Looks to me like the target has moved, anyone else seeing similar? Jan 23 20:19:08 LND02 named[9611]: client 63.217.28.226#39489: view external: query (cache) './NS/IN' denied Jan 23 20:19:09 LND02 named[9611]: client 63.217.28.226#20558: view external: query (cache) './NS/IN' denied Jan 23 20:19:11 LND02 named[9611]: client 63.217.28.226#38525: view external: query (cache) './NS/IN' denied Jan 23 20:19:12 LND02 named[9611]: client 63.217.28.226#41535: view external: query (cache) './NS/IN' denied Jan 23 20:19:12 LND02 named[9611]: client 63.217.28.226#51220: view external: query (cache) './NS/IN' denied Jan 23 20:19:13 LND02 named[9611]: client 63.217.28.226#28869: view external: query (cache) './NS/IN' denied Jan 23 20:19:14 LND02 named[9611]: client 63.217.28.226#12337: view external: query (cache) './NS/IN' denied Jan 23 20:19:15 LND02 named[9611]: client 63.217.28.226#41346: view external: query (cache) './NS/IN' denied Jan 23 20:19:15 LND02 named[9611]: client 63.217.28.226#56831: view external: query (cache) './NS/IN' denied Jan 23 20:19:17 LND02 named[9611]: client 63.217.28.226#13352: view external: query (cache) './NS/IN' denied Jan 23 20:19:18 LND02 named[9611]: client 63.217.28.226#55466: view external: query (cache) './NS/IN' denied Jan 23 20:19:18 LND02 named[9611]: client 63.217.28.226#24586: view external: query (cache) './NS/IN' denied Jan 23 20:19:19 LND02 named[9611]: client 63.217.28.226#43105: view external: query (cache) './NS/IN' denied
On Fri, 2009-01-23 at 19:46 +0000, Steven Lisson wrote: > Hi, > > I agree with seeing no traffic to/from 66.230.128.15 but am still seeing > flows 'from' 66.230.160.1 > > Regards, > Steve > > -----Original Message----- > From: Phil Rosenthal [mailto:p...@isprime.com] > Sent: Saturday, 24 January 2009 4:12 AM > To: nanog@nanog.org > Subject: Re: isprime DOS in progress > > Just a friendly notice, the attack against 66.230.128.15/66.230.160.1 > seems to have stopped for now. > > -Phil > On Jan 22, 2009, at 6:01 AM, Bjørn Mork wrote: > > > Graeme Fowler <gra...@graemef.net> writes: > > > >> I've been seeing a lot of noise from the latter two addresses after > >> switching on query logging (and finishing an application of Team > >> Cymru's > >> excellent template) so I decided to DROP traffic from the addresses > >> (with source port != 53) at the hosts in question. > >> > >> Well, blow me down if they didn't completely stop talking to me. Four > >> dropped packets each, and they've gone away. > >> > >> Something smells "not quite right" here - if the traffic is > >> spoofed, and > >> my "Refused" responses have been flying right back to the *real* IP > >> addresses, how are the spoofing hosts to know that I'm dropping the > >> traffic? > > > > Did you filter *only* 66.230.128.15/66.230.160.1, or are you dropping > > traffic from other sources too? Looks like some of the other source > > addresses are controlled by the DOSers. Possibly used to detect > > filters? > > > > These clients may look similar to the DOS attack, but there are subtle > > differences: > > > > Jan 18 05:08:33 canardo named[32046]: client 211.72.249.201#29656: > > view external: query (cache) './NS/IN' denied > > Jan 18 05:08:33 canardo named[32046]: client 211.72.249.201#29656: > > view external: query (cache) './NS/IN' denied > > Jan 18 05:08:34 canardo named[32046]: client 211.72.249.201#29656: > > view external: query (cache) './NS/IN' denied > > Jan 18 05:47:00 canardo named[32046]: client 211.72.249.201#29662: > > view external: query (cache) './NS/IN' denied > > Jan 18 05:47:01 canardo named[32046]: client 211.72.249.201#29662: > > view external: query (cache) './NS/IN' denied > > Jan 18 05:47:01 canardo named[32046]: client 211.72.249.201#29662: > > view external: query (cache) './NS/IN' denied > > Jan 18 06:25:22 canardo named[32046]: client 211.72.249.201#29664: > > view external: query (cache) './NS/IN' denied > > Jan 18 06:25:22 canardo named[32046]: client 211.72.249.201#29664: > > view external: query (cache) './NS/IN' denied > > Jan 18 06:25:23 canardo named[32046]: client 211.72.249.201#29664: > > view external: query (cache) './NS/IN' denied > > Jan 18 07:03:41 canardo named[32046]: client 211.72.249.201#29667: > > view external: query (cache) './NS/IN' denied > > Jan 18 07:03:41 canardo named[32046]: client 211.72.249.201#29667: > > view external: query (cache) './NS/IN' denied > > Jan 18 07:03:42 canardo named[32046]: client 211.72.249.201#29667: > > view external: query (cache) './NS/IN' denied > > Jan 18 07:42:08 canardo named[32046]: client 211.72.249.201#29670: > > view external: query (cache) './NS/IN' denied > > Jan 18 07:42:09 canardo named[32046]: client 211.72.249.201#29670: > > view external: query (cache) './NS/IN' denied > > Jan 18 07:42:09 canardo named[32046]: client 211.72.249.201#29670: > > view external: query (cache) './NS/IN' denied > > Jan 18 08:20:29 canardo named[32046]: client 211.72.249.201#29673: > > view external: query (cache) './NS/IN' denied > > Jan 18 08:20:29 canardo named[32046]: client 211.72.249.201#29673: > > view external: query (cache) './NS/IN' denied > > Jan 18 08:20:30 canardo named[32046]: client 211.72.249.201#29673: > > view external: query (cache) './NS/IN' denied > > Jan 18 08:58:50 canardo named[32046]: client 211.72.249.201#29678: > > view external: query (cache) './NS/IN' denied > > Jan 18 08:58:51 canardo named[32046]: client 211.72.249.201#29678: > > view external: query (cache) './NS/IN' denied > > Jan 18 08:58:51 canardo named[32046]: client 211.72.249.201#29678: > > view external: query (cache) './NS/IN' denied > > Jan 18 09:37:12 canardo named[32046]: client 211.72.249.201#29679: > > view external: query (cache) './NS/IN' denied > > Jan 18 09:37:12 canardo named[32046]: client 211.72.249.201#29679: > > view external: query (cache) './NS/IN' denied > > Jan 18 09:37:13 canardo named[32046]: client 211.72.249.201#29679: > > view external: query (cache) './NS/IN' denied > > > > Jan 20 07:02:51 canardo named[32046]: client 213.61.92.192#46716: > > view external: query (cache) './NS/IN' denied > > Jan 20 07:02:51 canardo named[32046]: client 213.61.92.192#46716: > > view external: query (cache) './NS/IN' denied > > Jan 20 07:02:51 canardo named[32046]: client 213.61.92.192#46716: > > view external: query (cache) './NS/IN' denied > > Jan 20 07:41:21 canardo named[32046]: client 213.61.92.192#46752: > > view external: query (cache) './NS/IN' denied > > Jan 20 07:41:21 canardo named[32046]: client 213.61.92.192#46752: > > view external: query (cache) './NS/IN' denied > > Jan 20 07:41:21 canardo named[32046]: client 213.61.92.192#46752: > > view external: query (cache) './NS/IN' denied > > Jan 20 08:19:46 canardo named[32046]: client 213.61.92.192#46785: > > view external: query (cache) './NS/IN' denied > > Jan 20 08:19:46 canardo named[32046]: client 213.61.92.192#46785: > > view external: query (cache) './NS/IN' denied > > Jan 20 08:19:46 canardo named[32046]: client 213.61.92.192#46785: > > view external: query (cache) './NS/IN' denied > > Jan 20 08:58:12 canardo named[32046]: client 213.61.92.192#46808: > > view external: query (cache) './NS/IN' denied > > Jan 20 08:58:12 canardo named[32046]: client 213.61.92.192#46808: > > view external: query (cache) './NS/IN' denied > > Jan 20 08:58:12 canardo named[32046]: client 213.61.92.192#46808: > > view external: query (cache) './NS/IN' denied > > Jan 20 09:36:34 canardo named[32046]: client 213.61.92.192#46833: > > view external: query (cache) './NS/IN' denied > > Jan 20 09:36:34 canardo named[32046]: client 213.61.92.192#46833: > > view external: query (cache) './NS/IN' denied > > Jan 20 09:36:34 canardo named[32046]: client 213.61.92.192#46833: > > view external: query (cache) './NS/IN' denied > > Jan 20 10:14:58 canardo named[32046]: client 213.61.92.192#46858: > > view external: query (cache) './NS/IN' denied > > Jan 20 10:14:58 canardo named[32046]: client 213.61.92.192#46858: > > view external: query (cache) './NS/IN' denied > > Jan 20 10:14:58 canardo named[32046]: client 213.61.92.192#46858: > > view external: query (cache) './NS/IN' denied > > > > Jan 22 06:27:28 canardo named[32046]: client 66.238.93.161#34373: > > view external: query (cache) './NS/IN' denied > > Jan 22 06:27:28 canardo named[32046]: client 66.238.93.161#34373: > > view external: query (cache) './NS/IN' denied > > Jan 22 06:27:28 canardo named[32046]: client 66.238.93.161#34373: > > view external: query (cache) './NS/IN' denied > > Jan 22 