ZyXEL Communications P-334W User Manual

Prestige 334W User’s Guide 

Filter Configuration 

 

30-11 

 This section shows you how to configure a generic filter rule. The purpose of generic rules is to allow you to 
filter non-IP packets. For IP, it is generally easier to use the IP rules directly. 

For generic rules, the Prestige treats a packet as a byte stream as opposed to an IP or IPX packet. You specify 
the portion of the packet to check with the Offset (from 0) and the Length fields, both in bytes. The Prestige 
applies the Mask (bit-wise ANDing) to the data portion before comparing the result against the Value to 
determine a match. The Mask and Value are specified in hexadecimal numbers. Note that it takes two 
hexadecimal digits to represent a byte, so if the length is 4, the value in either field will take 8 digits, for 
example, FFFFFFFF. 

To configure a generic rule, select Generic Filter Rule in the Filter Type field in menu 21.1.4.1 and press 
[ENTER] to open Generic Filter Rule, as shown below. 

 

 

 

 

 

 

 

The following table describes the fields in the Generic Filter Rule menu. 

Filter # 

This is the filter set, filter rule co-ordinates, i.e., 2,3 refers to the second 
filter set and the third rule of that set. 

 

 
              Menu 21.1.4.1 - Generic Filter Rule 
 
         Filter #: 4,1 
         Filter Type= Generic Filter Rule 
         Active= No 
         Offset= 0 
         Length= 0 
         Mask= N/A 
         Value= N/A 
         More= No           Log= None 
         Action Matched= Check Next Rule 
         Action Not Matched= Check Next Rule 
 
 

         Press ENTER to Confirm or ESC to Cancel: