User's Manual

Configuring the External Network
User Guide 47
When you configure the external network, set how your Internet
Service Provider (ISP) gives an IP address to your Firebox. There are
three methods to give IP addresses:
• DHCP - Network administrators use the Dynamic Host
Configuration Protocol (DHCP) to give IP addresses to
computers on their network automatically. With DHCP, your
Firebox can receive a new external address each time it connects
to the ISP network.
• Static IP address - Network administrators use static IP
addresses to manually give an IP address to each computer on
their network. Because more work is necessary with this
procedure, an ISP frequently charges more for a static IP
address. Static IP addresses are also known as manual addresses.
• PPPoE - Many ISPs use the Point to Point Protocol over
Ethernet (PPPoE) to give IP addresses to each computer on their
network. Frequently they use PPPoE with a dial-up network
infrastructure.
To configure your Firebox® X Edge, you must know how it gets the
IP address for the external interface. If you do not know the
method, get the information from your ISP or corporate network
administrator.
If your ISP uses DHCP
The default configuration sets the Firebox X Edge to get the exter-
nal address information through DHCP. If your ISP uses DHCP, your
Edge gets a new external IP address when it starts and connects to
the ISP network.
For more information about DHCP, see “About DHCP” on page 5.
To manually set your Firebox to use DHCP on the external interface:
1 To connect to the System Status page, type the IP address of
the trusted network in the browser.
The default IP address is: https://192.168.111.1
2 From the navigation bar, select Network > External.
The External Network Configuration page appears.
3 From the Configuration Mode drop-down list,
select DHCP Client.
4 Click Submit.