ZyXEL Communications Prestige 128IMH, Руководство пользователя, Страница: 100 / 142

ZyXEL Prestige 128IMH User’s Guide
Page 12-8
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Figure 12-1 Menu 21.1.1 - Generic Filter Rule
Field Description
Offset Offset refers to the value of the byte that you want to use as your starting offset.
That is, in the data packet, at what point do you want to begin the comparison.
The range for this field is from 0 to 255. Default = 0
Length This field refers to the length (in bytes) of the data in the packet that the Prestige
should use for comparison and masking. The starting point of this data is
determined by Offset. The range for this field is 0 to 8. Default = 0
Mask In this field, specify (in Hex) the value that the Prestige should logically qualify
[and] the data in the packet. Since Length is given in bytes, you need to enter
twice the length hex numbers for this field. For example, if Length were ‘ 4’ , then
a valid Mask must have 8 hexadecimal numbers, like ‘ 1155ABF8’ .
Value In this field, specify (in Hex) the value that the Prestige should use to compare
with the masked packet. The value should align with Offset. Since Length is
given in bytes, you need to enter twice the length hex numbers for this field. For
example, if Length were ‘ 4’ , then a valid Value must have 8 hexadecimal
numbers, like ‘ 1155ABF8’ . If the result from the masked packet matches Value,
then the packet is considered matched.
Table 12-1 Fields in Menu 21.1.1 - Generic Filter Rule
Once you have completed filling in Menu 21.1.1 - Generic Filter Rule, press ENTER at
the message: ‘Press ENTER to Confirm ...’ to save your configuration or press ESC at any
time to cancel. This data will now be displayed on Menu 21.1 - Filter Rules Summary.
Menu 21.3.1 - Generic Filter Rule
Filter #: 3,1
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.