ZyXEL Communications Prestige 642M series, User Manual

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Prestige 642M Series ADSL Bridge
Filter Configuration 5-5
Abbreviations Description Display
[N] means you can now specify an
action to be taken i.e., forward the
packet, drop the packet or check the next
rule. For the latter, the next rule is
independent of the rule just checked.
If More is
Yes , then Action Matched
and Action Not Matched will be N/A .
m Refers to Action Matched .
[F] means to forward the packet
immediately and skip checking the
remaining rules.
[F] means to forward the packet.
[D] means to drop the packet.
[N] means check the next rule.
n Refers to Action Not Matched.
[F] means to forward the packet
immediately and skip checking the
remaining rules.
[F] means to forward the packet.
[D] means to drop the packet.
[N] means check the next rule.
The protocol dependent filter rules abbreviations are listed as follows:
z If the filter type is GEN (generic, i.e., device), then the abbreviations listed in the following table are
used.
Table 5-2 Abbreviations Used if Filter Type Is GEN
Abbreviation Description
Off Offset
Len Length
Refer to the next section for information on configuring filter rules.
5.3 Configuring a Filter Rule
To configure a filter rule, enter its number in Menu 21.1 - Filter Rules Summary and press [Enter].
There is one type of filter rule, Device for the P642M ADSL Bridge.
5.3.1 Generic Filter Rule
This section shows you how to configure a generic filter rule.
For generic rules, the Prestige treats a packet as a byte stream. 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