Filter Types And Nat - Nortel Contivity 221 User Manual

Figure 27-11 Example Filter Rules Summary: Menu 21.1.3
Menu 21.1.3 - Filter Rules Summary
# 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).
After you've created the filter set, you must apply it.
Enter 11 from the main menu to go to menu 11.
Step 1.
Go to the Edit Filter Sets field, press [SPACE BAR] to select Yes and press
Step 2.
[ENTER].
This brings you to menu 11.5. Apply a filter set (our example filter set 3) as shown in
Step 3.
Figure 27-14.
Press [ENTER] to confirm after you enter the set numbers and to leave menu 11.5.
Step 4.

Filter Types and NAT

27.4
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
Filter Rules
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).
Contivity 221 VPN Switch User's Guide
Filter Configuration 27-15
M m n
N D F
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Deleted: Figure 27-14
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