ZyXEL Communications Prestige 642, Руководство пользователя

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Prestige 642 ADSL Modem
5-8 SNMP Configuration
Figure 5-5 Example Filter – Menu 21.1.1
When you press [ENTER] to confirm, you will see the following screen. Note that there is only one filter
rule in this set.
Menu 21.1.1 - Generic Filter Rule
Filter #: 1,1
Active= Yes
Offset= 128
Length= 4
Mask= 789abcde
Value= 789abcde
More= No Log= Action Matched
Action Matched= Forward
Action Not Matched= Drop
Press ENTER to Confirm or ESC to Cancel:
Select Yes to make the rule
active.
This is the first byte of the data
portion in the packet that you
want to compare.
This is the length (in bytes) of
the data portion in the packet
that you want to compare.
The Mask is applied to the data
portion before comparing the
result against the Value to
determine a match. It is
specified in hexadecimal, and it
takes two hexadecimal digits to
represent a byte i.e., Length is
4, therefore there are 8 hex
numbers.
There are no more
rules to check in this
filter set.
Select Forward here so that
the packet will be forwarded
if the action is matched.
This setting logs all packets that
match these rule parameters.
Select Drop here
so that the packet
will be dropped
if the action is
not matched.
Enter the value (in hex) to
compare with the data portion.