ZyXEL ZyWALL 2WG User Guide - Page 526
Ordering Your Rules
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Chapter 36 Network Address Translation (NAT) Figure 345 Menu 15.1.1: First Set Menu 15.1.1 - Address Mapping Rules Set Name= NAT_SET Idx Local Start IP Local End IP Global Start IP Global End IP Type 1. 0.0.0.0 255.255.255.255 0.0.0.0 M-1 2. 0.0.0.0 Server 3. 4. 5. 6. 7. 8. 9. 10. Action= None Select Rule= N/A Press ENTER to Confirm or ESC to Cancel: " The Type, Local and Global Start/End IPs are configured in menu 15.1.1.1 (described later) and the values are displayed here. 36.2.1.3 Ordering Your Rules Ordering your rules is important because the ZyWALL applies the rules in the order that you specify. When a rule matches the current packet, the ZyWALL 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. Table 192 Fields in Menu 15.1.1 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. 526 ZyWALL 2 Plus User's Guide