Address Book Folders; Fqdn Address Objects - D-Link NetDefendOS User Manual

named <interface-name>_net. As an example, an interface named If1 will have an associated
interface IP object named If1_ip, and a network object named If1_net.
These addresses are stored in an address book folder called InterfaceAddresses.
When changing the IP address of an Ethernet interface, it is strongly recommended to
change the address of the default address book object and not change the IP address directly
on the Ethernet interface.
• The Default Gateway Address
An IPv4 Address object with the suffix "_gw" is also auto-generated for the default interface
used for connection to the public Internet. For example, if the Internet connection is assumed
to be on interface wan then the default gateway address gets the name wan_gw. This IP
address represents the external router which acts as the gateway to the Internet.
This address is used primarily by the routing table, but is also used by the DHCP client
subsystem to store gateway address information acquired through DHCP. If a default
gateway address has been provided during the setup phase, the default gateway object will
contain that address. Otherwise, the object will be left as 0.0.0.0/0.
•
The all-nets Address Object
The all-nets IP address object is initialized to the IPv4 address 0.0.0.0/0, which represents all
possible IPv4 addresses. The all-nets IP object is used extensively when configuring of
NetDefendOS and it is important to understand its significance.

3.1.6. Address Book Folders

In order to help organize 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 a 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.
As discussed previously, there will be a default folder created on initial startup called
InterfaceAddresses which contains the default address objects for the Ethernet interfaces
detected by NetDefendOS.

3.1.7. FQDN Address Objects

Overview
Instead of specifying an address object to be an IP address, it can instead be specified as an
FQDN (for example: server1.example.com) in an FQDN Address object. NetDefendOS will then
automatically resolve the FQDN to an IP address when the object is referenced by other
configuration objects.
FQDN Address Object Properties
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Chapter 3: Fundamentals