ZyXEL Communications 782M Manuale Utente

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P782M G.SHDSL Bridge 
Table 6-2 Rule Abbreviations Used 
FILTER TYPE 
DESCRIPTION 
GEN  
Off Offset 
Len Length 
6.3  Generic Filter Rule  
The purpose of generic rules is to allow you to filter non-IP packets. For generic rules, the Prestige treats a 
packet as a byte stream as opposed to an IP 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. 
Two hexadecimal digits represent a byte, so if the length is 4, the value in either field will take 8 digits, e.g., 
FFFFFFFF. 
6.3.1  Example Generic Filter Rule Configuration 
Step 1. 
Type a filter set number in Menu 21 — Filter Set Configuration, (“5” in this example), and 
press [ENTER] to display menu 21.5. 
Step 2. 
Type a filter rule number in Menu 21.5 — Filter Rules Summary, (“1” in this example), and 
press [ENTER] to display Menu 21.5.1 — Generic Filter Rule (shown next). 
Menu 21.5.1 - Generic Filter Rule 
 
Filter #: 5,1 
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: 
 
Press Space Bar to Toggle. 
Figure 6-5 Menu 21.5.1 
 Generic Filter Rule 
The table, shown next, describes the fields in Menu 21.5.1 
 Generic Filter Rule
6-6 
 
Filter Set Configuration