07:05:55 canardo named[32046]: client 66.238.93.161#34420: > > view external: query (cache) './NS/IN' denied > > Jan 22 07:05:55 canardo named[32046]: client 66.238.93.161#34420: > > view external: query (cache) './NS/IN' denied > > Jan 22 07:05:55 canardo named[32046]: client 66.238.93.161#34420: > > view external: query (cache) './NS/IN' denied > > Jan 22 07:44:20 canardo named[32046]: client 66.238.93.161#34473: > > view external: query (cache) './NS/IN' denied > > Jan 22 07:44:20 canardo named[32046]: client 66.238.93.161#34473: > > view external: query (cache) './NS/IN' denied > > Jan 22 07:44:21 canardo named[32046]: client 66.238.93.161#34473: > > view external: query (cache) './NS/IN' denied > > Jan 22 08:22:38 canardo named[32046]: client 66.238.93.161#34503: > > view external: query (cache) './NS/IN' denied > > Jan 22 08:22:38 canardo named[32046]: client 66.238.93.161#34503: > > view external: query (cache) './NS/IN' denied > > Jan 22 08:22:38 canardo named[32046]: client 66.238.93.161#34503: > > view external: query (cache) './NS/IN' denied > > Jan 22 09:00:56 canardo named[32046]: client 66.238.93.161#34540: > > view external: query (cache) './NS/IN' denied > > Jan 22 09:00:56 canardo named[32046]: client 66.238.93.161#34540: > > view external: query (cache) './NS/IN' denied > > Jan 22 09:00:56 canardo named[32046]: client 66.238.93.161#34540: > > view external: query (cache) './NS/IN' denied > > Jan 22 09:39:20 canardo named[32046]: client 66.238.93.161#34574: > > view external: query (cache) './NS/IN' denied > > Jan 22 09:39:21 canardo named[32046]: client 66.238.93.161#34574: > > view external: query (cache) './NS/IN' denied > > Jan 22 09:39:21 canardo named[32046]: client 66.238.93.161#34574: > > view external: query (cache) './NS/IN' denied > > > > > > Notice the pattern: > > 3 probes every 38 minutes > > Each probe from the same source port > > Source port increases slowly and steadily > > > > This looks like some application actually waiting for a response. The > > slow source port change is probably an indication that this client > > only > > tests a small number of DNS servers. I guess that this client is > > either > > one of the many bots used to send the spoofed requests, or maybe a bot > > not allowed to spoof its source and therefore used for other > > purposes. In any case, I assume that other DNS servers may see such > > control sessions coming from other addresses. > > > > These 3 clients started probing my DNS server almost simultaneously > > on January 8th: > > > > > > Jan 8 19:33:52 canardo named[26496]: client 213.61.92.192#31195: > > view external: query (cache) './NS/IN' denied > > Jan 8 19:33:52 canardo named[26496]: client 213.61.92.192#31195: > > view external: query (cache) './NS/IN' denied > > Jan 8 19:33:52 canardo named[26496]: client 213.61.92.192#31195: > > view external: query (cache) './NS/IN' denied > > Jan 8 19:36:29 canardo named[26496]: client 66.238.93.161#11299: > > view external: query (cache) './NS/IN' denied > > Jan 8 19:36:29 canardo named[26496]: client 66.238.93.161#11299: > > view external: query (cache) './NS/IN' denied > > Jan 8 19:36:30 canardo named[26496]: client 66.238.93.161#11299: > > view external: query (cache) './NS/IN' denied > > Jan 8 19:37:47 canardo named[26496]: client 211.72.249.201#29112: > > view external: query (cache) './NS/IN' denied > > Jan 8 19:37:47 canardo named[26496]: client 211.72.249.201#29112: > > view external: query (cache) './NS/IN' denied > > Jan 8 19:37:47 canardo named[26496]: client 211.72.249.201#29112: > > view external: query (cache) './NS/IN' denied > > > > Maybe preparing for the attack on ISPrime? I didn't start receiving > > spoofed requests from 66.230.128.15/66.230.160.1 before January 20th > > > > > > I just tried filtering the probing addresses. This made the probing > > stop immediately after dropping a set of 3 probes. But the spoofed > > requests continuted at the same rate as before, so this does not > > support > > my theory. > > > > However, I believe it would be too much of a coincidence if there > > isn't > > some connection between the probing and the DOS attack. It would be > > interesting to hear if others see similar probing. > > > > > > > > Bjørn > > > > >
