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Configuration examples for the D-Link 

NetDefend Firewall series  

 
 

Scenario: How to configure Transparent Mode in DHCP Network 

Environment 

 

Platform Compatibility: All NetDefend Firewall Series

 

 
 
 

Last update: 2008-03-07

 

Overview 

In this document, the notation 

Objects->Address book

 means that in the tree on the left 

side of the screen 

Objects

 first should be clicked (expanded) and then 

Address Book

.  

 
Most of the examples in this document are adapted for the DFL-800. The same settings can 
easily be used for all other models in the series. The only difference is the names of the 
interfaces. Since the DFL-1600 and DFL-2500 has more than one lan interface, the lan 
interfaces are named lan1, lan2 and lan3 not just lan. 
 
The screenshots in this document is from firmware version 2.11.02. If you are using an 
earlier version of the firmware, the screenshots may not be identical to what you see on 

your browser. 
 
To prevent existing settings to interfere with the settings in these guides, reset the 
firewall to factory defaults before starting. 
 

 

 

 

 

Summary of Contents for NetDefend DFL Series

Page 1: ...in this document are adapted for the DFL 800 The same settings can easily be used for all other models in the series The only difference is the names of the interfaces Since the DFL 1600 and DFL 2500 has more than one lan interface the lan interfaces are named lan1 lan2 and lan3 not just lan The screenshots in this document is from firmware version 2 11 02 If you are using an earlier version of th...

Page 2: ...isting DHCP network between an Internet access router and LAN without the need to reconfigure clients in LAN The WAN and LAN interfaces of the firewall will be configured to operate in Transparent Mode It is preferred to configure IP addresses on the WAN and LAN interfaces as this can improve performance during automatic discovering of hosts ...

Page 3: ...work object Name gw world IP Address 192 168 1 254 Click OK Go to Interfaces Ethernet Make sure the lan interface has the following settings IP Address lan_ip Network lannet Default Gateway None Select Enable Transparent Mode checkbox Click OK The settings for the wan1 interface should be IP Address wan1_ip Network wan1net Default Gateway gw world Select Enable Transparent Mode checkbox Click OK S...

Page 4: ...rver to offers IP address for network clients in transparent mode Go to Objects Address book InterfaceAddresses Add DHCP server address object For example Name DHCP_server IP address 192 168 1 250 Click OK Go to System DHCP DHCP Relays Add DCHP relay Name DHCP Action Relay Source Interface lan DHCP Server to relay to DHCP_server Allowed IP offers from server all nets Click OK Save and Activate ...

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