ZyWALL 5/35/70 Series User’s Guide

 

Table 126 NAT Overview (continued)

 

 

 

 

LABEL

DESCRIPTION

 

 

 

 

WAN 1, 2

 

 

 

 

 

Enable NAT

Select this check box to turn on the NAT feature for the WAN port. Clear this check

 

 

box to turn off the NAT feature for the WAN port.

 

Address

Select SUA to have the ZyWALL use its permanent, pre-defined NAT address

 

Mapping Rules

mapping rules.

 

 

Select Full Feature to have the ZyWALL use the address mapping rules that you

 

 

configure. This is the equivalent of what used to be called full feature NAT.

 

 

The bar displays how many of the ZyWALL's possible address mapping rules are

 

 

configured. The first number shows how many address mapping rules are configured

 

 

on the ZyWALL. The second number shows the maximum number of address

 

 

mapping rules that can be configured on the ZyWALL.

 

Port Forwarding

The bar displays how many of the ZyWALL's possible port forwarding rules are

 

Rules

configured. The first number shows how many port forwarding rules are configured

 

 

on the ZyWALL. The second number shows the maximum number of port forwarding

 

 

rules that can be configured on the ZyWALL.

 

Port Triggering

The bar displays how many of the ZyWALL's possible trigger port rules are

 

Rules

configured. The first number shows how many trigger port rules are configured on

 

 

the ZyWALL. The second number shows the maximum number of trigger port rules

 

 

that can be configured on the ZyWALL.

 

Copy to WAN 2

Click Copy to WAN 2 (or Copy to WAN 1) to duplicate this WAN port's NAT port

 

(and Copy to

forwarding or trigger port rules on the other WAN port.

 

WAN 1)

 

 

 

Note: Using the copy button overwrites the other WAN port's existing

 

 

rules.

 

 

The copy button is best suited for initial NAT configuration where you have

 

 

configured NAT port forwarding or trigger port rules for one port and want to use

 

 

similar rules for the other WAN port. You can use the other NAT screens to edit the

 

 

NAT rules after you copy them from one WAN port to the other.

 

Apply

Click Apply to save your changes back to the ZyWALL.

 

 

 

 

Reset

Click Reset to begin configuring this screen afresh.

 

 

 

22.4 NAT Address Mapping

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 old rules 5, 6 and 7 become new rules 4, 5 and 6.

To change your ZyWALL’s address mapping settings, click ADVANCED, NAT and then the Address Mapping tab. The screen appears as shown (some of the screen’s blank rows are not shown). Not all fields are available on all models.

Chapter 22 Network Address Translation (NAT)

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