| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a constitution which, in a communication apparatus of a type of making an inquiry to an external apparatus about a processing content to apply to a received packet and learning thereof, improves tolerance to DoS attack etc. and suppresses increase in load for the improvement. <P>SOLUTION: A communication system comprises: a server which checks a packet against a definition pattern for determining whether the packet is unauthorized or not, thereby disposing an unauthorized packet and reporting to a transmission source a processing content to apply to the other packets; and the communication apparatus which transfers an unknown packet to the server and processes the received packet on the basis of the processing content reported from the server. <P>COPYRIGHT: (C)2013,JPO&INPIT |
