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ZyAIR Wireless Gateway Series User’s Guide
Filter and Firewall Configuration 24-3
You can apply up to four filter sets to a particular port to block various types of packets. Because each filter
set can have up to six rules, you can have a maximum of 24 rules active for a single port.
For incoming packets, your ZyAIR applies data filters only. Packets are processed depending on whether a
match is found. The following sections describe how to configure filter sets.
The Filter Structure of the ZyAIR
A filter set consists of one or more filter rules. Usually, you would group related rules, for example, all the
rules for NetBIOS, into a single set and give it a descriptive name. You can configure up to twelve filter
sets with six rules in each set, for a total of 72 filter rules in the system.
24.2 Configuring a Filter Set
To configure a filter set, follow the steps shown next.
Step 1. Enter 21 from the main menu.
Step 2. Enter 1 to display Menu 21.1 – Filter Set Configuration.
Figure 24-3 Menu 21.1 Filter Set Configuration
Step 3. Type the filter set to configure (no. 1 to 12) and press [ENTER]
.
Step 4. Type a descriptive name or comment in the Comments field and press [ENTER].
Step 5. Press [ENTER] at the message
“Press ENTER to confirm…” to display Menu 21.1.1 – Filter
Rules Summary (that is, if you selected filter set 1 in menu 21.1).
The following figures show the summary of three filter sets of your ZyAIR.
Menu 21.1 - Filter Set Configuration
Filter Filter
Set # Comments Set # Comments
------ ----------------- ------ -----------------
1 NetBIOS_WAN 7 _______________
2 NetBIOS_LAN 8 _______________
3 TEL_FTP_WEB_WAN 9 _______________
4 _______________ 10 _______________
5 _______________ 11 _______________
6 _______________ 12 _______________
Enter Filter Set Number to Confi
g
ure= 0