COMMUNICATION APPARATUS, COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND COMMUNICATION PROGRAM

摘要

PROBLEM TO BE SOLVED: To acquire information required for analyzing an attack pattern by identifying communication data suspected to be an unknown attack.SOLUTION: A communication apparatus 1 for connecting at least one of apparatuses 3 to a network includes: log information storage means 14 for storing log information of communication data to be transmitted to the apparatuses 3 via the network; abnormality detection means 12 for confirming the states of the apparatuses 3, extracting log information of a fixed time until just before the elimination of a response among log information with the apparatuses as destinations from the log information storage means 14 concerning the apparatus 3 without making a response to state confirmation, and registering the apparatus in gray list storage means 15; and determination means 11 for transmitting communication data to an analyzer 2 when a part of the communication data to be transmitted to the apparatus 3 via the network coincides with at least one parameter of any one piece of log information stored in the gray list storage means 15.