Prestige 782R G.SHDSL Router

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 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.

Two hexadecimal digits represent a byte, so if the length is 4, the value in either

field will take 8 digits, e.g., FFFFFFFF.

To configure a generic rule select an empty filter set in menu 21, for eg., 5. Select the Generic Filter Rule in the Filter Type field and press [ENTER] to open Menu 21.5.1 – Generic Filter Rule, as shown in the following figure.

Menu 21.5.1 - 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

Log= None

Action

Matched= Check Next Rule

Action

Not Matched= Check Next Rule

Press ENTER to Confirm or ESC to Cancel:

Press Space Bar to Toggle.

Figure 8-8 Menu 21.1.1 – Generic Filter Rule

The next table describes the fields in the Generic Filter Rule menu.

8-10

Filter Configuration