ZyXEL Communications Intelligent Broadband Sharing Gateway P-324 - Manual (Page 173)

Prestige 324 Intelligent Broadband Sharing Gateway
Filter Configuration 13-15
Figure 13-11 Example Filter Rules Summary — Menu 21.3
Enter 2 in the above menu to configure the second rule. Configure this filter rule with port number as 23
(Telnet) as shown in the next screen (after you press [ENTER] to confirm.
Menu 21.7 - 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=21 N D N
2 N
4 N
5 N
6 N
Enter Filter Rule Number (1-6) to Configure: 2
This shows you that you have
configured and activated (A = Y) a
TCP/IP filter rule (Type = IP, Pr = 6)
for destination FTP ports (DP = 21).
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 = N) if the action is not matched
and there are more rules to be checked (there is
one more in this example).