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                       NTU Optical Network Terminals      31 
 
–  Filter Name—filter text description; 
–  IP Version—IP protocol version; 
–  Protocol—the network protocol selected; 
–  Source MAC address—source MAC address; 
–  Source IP address[/prefix length]—source IP address (prefix length can be specified after slash); 
–  Source Port (port or port:port)—source port or port range can be specified after double point; 
–  Destination  IP  address  [/prefix  length]—destination IP  address  (prefix  length  may  be  specified  after 
slash); 
–  Destination Port (port or port:port)—destination port or port range can be specified after double point. 
 
WAN (configured in the router mode and having firewall enabled) and LAN Interfaces 
–  Select All—when checked, choose all available interfaces. 
 
Or choose an interface from the list by selecting the checkbox next to it. 
Click the Apply/Save to accept and save the settings. 
4.2.3.2   The “MAC Filtering Setup” submenu. Filtering Settings for MAC Addresses 
MAC  filtration  allows  traffic  to  be  transferred  or  blocked  depending  on  source  and  destination  MAC 
addresses.