ZyXEL Communications P-324, User Manual

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Prestige 324 User’s Guide
Filter Configuration 23-11
23.2.3 Configuring a 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 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.
Figure 23-8 Menu 21.1.4.1 Generic Filter Rule
The following table describes the fields in the Generic Filter Rule menu.
Table 23-4 Generic Filter Rule Menu Fields
FIELD DESCRIPTION OPTIONS
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: