| Publisher | Kumamoto University | ||
|---|---|---|---|
| Format | 127.0KB PDF | Date added | 29 Oct 2004 |
| Topics | Network Security, Denial of Service, Intrusion Detection Systems | ||
| Downloads | 66 | ||
The syslog messages of the topdomain DNS servers in Kumamoto University were statistically investigated when having receiving a large amount of DNS query packets like a Distributed Denial-of-Service (DDoS) attack. The interesting results are: The DNS query-based DDoS attacking packets considerably include reverse (PTR) records. The PTR records include a lot of unregistered IP addresses of the university as their query contents. Thus, one can detect the DNS query-based DDoS attack by only watching the traffic of unregistered IP address-based DNS query PTR record packets. Also, the author developed and implemented an Intrusion Prevention System (IPS) for the DNS query-based DDoS attack on the top domain DNS servers.
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