Zoom 4420-A - Manual (Page 47)

Chapter 6. Firewall Settings 47
IP Filtering
This filter can prevent certain types of data from being sent over
the Internet to computers or other devices in the Local Area
Network.
Parameter Select or enter . . .
Enable IP Filtering Select this check box to protect computers or
other devices in the Local Area Network from
receiving unwanted Internet communication.
Local IP Address Enter the IP addresses, one at a time, of
devices that are prevented from sending data
to your LAN.
Protocol Select
• TCP (Transmission Control Protocol)
• UDP (User Datagram Protocol)
• Both
Apply Changes Click this button to add the IP address and
protocol to the Current Filter Table.
Reset If you make a mistake, click this button to
return to the defaults on this page.
Delete Selected In the Current Filter Table, click the Select
check box for one or more IP addresses and
then click this button to delete.
Delete All Click this button to clear the table.
Reset Click to clear the Select check boxes.