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We performed statistical analysis on the total PTR resource record (RR) based DNS query packet traffic from a university campus network to the top domain DNS server through March 14th, 2009, when the network servers in the campus network were under inbound SSH dictionary attack. The interesting results are obtained, as follows: (1) the network servers, especially, they have a function of SSH services,...
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 through January 17th to February 1st, 2009...
Currently, the network security appliance is one of the most important research topics in IT security. The use of log files for further security analysis was proven their importance in the development of a three DNS query traffic based detection model system for a proactive detection of security threat in the university campus network. In the current detection strategy we can detect some suspicious...
We carried out an entropy study on the DNS query traffic from the outside of a university campus network to the top domain DNS server when querying about reverse resolution on the PC room terminals through April 1st, 2007 to April 30th, 2008. The following interesting results are given: (1) In January 17th, 2008, the DNS query traffic is mainly dominated by several specific IP addresses as their query...
We statistically investigated on the unusual big DNS resolution traffic toward the top domain DNS server from a university local campus network in April 11th, 2006. The following results are obtained: (1) In April 11th, the DNS query traffic includes a lot of fully qualified domain names (FQDNs) of several specific Web sites as name resolution keywords. (2) Also, the DNS query traffic includes a plenty...
We investigated statistically on the unusual DNS query traffic from several DNS clients like Linux servers and/or PC terminals in the campus network of a university. The interesting results are: (1) The DNS query traffic includes several keywords relating with database servers in the local area network, to which the Linux servers and PC terminals are belonging. (2) These keywords are generated by...
For the quality assurance of IT literacy, the IT based learning environments and e-learning courses have been intensively developed. University implements "The basic course of information technologies A and B" as required subjects of all fresh students. Each course has approximately 1,800 students, and is managed by sharing the identical contents in the blended learning style. All of the...
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