constant flow of root queries
"Brian Collins" <[email protected]>
| Newsgroups | gmane.comp.security.incidents |
|---|---|
| Message-ID | <[email protected]> |
Good day folks. This morning an admin asked us to check on a large amount of traffic targeting several DNS servers in our network (both our own DNS servers and customer co-located DNS servers). In looking at the traffic I see that the source is making several queries a second for DNS root. I have included a small sample from tcpdump below. Not sure what the motive is here. The TTLs are all 235. The random source ports makes me think possibly spoofed traffic. I can put packet dumps up on a website in libpcap format if anyone is interested. They are still going on as I type this. Thanks for any insight you can lend. 08:44:31.681706 IP 207.210.68.202.18257 > 216.130.152.71.53: 7127+ [1au] ANY ANY? . (28) 08:44:31.935719 IP 207.210.68.202.17460 > 216.130.152.71.53: 16133+ [1au] ANY ANY? . (28) 08:44:32.191226 IP 207.210.68.202.11958 > 216.130.152.71.53: 24095+ [1au] ANY ANY? . (28) 08:44:32.453721 IP 207.210.68.202.30962 > 216.130.152.71.53: 28728+ [1au] ANY ANY? . (28) 08:44:32.965355 IP 207.210.68.202.30683 > 216.130.152.71.53: 12271+ [1au] ANY ANY? . (28) 08:44:33.468862 IP 207.210.68.202.9966 > 216.130.152.71.53: 28170+ [1au] ANY ANY? . (28) 08:44:33.720408 IP 207.210.68.202.9920 > 216.130.152.71.53: 28160+ [1au] ANY ANY? . (28) 08:44:33.976693 IP 207.210.68.202.22511 > 216.130.152.71.53: 9346+ [1au] ANY ANY? . (28) 08:44:34.233664 IP 207.210.68.202.20625 > 216.130.152.71.53: 18580+ [1au] ANY ANY? . (28) 08:44:34.495015 IP 207.210.68.202.7023 > 216.130.152.71.53: 7968+ [1au] ANY ANY? . (28) 08:44:34.742492 IP 207.210.68.202.6257 > 216.130.152.71.53: 11859+ [1au] ANY ANY? . (28) 08:44:35.001415 IP 207.210.68.202.25244 > 216.130.152.71.53: 5372+ [1au] ANY ANY? . (28) 08:44:35.257812 IP 207.210.68.202.17576 > 216.130.152.71.53: 14270+ [1au] ANY ANY? . (28) 08:44:35.778259 IP 207.210.68.202.3384 > 216.130.152.71.53: 1508+ [1au] ANY ANY? . (28) 08:44:36.034492 IP 207.210.68.202.13754 > 216.130.152.71.53: 23670+ [1au] ANY ANY? . (28) 08:44:36.290463 IP 207.210.68.202.11008 > 216.130.152.71.53: 8899+ [1au] ANY ANY? . (28) 08:44:36.805271 IP 207.210.68.202.18348 > 216.130.152.71.53: 19806+ [1au] ANY ANY? . (28) 08:44:37.061876 IP 207.210.68.202.19532 > 216.130.152.71.53: 31844+ [1au] ANY ANY? . (28)