Generic Filter Rule; Example Generic Filter Rule Configuration; Table 5-2 Rule Abbreviations Used - ZyXEL Communications Prestige 650M-17 User Manual

5.3

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.

5.3.1 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).
Press Space Bar to Toggle.
The table, shown next, describes the fields in Menu 21.5.1
Filter Set Configuration

Table 5-2 Rule Abbreviations Used

FILTER TYPE
GEN
Off Offset
Len Length
Menu 21.5.1 - Generic Filter Rule
Filter #: 5,1
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 5-5 Menu 21.5.1
Prestige 650M-17 ADSL Modem
DESCRIPTION
Log= None
Generic Filter Rule
–
Generic Filter Rule.
–
5-5