Generic Filter Rule - ZyXEL Communications Prestige 650R-31/33 User Manual

8.3.2 Generic Filter Rule

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 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 fields 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 an empty filter set in menu 21, for example 6. Select Generic Filter
Rule in the Filter Type field and press [ENTER] to open Menu 21.6.1
the following figure.
The next table describes the fields in the Generic Filter Rule menu.
Filter Configuration
Menu 21.6.1 - 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
Action Matched= Check Next Rule
Action Not Matched= Check Next Rule
Press ENTER to Confirm or ESC to Cancel:
Figure 8-12 Menu 21.5.1
Prestige 650R-31/33 ADSL Router
Generic Filter Rule, as shown in
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Log= None
Generic Filter Rule
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