- NetComm Modem Router User Guide

Advanced
NetComm NB5 Ethernet/USB Modem Router YML717 Rev1
58 www.netcomm.com.au
Create MAC Filter Rules
Enter the Source MAC and Destination MAC details. Entering zeros or
blanks into the Source or Destination fields enters a null value.
'Protocol' provides the choice of protocol type for the rule.
'Mode' provides the choice of Allow or Deny for the rule.
When all selections are made, click on Add to add the rule to the list of
rules. A maximum of 20 MAC Filter Rules can be defined and saved.
To save changes, click on Save Settings on the left-hand menu.
Edit or Delete MAC Filter Rules
To edit an existing MAC Filter Rule, click the radio button adjacent to the Filter Rule name. The
Rule will then appear in the top half of the MAC Filter control screen where it can be edited. When
editing is complete, click 'Add' to return the Rule to the list of existing rules.
To delete MAC Filter Rules, click on the 'Delete' tick box; multiple deletions can be made by shift-
clicking Delete tick boxes; Select All will select every rule. When the desired selections are made,
effect deletion by clicking on Apply.
To save changes, click on Save Settings on the left-hand menu.
Hidden MAC Filter Rules
The MAC filter table contains three hidden rules. These rules are built into the Router to ensure the
user does not become locked out by entering a rule which prevents further access to the router.
The first rule allows any and all ARP frames through the system.
The second rule allows all IPv4 frames with the destination MAC address of the bridge to go
through.
The third rule allows all IPv4 frames with the source MAC address of the bridge to go through.
TIP: To find the MAC address of a Windows-based computer, at the DOS prompt type: ipconfig /all.