| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To trace a packet even in a network in which information included in each packet can be rewritten. <P>SOLUTION: A packet printing device 400A generates PPa-1 for specifying a packet 250 which is not rewritten yet by a packet conversion device 500 for rewriting information (an IP address, a port number, etc.) included in a packet (250 (250')) flowing into a network to be monitored at the time of passage and PPb-1 for specifying a rewritten packet 250' and respectively stores the PPa-1 and the PPb-1 in 1st and 2nd PP storage parts 406A, 406B included in the packet storage device 400A. In receiving a retrieval request including the PPa-1 for specifying a tracing target packet from a tracing manager 300, the packet printing device 400A retrieves the 1st PP storage part 406A or the 2nd PP storage part 406B and transmits the retrieved result to the tracing manager 300. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
