Communication connection method for connecting server computer to client
computer via network, comprises storing group identification information
items for identifying groups, in relation to information indicating
number of connection request packets uniquely and secretly allocated to
each group of groups, each group including users allowed to access server
computer, counting connection request packets received from client
computer within preset period to obtain counted number, determining
whether information corresponds to counted number, acquiring one group of
groups to which connection request packets corresponding to counted
number are allocated, if information corresponds to counted number,
determining whether resources of server computer are allocated to group
indicated by acquired group identification item, generating connection
request acknowledgement packet in response to at least one of received
connection request packets, and transmitting generated connection request
acknowledgement packet to network.