Netgear RT338 참조 가이드

Reference Guide for the Model RT338 ISDN Router

Configuring Filters

9-11

Implementing the Filter

Now you can proceed to define a call filter to block the three NetBIOS service ports.

To define a call filter:

Go to Menu 21 - Filter Set Configuration

(Figure 9-5)

, and choose a name and filter set.

Figure 9-5.

Menu 21 - Filter Set Configuration

Next, define the filter rules.

You want your filter to ignore (drop) UDP and TCP packets originating from ports 137, 138,
and 139. Because each protocol/port combination must be specified as a separate rule, there
are six rules. Each filter set contains six rules, so you fill one entire set. Begin with rule 1, as
illustrated in

Figure 9-5

Menu 21 - Filter Set Configuration

Filter Filter

Set # Comments Set # Comments

------ ----------------- ------ -----------------

1 netbios 7 _______________

2 _______________ 8 _______________

3 _______________ 9 _______________

4 _______________ 10 _______________

5 _______________ 11 _______________

6 _______________ 12 _______________

Enter Filter Set Number to Configure= 1

Edit Comments= netbios

Press ENTER to Confirm or ESC to Cancel: