ZyXEL Communications Wireless Gateway Series 사용자 설명서

ZyAIR Wireless Gateway Series User’s Guide 

24-6 

 Filter and Firewall Configuration 

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To configure a filter rule, type its number in Menu 21.1.1 – Filter Rules Summary and press [ENTER] to 
open menu 21.1.1.x for the rule. 

There are two types of filter rules: TCP/IP and Generic. Depending on the type of rule, the parameters for 
each type will be different. Use [SPACE BAR] to select the type of rule that you want to create in the 
Filter Type field and press [ENTER] to open the respective menu. 

To speed up filtering, all rules in a filter set must be of the same class, for instance, protocol filters or 
generic filters. The class of a filter set is determined by the first rule that you create. When applying the 
filter sets to a port, separate menu fields are provided for protocol and device filter sets. If you include a 
protocol filter set in a device filters field or vice versa, the ZyAIR will warn you and will not allow you to 
save. 

This section shows you how to configure a TCP/IP filter rule. TCP/IP rules allow you to base the rule on 
the fields in the IP and the upper layer protocol, for example, UDP and TCP headers. 

To configure TCP/IP rules, select TCP/IP Filter Rule from the Filter Type field and press [ENTER] to 
open Menu 21.1.1.1 – TCP/IP Filter Rule, as shown next.