ZyXEL Communications Prestige 1600 - Manual (Page 87)

Prestige 1600 Universal Access Concentrator
Filter Configuration 10-5
Abbreviations Description Display
[F] means to forward the packet
immediately and skip checking the
remaining rules if any.
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 if any.
[F] means to forward the
packet.
[D] means to drop the
packet.
[N] means check the next
rule.
The protocol dependent filter rules abbreviation are listed as follows:
If the filter type is IP, the following abbreviations listed in the following table will be used.
Table 10-2 Abbreviations Used If Filter Type Is IP
Abbreviation Description
Pr Protocol
SA Source Address
SP Source Port number
DA Destination Address
DP Destination Port number
If the filter type is Dev (device), the following abbreviations listed in the following table will be used.
Table 10-3 Abbreviations Used If Filter Type Is Dev
Abbreviation Description
Off Offset
Len Length
Refer to the next section for information on configuring the filter rules.
10.4 Configuring a Filter Rule
To configure a filter rule, enter its number in Menu 21.1 - Filter Rules Summary and press [ENTER] to open
Menu 21.1.1 for the rule.
10.5 Filter Types and NAT
There are two classes of filter rules, Generic Filter (Device) rules and Protocol Filter (TCP/IP) rules. Generic
Filter rules act on the raw data from/to LAN and WAN. Protocol Filter rules act on the IP packets. Generic and
TCP/IP filter rules are discussed in more detail in the next section. When NAT (Network Address Translation) is