Router Filter Structure; Configuring A Filter Set; Figure 9-2. Menu 21 - Filter Set Configuration - NETGEAR RT338 Reference Manual

Reference Guide for the Model RT338 ISDN Router

Router Filter Structure

You can configure up to 12 filter sets, each with up to six rules. For IP packets, these rules involve
comparing the protocol type of a data packet (for example, TCP, UDP), source or destination
address, or port number. Also, a generic filter may be defined to merely test for a byte or pattern of
bytes in a particular location in the packet. When a rule is met (or not met), a user-specified action
is taken. This action may be to forward the packet, drop the packet, or go to the next rule.
When implementing these filter sets, you can link up to four of the filter sets to screen the data
packet. Therefore, with each filter set having up to six rules, you can have a maximum of 24 rules
active for a single filtering application.

Configuring a Filter Set

To configure a filter set:
From the Manager Interface Main Menu, enter 21 to open Menu 21 - Filter Set
1.
Configuration as shown in
From this menu, you can choose from 12 filter sets.
Filter
Set # Comments
------ -----------------
1 $netbeui
2 NetBIOS LAN
3 _______________
4 _______________
5 _______________
6 _______________
Figure 9-2. Menu 21 - Filter Set Configuration
9-2
Figure 9-2.
Menu 21 - Filter Set Configuration
Enter Filter Set Number to Configure= 0
Edit Comments=
Press ENTER to Confirm or ESC to Cancel:
Filter
Set # Comments
------ -----------------
7 _______________
8 _______________
9 _______________
10 _______________
11 _______________
12 _______________
Configuring Filters