ZyAIR B-2000 Wireless LAN Gateway with 4-Port Switch

filters are applied to the raw packets that appear on the wire. They are applied at the point where the ZyAIR is receiving and sending the packets; for instance, the interface. The interface can be an Ethernet, or any other hardware port. The following figure illustrates this.

Figure 7-10 Protocol and Device Filter Sets

7.5Example Filter

Let’s look at an example to block outside users from telnetting into the ZyAIR.

Figure 7-11 Sample Telnet Filter

Step 1. Enter 21 from the main menu to open Menu 21 – Filter Set Configuration. Step 2. Enter the index number of the filter set you want to configure (in this example, 3).

Filter Configuration

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