User guide

Configuring Firewall Options
User Guide 109
To change the MAC address of the external interface:
1 Select the Enable override MAC address for the External
Network check box, or select the Enable override MAC address
for the Failover Network check box.
You can select the check boxes together.
2 In the External network override AC address or Failover
network override AC address text box, type the new MAC
address for the Firebox X Edge external or failover network.
3 Click Submit.
N OTE N OTE
If the field marked MAC address for the external network is
cleared and the Firebox X Edge is restarted, the Firebox X Edge
uses the standard 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 inter-
face is unique on your network. If the Edge finds a device using the
same MAC address, the Firebox changes back to the standard MAC
address for the external interface. Then it restarts.