COMMUNICATION MANAGEMENT SYSTEM, COMMUNICATION MANAGEMENT METHOD, AND MANAGEMENT APPARATUS

A communication management system includes a GW and a server. The GW relays communication with a destination site via a first NW when an FQDN included in a communication request exists in a list. The server supplies the list to the GW. The server includes an aggregation unit that obtains a record including a communication FQDN, a detection GW, and accompanying information, aggregates the amount of access for each of the FQDNs based on the obtained record, and generates an attribute rank table on attribute of interest and a communication rank table for all the GWs. The server includes an extraction unit that extracts FQDNs highly ranked in the percentage of the number of accesses from the communication rank table and the attribute rank table based on a predetermined extraction ratio, as the list for the GWs corresponding to the attribute of interest, and distributes the list to the GW.