ZyXEL 202H 91-003-194003B User Manual

P-202H Plus v2 User’s Guide

219

Chapter 23 Network Address Translation (NAT)

Ordering your rules is important because the ZyXEL Device applies the rules in the order that 
you specify. When a rule matches the current packet, the ZyXEL Device takes the 
corresponding action and the remaining rules are ignored. If there are any empty rules before 
your new configured rule, your configured rule will be pushed up by that number of empty 
rules. For example, if you have already configured rules 1 to 6 in your current set and now you 
configure rule number 9. In the set summary screen, the new rule will be rule 7, not 9. 

Now if you delete rule 4, rules 5 to 7 will be pushed up by 1 rule, so as old rule 5 becomes rule 
4, old rule 6 becomes rule 5 and old rule 7 becomes rule 6. 

Note: You must press [ENTER] at the bottom of the screen to save the whole set. You 

must do this again if you make any changes to the set – including deleting a 
rule. No changes to the set take place until this action is taken

Selecting Edit in the Action field and then selecting a rule brings up the following menu, 
Menu 15.1.1.1

 

- Address Mapping Rule in which you can edit an individual rule and 

configure the Type, Local and Global Start/End IPs.

Note: An End IP address must be numerically greater than its corresponding IP Start 

address.

Figure 117   Menu 15.1.1.1 Editing/Configuring an Individual Rule in a Set

Table 75   Menu 15.1.1 First Set

Set Name

Enter a name for this set of rules. This is a required field. If this field is left blank, the 

entire set will be deleted.

Action

The default is Edit. Edit means you want to edit a selected rule (see the following 

field). Insert Before means to insert a rule before the rule selected. The rules after the 

selected rule will then be moved down by one rule. Delete means to delete the 

selected rule and then all the rules after the selected one will be advanced one rule. 

None disables the Select Rule item.

Select Rule

When you choose Edit, Insert Before or Delete in the previous field the cursor jumps 

to this field to allow you to select the rule to apply the action in question.

Menu 15.1.1.1 Address Mapping Rule

     Type= One-to-One
     Local IP:
       Start= 0.0.0.0
       End  = N/A
     Global IP:
       Start= 0.0.0.0
       End  = N/A

Server Mapping Set= N/A

Press ENTER to Confirm or ESC to Cancel: