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ZyWALL 2 Series User’s Guide
8-8 NAT
Table 8-4 SUA Server
LABEL DESCRIPTION
Default Server In addition to the servers for specified services, NAT supports a default server. A
default server receives packets from ports that are not specified in this screen. If you do
not assign a default server IP address, then all packets received for ports not specified
in this screen will be discarded.
# Number of an individual SUA server entry.
Active Select this check box to enable the SUA server entry. Clear this checkbox to disallow
forwarding of these ports to an inside server without having to delete the entry.
Name Enter a name to identify this port-forwarding rule.
Start Port
End Port
Enter a port number here. To forward only one port, enter it again in the End Port field.
To specify a range of ports, enter the last port to be forwarded in the End Port No field
Server IP
Address
Enter the inside IP address of the server here.
Apply
Click Apply to save your changes back to the ZyWALL.
Reset
Click Reset to begin configuring this screen afresh.
8.5 Configuring 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 SUA/NAT, then the Address Mapping tab.
The screen appears as shown.