Configuring The External Network; If Your Isp Uses Dhcp - Watchguard Firebox X20E User Manual

Configuring the External Network

Configure the external interface of your Firebox
Select the procedure your ISP uses to set your IP address. For detailed information, see the
subsequent section in this guide, "Configuring the External Network" on page 54. You can
choose one of these configurations:
- DHCP: If your ISP uses DHCP, type the DHCP information that your ISP gave you. For more
information, see "If your ISP uses DHCP" on page 54.
- PPPoE: If your ISP uses PPPoE, type the PPPoE information that your ISP gave you. For more
information, see "If your ISP uses PPPoE" on page 56.
- Static IP: If your ISP uses static IP addresses, type the static IP address information your ISP gave
you. For more information, see "If your ISP uses static IP addresses" on page 55.
Configure the trusted interface of the Firebox
On this screen, type the IP address of the trusted interface. For more information, see
"Configuring the Trusted Network" on page 59.
After you configure the trusted interface, the Network Setup Wizard is complete.
Configuring the External Network
You must configure your external network manually if you do not use the Network Setup Wizard.
When you configure the external network, set the method your ISP uses to give you an IP address for
your Firebox® X Edge. There are three methods ISPs use to assign IP addresses:
DHCP - Network administrators use DHCP to give IP addresses to computers on their network
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automatically. With DHCP, your Firebox receives an external IP address each time it connects to
the ISP network. It can be the same IP address each time, or it can be a different IP address.
Static IP address - Network administrators use static IP addresses to manually give an IP address
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to each computer on their network. A static IP address can be more expensive than a dynamic IP
address because static IP addresses make it easy to set up servers. Static IP addresses are also
known as manual addresses.
PPPoE - Many ISPs use PPPoE (Point to Point Protocol over Ethernet) to give IP addresses to each
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computer on their network.
To configure your 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

In the default configuration, the Firebox X Edge e-Series gets its external 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 4.
To manually set your Firebox to use DHCP on the external interface:
To connect to the System Status page, type https:// in the browser address bar, followed by the
1
IP address of the Firebox X Edge trusted interface.
The default URL is: https://192.168.111.1
From the navigation bar, select Network > External.
2
The External Network Configuration page appears.
54 Firebox X Edge e-Series