# Specifying MAC Addresses for Firewall Rules

You can limit communication to only devices with specified MAC addresses, or block devices with specified MAC addresses but permit other communications. Up to 50 MAC addresses can be specified.
1
Start the Remote UI and log on in Management Mode. Starting Remote UI
2
Click [Settings/Registration].
3
Click [Security] [MAC Address Filter].
4
Click [Edit] for a filter type.
[TX Filter]
Select to restrict sending data from the machine to a computer by specifying MAC addresses.
[RX Filter]
Select to restrict receiving data from the machine to a computer by specifying MAC addresses.
5
Specify the settings for packet filtering.
Select the precondition (default policy) to allow or reject the communication of other devices with the machine, and then specify MAC addresses for exceptions.

1 | Select the [Use Filter] check box and click the [Allow] or [Reject] radio button for the [Default Policy]. [Use Filter] Select the check box to restrict communication. Clear the check box to disable the restriction. [Default Policy] Select the precondition to allow or reject other devices to communicate with the machine.
[Allow] | Select to block communication packets when they are sent to or received from devices whose MAC addresses are entered in [Exception Addresses]. Communications with other devices are permitted.
[Reject] | Select to pass communication packets only when they are sent to or received from devices whose MAC addresses are entered in [Exception Addresses]. Communications with other devices are prohibited.
2 | Specify address exceptions. Enter the MAC address in the [Register Address] text box and click [Add]. You do not need to delimit the address with hyphens or colons. Check for entry errors If MAC addresses are incorrectly entered, you may become unable to access the machine from the Remote UI, in which case you need to set <Address Filter> to <Off>. Address Filter When [Reject] is selected for an outbound filter Outgoing multicast and broadcast packets cannot be filtered. Deleting a MAC address from exceptions Select a MAC address and click [Delete].
3 | Click [OK].

6
Perform a hard reset.
Click [Device Control], select [Hard Reset], and then click [Execute].
The settings are enabled after the hard reset is performed.

##### Using the operation panel You can also enable or disable MAC address filtering from the setting menu of the operation panel. Address Filter

LINKS
Specifying IP Addresses for Firewall Rules
101K-044