Watchguard Firebox X20E User Manual page 76

Configuring the Trusted Network
Select the Restrict Access by Hardware MAC Address check box.
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Click Scan to have the Edge find all known hardware addresses on the network. If you want the
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Edge to try to resolve host names for all Windows computers it finds during the scan process,
make sure the Try to resolve Windows host names during scan check box is selected. This can
make the scan procedure take more time.
The Scan Allowed Address Control dialog box appears.
Select one or more devices that you want to add to your list of allowed MAC addresses for this
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interface. Make sure that the Media Type is identified and is correct, because a computer with
more than one NIC card can have more than one MAC address.
Press and hold the CTRL key to select more than one device. You can select from more than one
column at the same time. Click OK to add the device or devices to your list of allowed MAC
addresses.
64 Firebox X Edge e-Series