Auto-Generated Address Objects; Address Book Folders - D-Link DFL-1660 User Manual

3.1.5. Auto-Generated Address
Objects
The result of combining these two will be a single address range containing 192.168.0.10 -
192.168.0.19.

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
The Default Gateway Address
all-nets

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 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.
For each Ethernet interface in the system, two IP Address
objects are predefined; one object for the IPv4 address of the
actual interface, and one object representing the local network
for that interface.
Interface IPv4 address
<interface-name>_ip and network objects are 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.
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 IP address object is initialized to the IPv4
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.
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Chapter 3. Fundamentals
objects are named