User guide

User Guide 71
Network Settings
To change the MAC address of the external interface:
1. Connect to the System Status page. Type
https:// in the browser address bar, and the IP address of
the Firebox X Edge trusted interface.
The default URL is: https://192.168.111.1
2. From the navigation bar, click Network > External.
The External Network Configuration page appears.
3. On the Advanced tab, select the Enable override MAC address check box.
4. In the Override MAC address text box, type the new MAC address for the Firebox X Edge external
network.
You must enter the MAC address as a hexadecimal number.
Do not use extra characters, such as spaces or hyphens.
5. Click Submit.
You must restart the Firebox to see the changes.
If the Override MAC address field is cleared and the Firebox X Edge is restarted, the Firebox X Edge uses the
default MAC address for the external network.
To decrease problems with MAC addresses, the Firebox X Edge makes sure that the MAC address you assign
to the external interface is unique on your network. If the Edge finds a device that uses the same MAC address,
the Firebox changes back to the standard MAC address for the external interface and starts again.
About configuring the trusted network
You must configure your trusted network manually if you do not use the Network Setup Wizard.
You can use static IP addresses or DHCP for the computers on your trusted network. The Firebox X Edge e-
Series has a built-in DHCP server to give IP addresses to computers on your trusted and optional networks. You
can also change the IP address of the trusted network.
The factory default settings of a Firebox X Edge DHCP server automatically give IP addresses to computers on
the trusted network. The trusted network starts with IP address 192.168.111.1. It is a class C network with a
subnet mask of 255.255.255.0. The Edge can give an IP address from 192.168.111.2 to 192.168.111.254. These
are private addresses that are not seen outside the trusted network. The factory default settings use the same
DNS server information on the internal and external interfaces.
If necessary, you can disable the DHCP server. Or, you can use the Edge as a DHCP relay agent and send DHCP
requests to a DHCP server on a different network using a VPN tunnel. You can also use static IP addresses for
the computers on your trusted network.
Any changes to the trusted network configuration page require that you click Submit. If necessary, the
Firebox restarts.