Prestige 334 User’s Guide
263
Chapter 27 Filter Configuration
Figure 139
Executing an IP Filter
27.2.3 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.