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2005 Symposium on Applications and the Internet Workshops (SAINT 2005 Workshops)
Measurement of DNS Traffic Caused by DDoS Attacks
Trento, Italy
January 31-February 04
ISBN: 0-7695-2263-7
Keisuke Ishibashi, NTT Corporation
Tsuyoshi Toyono, NTT Corporation
Hirotaka Matsuoka, NTT Corporation
Katsuyasu Toyama, NTT Corporation
Masahiro Ishino, NTT Communications
Chika Yoshimura, NTT Communications
Takehiro Ozaki, NTT Communications
Yuichi Sakamoto, NTT Communications
Ichiro Mizukoshi, NTT Communications

We report the measurement results of Domain Name System (DNS) traffic during the periods of DDoS attacks against a Web server. The attack was caused by virus infected machines. We monitored DNS query packets at DNS cache servers of an Japanese ISP, Open Computer Networks (OCN). We especially focused on those sent by the virus to find the IP address of the target web server.

By analyzing the measurement results in detail, we found that the DNS configuration change of the authoritative DNS servers of the target site caused a significant increase in the number of queries.We also show how the DNS operators mitigated those queries by changing the configuration of DNS cache servers and authoritative servers.

Citation:
Keisuke Ishibashi, Tsuyoshi Toyono, Hirotaka Matsuoka, Katsuyasu Toyama, Masahiro Ishino, Chika Yoshimura, Takehiro Ozaki, Yuichi Sakamoto, Ichiro Mizukoshi, "Measurement of DNS Traffic Caused by DDoS Attacks," saint-w, pp.118-121, 2005 Symposium on Applications and the Internet Workshops (SAINT 2005 Workshops), 2005
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