ok I'll bite... What crackpipe are you smoking from? If the link from the RE to the PFE (the fxp1) became saturated, or enough packets hit the RE to blow away the processor, BGP (and the CLI, and everything else) would certainly fall over. Much like with any other router using distributed forwarding, if the management processor dies, the traffic will continue to forward until the routing protocols timed out and the rest of the network stopped sending it traffic. The attack would then stop hitting the box in question, it would come back up, and the cycle would repeat. This assumes that there are actual routing protocols, in the case where it's statically routed the box just stays down. :) But Juniper is more resilient to this form of attack than most, and you have the ability to filter packets going to the RE on any IP rev. -- Richard A Steenbergen <ras () e-gerbil net> http://www.e-gerbil.net/ras PGP Key ID: 0x138EA177 (67 29 D7 BC E8 18 3E DA B2 46 B3 D8 14 36 FE B6)
Current thread:
- Qwest outage in NY Eric Gauthier (May 08)
- <Possible follow-ups>
- re: Qwest outage In NY Drew Linsalata (May 08)
- re: Qwest outage In NY Andre Chapuis (May 08)
- RE: Qwest outage In NY Patrick McEvilly (May 08)
- Re: Qwest outage In NY Richard A Steenbergen (May 08)
- RE: Qwest outage In NY Patrick McEvilly (May 08)
- RE: Qwest outage In NY Streiner, Justin (May 08)
- Re: Qwest outage In NY Richard A Steenbergen (May 08)
- Re: Qwest outage In NY Eric Gauthier (May 08)
- RE: Qwest outage In NY Patrick McEvilly (May 08)