North American Network Operators Group
Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

Re: Weird attack or traffic (Was Re: The impending DDoS storm)

  • From: Mike Tancsa
  • Date: Fri Aug 15 01:34:16 2003



Yes, we are starting to see this as well. We are filtering at the edge, so the bogus packets are not getting out.

We have a /19 of 64.7.128.0/19 and 64.7.229.241 is totally bogus for our network.

Aug 14 21:59:16 telus-151front /kernel: ipfw: 30000 Deny TCP 64.7.229.241:1069 204.79.188.11:80 out via fxp1
Aug 14 21:59:16 telus-151front /kernel: ipfw: 30000 Deny TCP 64.7.39.113:1904 204.79.188.11:80 out via fxp1
Aug 14 21:59:16 telus-151front /kernel: ipfw: 30000 Deny TCP 64.7.105.240:1739 204.79.188.11:80 out via fxp1
Aug 14 21:59:16 telus-151front /kernel: ipfw: 30000 Deny TCP 64.7.235.113:1178 204.79.188.11:80 out via fxp1
Aug 14 21:59:16 telus-151front /kernel: ipfw: 30000 Deny TCP 64.7.46.113:1014 204.79.188.11:80 out via fxp1
Aug 14 21:59:16 telus-151front /kernel: ipfw: 30000 Deny TCP 64.7.111.240:1849 204.79.188.11:80 out via fxp1
Aug 14 21:59:17 telus-151front /kernel: ipfw: 30000 Deny TCP 64.7.176.240:1685 204.79.188.11:80 out via fxp1


---Mike

At 01:04 AM 15/08/2003 -0400, Haesu wrote:

Is anyone else seeing backscatters on your network about windowsupdate.com's IP?

Someone who transits through 65.123.21.137 router is sending out lots of packets
to 204.79.188.11 (windowsupdate.com) in which its not currently advertised to
internet as we speak. Not to mention, packets seem to be source-spoofed to
65.124.16.0/21 (our block), causing backscatter from 65.123.21.137 to our
network...

Any ideas/or anyone seeing similar effect? Is someone who is administrative to
Qwest Communications WASH01-WAN-65-123-21 (NET-65-123-21-0-1) aware of this may
be? It looks like a Qwest customer CPE router to me but I dunno..

See below for traffic snapshot..

-hc

--
Sincerely,
Haesu C.
TowardEX Technologies, Inc.
WWW: http://www.towardex.com
E-mail: [email protected]
Cell: (978) 394-2867

k00:50:22.807370 65.123.21.137 > 65.124.23.125: icmp: net 204.79.188.11 unreachable
00:50:22.891672 65.123.21.137 > 65.124.22.48: icmp: net 204.79.188.11 unreachable
00:50:22.979997 65.123.21.137 > 65.124.22.98: icmp: net 204.79.188.11 unreachable
00:50:23.047340 65.123.21.137 > 65.124.22.21: icmp: net 204.79.188.11 unreachable
00:50:23.133616 65.123.21.137 > 65.124.22.72: icmp: net 204.79.188.11 unreachable
00:50:23.520405 65.123.21.137 > 65.124.23.107: icmp: net 204.79.188.11 unreachable
00:50:23.745844 65.123.21.137 > 65.124.22.3: icmp: net 204.79.188.11 unreachable
00:50:23.829309 65.123.21.137 > 65.124.22.54: icmp: net 204.79.188.11 unreachable
00:50:24.493650 65.123.21.137 > 65.124.23.113: icmp: net 204.79.188.11 unreachable
00:50:24.530074 65.123.21.137 > 65.124.23.35: icmp: net 204.79.188.11 unreachable
00:50:24.618082 65.123.21.137 > 65.124.23.86: icmp: net 204.79.188.11 unreachable
00:47:50.611529 65.123.21.137 > 65.124.18.100: icmp: net 204.79.188.11 unreachable
00:47:50.649962 65.123.21.137 > 65.124.17.151: icmp: net 204.79.188.11 unreachable
00:47:50.711865 65.123.21.137 > 65.124.17.124: icmp: net 204.79.188.11 unreachable
00:47:50.756960 65.123.21.137 > 65.124.17.47: icmp: net 204.79.188.11 unreachable
00:47:50.826367 65.123.21.137 > 65.124.20.8: icmp: net 204.79.188.11 unreachable
00:47:52.355967 65.123.21.137 > 65.124.22.126: icmp: net 204.79.188.11 unreachable
00:47:52.587141 65.123.21.137 > 65.124.20.46: icmp: net 204.79.188.11 unreachable
00:47:53.865460 65.123.21.137 > 65.124.22.87: icmp: net 204.79.188.11 unreachable

00:48:05.250757 65.123.21.137 > 65.124.16.1: icmp: net 204.79.188.11 unreachable
00:48:05.713640 65.123.21.137 > 65.124.17.86: icmp: net 204.79.188.11 unreachable
00:48:05.841169 65.123.21.137 > 65.124.17.60: icmp: net 204.79.188.11 unreachable
00:48:06.013042 65.123.21.137 > 65.124.16.33: icmp: net 204.79.188.11 unreachable
00:48:06.549540 65.123.21.137 > 65.124.17.41: icmp: net 204.79.188.11 unreachable
00:48:06.803847 65.123.21.137 > 65.124.17.92: icmp: net 204.79.188.11 unreachable
00:48:06.981930 65.123.21.137 > 65.124.17.15: icmp: net 204.79.188.11 unreachable
00:48:07.277776 65.123.21.137 > 65.124.18.100: icmp: net 204.79.188.11 unreachable
00:48:07.343120 65.123.21.137 > 65.124.18.74: icmp: net 204.79.188.11 unreachable
00:48:07.486285 65.123.21.137 > 65.124.17.47: icmp: net 204.79.188.11 unreachable
00:48:07.569901 65.123.21.137 > 65.124.20.8: icmp: net 204.79.188.11 unreachable
00:48:08.117407 65.123.21.137 > 65.124.18.106: icmp: net 204.79.188.11 unreachable
00:48:08.356732 65.123.21.137 > 65.124.20.41: icmp: net 204.79.188.11 unreachable
00:48:08.637485 65.123.21.137 > 65.124.20.14: icmp: net 204.79.188.11 unreachable
00:48:08.944750 65.123.21.137 > 65.124.22.126: icmp: net 204.79.188.11 unreachable
00:48:08.946623 65.123.21.137 > 65.124.22.49: icmp: net 204.79.188.11 unreachable