NetComm NB3 User manual

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NetComm NB3 My ADSL Modem
PPPoE Half Bridge Procedure
Overview:
The outcome of this procedure will place the NB3 into half bridge mode where the NB3 will
establish the PPPoE connection with your ISP (Internet Service Provider). The NB3 will then
assign the allocated public IP address to a single connected DHCP client Ethernet interface.
The method of connection is commonly used when connecting the NB3 to either of the
following
•Another router that doesn’t include embedded PPPoE authentication software.
•Linux firewall distributions such as Smoothwall, IPCop etc.
•You simply require NAT (Network Address Translation) to be completely disabled but
prefer the NB3 to establish and maintain your DSL connection allowing a connected
device / machine to perform routing and fire walling functions.
Instructions:
1. Reset the NB3 to factory defaults by holding the tiny button on the back for 10
seconds whilst the unit is powered.
2. Using a web browser log into NB3’s web based configuration ie http://192.168.1.1
which is the default IP for accessing the NB3 via the ethernet connection.
3. When prompted enter username and password of ‘root’ and ‘root’ (defaults)
respectively to log into the NB3 configuration.
4. From the Home tab select Quick Configuration scroll down to the PPP section then
enter your username and password in the corresponding fields that you have been
provided with to connect to your ISP. Keep in mind this is case sensitive then click the
Submit button on this page.

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5. Once complete select the System Mode option from the Home tab followed by
enabling ZIPB (Zero Installation PPPoE Bridge) prior to selecting the Submit button.
6. From the Services tab then IP Filter and set the Security Level to None
7. Move to the Admin tab then Commit and Reboot, click Commit then the Reboot
buttons and wait approximately 1 minute whilst the NB3 reboots.
8. To verify that the NB3 has established an Internet connection simply check that a
green circle is present under the Home page Status column for your WAN Interface.

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9. Once your Internet connection is established the NB3 should now pass the assigned
public IP address to a solely connected DHCP client Ethernet interface.
In some instances you may need to renew / repair the DHCP connection in order for the
connected interface to pickup your public address.
Note: As NAT will be disabled in this mode it is recommended to enable another form of
fire walling whether it be hardware or software based behind the NB3. This should help
prevent any damage from external Internet attacks.