ZyXEL Communications ADSL2+ Ethernet/USB Gateway 660RU-Tx Series - Manual (Page 168)

Prestige 660RU-Tx Series User’s Guide
167 Chapter 21 Network Address Translation (NAT)
21.3.1.3 Ordering Your Rules
Ordering your rules is important because the Prestige applies the rules in the order that you
specify. When a rule matches the current packet, the Prestige 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.
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.
Table 51 Menu 15.1.1 First Set
FIELD DESCRIPTION
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 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.
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.
Note: An End IP address must be numerically greater than its
corresponding IP Start address.