User guide

Configuring Firewall Options
User Guide 75
2 Click Submit.
Enabling the MAC address override
If your ISP has previously registered your computer’s MAC address
and will only allow connections from that MAC address, enable this
option and use the MAC address of the computer that was previ-
ously used to connect to the ISP on this line. The MAC address
must be entered in this format: hhhhhhhh
where:
• Each of the 12 “h” digits is a hexadecimal character with a value
between 0 and 9 or between “a” and “f”.
• The MAC address may not conflict with:
- Another node on the external network
- The Firebox X Edge trusted network MAC address
- The Firebox X Edge optional network MAC address
• The MAC address may not be 000000000000
• The MAC address may not be ffffffffffff
Example: 0012340ABCDE
To determine your MAC address, use the ipconfig/all and ifconfig
commands at the command prompt.
Follow these steps to enable this option:
1 Select the Enable override MAC address for the External
Network or the Enable override MAC address for the Optional
Network checkbox.
2 Type the new MAC address for the Firebox X Edge external
network in the applicable field.
3 Click Submit.
NOTE
If the MAC address for the external network field is cleared and
the Firebox X Edge is rebooted, the Firebox X Edge is reset to the
factory-default MAC address for the external network.
To prevent MAC address collisions, the Firebox X Edge searches the
external network periodically for the override MAC address. If the
Firebox X Edge finds a device that uses the same MAC address, the
Firebox resets to the factory-default external MAC address and
reboots.