Example filter, 3 example filter – ZyXEL Communications Prestige 642 User Manual

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Prestige 642 ADSL Internet Access Router

Filter Configuration

8-17

8.3 Example

Filter

Let’s look at the third default ZyXEL filter, TELNET_WAN (see Figure 8-6) as an example. Please see our
PNC Disk for more example filters. This filter is designed to block outside users telnetting into the Prestige.

Figure 8-12

Telnet Filter Example

Step 1.

Enter 21 from the Main Menu to open Menu 21 - Filter Set Configuration.

Step 2.

Enter the index of the filter set you wish to configure (in this case, 3) and press [ENTER]

Step 3.

Enter a descriptive name or comment in the Edit Comments field (in this case TELNET_WAN)
and press [ENTER].

Step 4.

Press [ENTER] at the message: [Press ENTER to confirm] to open Menu 21.3 - Filter Rules
Summary

Step 5.

Enter 1 to configure the first filter rule (the only filter rule of this set). Make the entries in this
menu as shown in the following figure.