Lan Settings - D-Link NetDefend SOHO DFL-160 User Manual

3.3. LAN Settings

3.3. LAN Settings
The settings in this part of the management web interface determine how the DFL-160's LAN
interface operates. These settings are very similar to the corresponding page for the DMZ interface
(see Section 3.4, "DMZ Settings").
The Logical LAN Interface
There are four physical interfaces in the DFL-160 hardware which are labelled: LAN1...LAN4. As
explained in Section 1.2, "Ethernet Interfaces", these are connected together by a switch fabric in
the DFL-160 so they act as a single logical interface called LAN. This manual, therefore, refers only
to the LAN logical interface and the rules applied to LAN apply to all four physical interfaces but
not the traffic flowing between them.
LAN Interface Options
There are three sections on the web interface page relating to the LAN:
A. LAN Interface Settings
B. Mode
C. DHCP Server Settings
A. LAN Interface Settings
The IP address of the LAN interface is allocated here for NAT and Routing mode. Transparent
mode does not require an IP address to be allocated, instead, the LAN interface automatically gets
the same IP address as the WAN interface.
The presentation of the LAN interface options in the web interface is shown below:
The setting Enable DNS Relay relays DNS queries sent to the LAN interface IP. This should be
enabled if, for example, web browsers running on LAN clients are going to be resolved using
external DNS servers on the internet. Any other situation where URL resolution is required will also
need to find a DNS server. These DNS servers should be manually configured, if this hasn't already
been done automatically through DHCP when connecting to an ISP.
If the Enable DNS Relay option is not enabled then clients will communicate directly with the DNS
servers that are configured for public Internet access and the DNS server will send responses
directly back to the client through the firewall. Relaying will not take place.
B. Mode
There are three modes that are available with the LAN interface. The presentation of the mode
options in the web interface is shown below.
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Chapter 3. The System Menu