D-Link DFL-260-IPS-12 Product Manual - Page 81
Auto-Generated Address Objects, 3.1.6. Address Book Folders, Interface Addresses
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3.1.6. Address Book Folders Chapter 3. Fundamentals 3.1.5. Auto-Generated Address Objects To simplify the configuration, a number of address objects in the address book are automatically created by NetDefendOS when the system starts for the first time and these objects are used in various parts of the initial configuration. The following address objects are auto-generated: Interface Addresses Default Gateway all-nets For each Ethernet interface in the system, two IP Address objects are predefined; one object for the IP address of the actual interface, and one object representing the local network for that interface. Interface IP address objects are named _ip and network objects are named _net. As an example, an interface named lan will have an associated interface IP object named lan_ip, and a network object named lannet. An IP Address object named wan_gw is auto-generated and represents the default gateway of the system. The wan_gw object is used primarily by the routing table, but is also used by the DHCP client subsystem to store gateway address information acquired from a DHCP server. If a default gateway address has been provided during the setup phase, the wan_gw object will contain that address. Otherwise, the object will be left empty (in other words, the IP address will be 0.0.0.0/0). The all-nets IP address object is initialized to the IP address 0.0.0.0/0, which represents all possible IP addresses. The all-nets IP object is used extensively in the configuration of NetDefendOS and it is important to understand its significance. 3.1.6. Address Book Folders In order to help organise large numbers of entries in the address book, it is possible to create address book folders. These folders are just like a folder in a computer's file system. They are created with a given name and can then be used to contain all the IP address objects that are related together as a group. Using folders is simply a way for the administrator to conveniently divide up address book entries and no special properties are given to entries in different folders. NetDefendOS continues to see all entries as though they were in large table of IP address objects. The folder concept is also used by NetDefendOS in other contexts such as IP rule sets, where related IP rules can be grouped together in administrator created folders. 81