Filter Types And Nat - ZyXEL Communications P-792H User Manual

When you press [ENTER] to confirm, you will see the following screen. Note that
there is only one filter rule in this set.
Figure 184 Example Filter Rules Summary: Menu 21.1.3
# A Type
- - ---- --------------------------------------------------------------- -
1 Y IP Pr=6, SA=0.0.0.0, DA=0.0.0.0, DP=23
2 N
3 N
4 N
5 N
6 N
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).
After you've created the filter set, you must apply it.
Enter 11 from the main menu to go to menu 11.
1
Enter 1 or 2 to open Menu 11.x - Remote Node Profile.
2
Go to the Edit Filter Sets field, press [SPACE BAR] to select Yes and press
3
[ENTER].
This brings you to menu 11.1.4. Apply a filter set (our example filter set 3) as
4
shown in Figure 146 on page
Press [ENTER] to confirm after you enter the set numbers and to leave menu
5
11.1.4.

32.4 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
P-792H v2 User's Guide
Menu 21.1.3 - Filter Rules Summary
Filter Rules
313.
Chapter 32 Filter Configuration
M m n
N D F
351