SMC Networks SMC7204BRA manual Configuring IP Filters and Blocked Protocols

CONFIGURING IP FILTERS AND BLOCKED PROTOCOLS

This section describes two Configuration Manager features that enable you to control the data passing through your network:

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The IP filter feature enables you to create rules to block attempts by certain computers on your LAN to access certain types of data or Internet locations. You can also block incoming access to computers on your LAN. Although IP filter rules provide a very flexible and powerful tool to enhance network security and control user activity, they can also be complex and generally require an advanced understanding of IP protocols.

The blocked protocols feature enables you to simply select from a predefined list the protocol that you want to block.

All data passed to the ADSL Barricade using a blocked protocol will be discarded, without consideration of the source computer, destination computer, or the device interface on which it was received.

Configuring IP Filters

When you define an IP filter rule and enable the feature, you instruct the ADSL Barricade to examine each data packet

it receives to determine whether it meets criteria set forth in the rule. The criteria can include the size of the packet, the network or internet protocol it is carrying, the direction in which it is traveling (for example, from the LAN to the Internet or vice versa), the IP address of the sending computer, the destination IP address, and other characteristics of the packet data.

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