| 摘要 |
The present invention discloses a method for analyzing an IP Gateway's Routing Table for identifying sets of IP addresses ("Disjoint Zones") communicating through the same Gateway, said method comprising the steps of: identify subnets of IP addresses which are directly connected to the Gateway("directly-connected subnets") via a network interface card ("NIC"); associate every route in the Routing Table with a NIC; identify and sort the Routing Table's Critical Points, at which the routing decision may change between successive IP addresses, and identifying Disjoint Zones of IP addresses by locating all the Critical Points at which the routing decision in fact changes between successive IP addresses. According to a further option of the present invention, an External Disjoint Zone is identified in accordance with the NIC which is associated with the default route. According to alternative option of the present invention, the External Disjoint Zone is identified in accordance with trust levels as defined by the user. According to additional option of the present invention the users are enabled to identify the Disjoint Zone types in accordance with their preferences using a graphical interface. The method may be reduced to practice in the form of a software program that can be executed on a standard personal computer with a standard operating system. A preferred embodiment is an Intel x86-based PC running the RedHat Linux operating system.
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