Implementing The Filter - NETGEAR RM356 - Router - EN Reference Manual

Implementing the Filter

Now you can proceed to define a call filter to block the three NetBIOS service ports.
The Filter Set Configuration Menu is shown in Figure 8-3.
To define a call filter:
Go to Menu 21 - Filter Set Configuration, and choose a name and filter set.
1.
Menu 21 - Filter Set Configuration
Filter
Set # Comments
------ -----------------
1 netbios
2 _______________
3 _______________
4 _______________
5 _______________
6 _______________
Press ENTER to Confirm or ESC to Cancel:
Figure 8-3. Menu 21 Filter Set Configuration
Next, define the filter rules.
2.
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
will be six rules. Each filter set contains six rules, so you will fill one entire set. Begin with
rule 1, as illustrated in
Filter Configuration
Enter Filter Set Number to Configure= 1
Edit Comments= netbios
Figure 8-3.
Reference Guide for the Model RM356 Modem Router
Filter
Set # Comments
------ -----------------
7 _______________
8 _______________
9 _______________
10 _______________
11 _______________
12 _______________
8-11