ZyXEL P-314Plus User Guide - Page 118

Prestige 314 PLUS Broadband Sharing Gateway with 4-Port Switch 7.2.4 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, e.g., FFFFFFFF. To configure a generic rule, select Generic Filter Rule in the Filter Type field in the menu 21.4.1 and press [ENTER] to open Menu 21.4.1 - Generic Filter Rule, as shown below. Menu 21.4.1 - 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: Press Space Bar to Toggle. Figure 7-10 Menu 21.4.1 - Generic Filter Rule The following table describes the fields in the Generic Filter Rule Menu. Field Filter # Table 7-4 Generic Filter Rule Menu Fields Description 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. EXAMPLE 7-12 Filter Configuration