ZyXEL Communications Prestige 643, Руководство пользователя

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Prestige 643 ADSL Router
Filter Configuration 8-19
Figure 8-15 Example Filter Rules Summary - Menu 21.3
After you’ve created the filter set, you must apply it.
Step 1. Enter 11 from the main menu to display Menu 11.
Step 2. Go to the Edit Filter Sets field. Press [SPACE BAR] to change No to Yes and press
[ENTER]
to display Menu 11.5.
Step 3. Apply the TELNET_WAN filter set (filter set 3) as shown in the Filtering Remote Node Traffic
(PPPoE Encapsulation) figure.
Step 4.
Press
[ENTER]
to confirm after you enter the set numbers and to leave Menu 11.5.
8.4 Filter Types and SUA
There are two types of filter rules, Device Filter (Generic) rules and Protocol Filter (TCP/IP and IPX) rules.
Device Filter rules act on the raw data from/to LAN and WAN. Protocol Filter
rules act on the IP and IPX
packets. When NAT/SUA (Network Address Translation/Single User Account) is enabled, the inside IP
Menu 21.3 - Filter Rules Summary
# A Type Filter Rules M m n
- - ---- --------------------------------------------------------------- - - -
1 Y IP Pr=6, SA=0.0.0.0, DA=0.0.0.0, DP=23 N D F
2 N
3 N
4 N
5 N
6 N
Enter Filter Rule Number (1-6) to Configure: 1
This shows you that you have
configured and activated (
A =
Y ) a TCP/IP filter rule ( Type =
IP , Pr = 6 ) for destination
telnet ports ( DP = 23 ).
M = N means an action can be taken
immediately. The action is to drop the
packet (
m = D ) if the action is matched and
to forward the packet immediately ( n = F ) if
the action is not matched no matter whether
there are more rules to be checked (there
aren’t in this example).