User's Manual

Configuring the Optional Network
User Guide 59
location. It gives the reply to the computers on the Firebox optional
network. This option lets computers in more than one office use the
same network address range. This procedure makes the Firebox a
DHCP relay agent .
To configure the Firebox as a DHCP relay agent for the optional
interface:
1 Use your browser to connect to the System Status page. From
the navigation bar, select Network > Optional.
The Optional Network Configuration page appears.
2 Select the Enable DHCP Relay on Optional Network check box.
3 Type the IP address of the DHCP server in the related field.
4 Click Submit.
The Firebox restarts. If the Firebox can not connect to the DHCP server in
30 seconds, it uses its DHCP server to give IP addresses to computers on
the optional network.
Using static IP addresses for optional computers
You can use static IP addresses for some or all of the computers on
your optional network. If you disable the DHCP server, you must
manually configure the IP address and subnet mask of each com-
puter. You can also configure specified computers with a static IP
address. For example, this is necessary when a client server software
application must use a static IP address for the server. Static IP
addresses must be on the same network as the Firebox optional
interface.
To disable the Firebox DHCP server, clear the Enable DHCP Server
on the Optional Network check box on the Optional Network Con-
figuration page.
Adding computers to the optional network
The Firebox X Edge can connect to 1 optional computer. You can
use 10/100 BaseT Ethernet hubs or switches with RJ-45 connectors
to connect more than 1 computer. It is not necessary that the com-
puters on the optional network use the same operating system.
To add more than 1 computers to the optional network:
1 Make sure that each computer has a functional Ethernet card.
2 Set each computer to use DHCP. For more information, see
“Setting your computer to use DHCP,” on page 20.