Shinichiro Kubota

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We carried out an entropy study on the DNS query traffic from the Internet to the top domain DNS server in a university campus network through January 1st to March 31st, 2009. The obtained results are: (1) We observed a difference for the entropy changes among the total-, the A-, and the PTR resource records (RRs) based DNS query traffic from the Internet(More)
Monitoring network security of a university is one of the most important jobs for the network managers. Without the monitoring, it is hard to keep the network safe. It is common that the security policy of a university has the term which states that monitoring network security is a mandate. However it is very hard to monitor every part of a university's(More)
We developed and evaluated Euclidian distance based detection method for SSH dictionary attacks in the total PTR resource record (RR) based DNS query request packet traffic from the campus network to the DNS cache server in a university through January 1st to December 31st, 2009. The obtained results are: (1) The network servers, especially, they have a(More)
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