Generic Filter Rule; Figure 28-13 Generic Filter Rule - ZyXEL Communications Prestige 792H User Manual

Prestige 792H User's Guide

28.3.2 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 7. Select Generic Filter
Rule in the Filter Type field and press [ENTER] to open Menu 21.5.1
the following figure.
Press Space Bar to Toggle.
28-14
Menu 21.7.1 - Generic Filter Rule
Filter #: 7,1
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:

Figure 28-13 Generic Filter Rule

Generic Filter Rule, as shown in
–
Filter Configuration