ZyXEL Communications P-334W User Manual

Prestige 334W User’s Guide 

Filter Configuration 

 

30-15 

 

 

 

 

 

 

 

 

 

 

 

 

After you’ve created the filter set, you must apply it.  

Step 1.  Enter 11 from the main menu to go to menu 11. 

Step 2.  Go to the Edit Filter Sets field, press [SPACE BAR] to select Yes and press [ENTER]. 

Step 3.  This brings you to menu 11.5. Apply a filter set (our example filter set 3) as shown in Figure 

30-14. 

Step 4.  Press [ENTER] to confirm after you enter the set numbers and to leave menu 11.5. 

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. 

 
                        Menu 21.1.3 - 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: 

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).