Watchguard Firebox X15 User Manual page 138

Configuring Firewall Settings
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 do not see the option for the Failover Network if you do not have
the WAN Failover option installed.
2
In the External network override MAC 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.
If the changes are successful, you must restart the Firebox.
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.
124
N N
OTE OTE
WatchGuard Firebox X Edge