ZyXEL Communications Internet Security Appliance ZyWALL5UTM 4.0 - Manual (Page 376)

ZyWALL 5/35/70 Series User’s Guide
Chapter 22 Network Address Translation (NAT) 376
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.
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
Mapping Rules
Select SUA to have the ZyWALL use its permanent, pre-defined NAT address
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
Rules
The bar displays how many of the ZyWALL's possible port forwarding rules are
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
Rules
The bar displays how many of the ZyWALL's possible trigger port rules are
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
(and Copy to
WAN 1)
Click Copy to WAN 2 (or Copy to WAN 1) to duplicate this WAN port's NAT port
forwarding or trigger port rules on the other WAN port.
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.
Table 126 NAT Overview (continued)
LABEL DESCRIPTION