ZyXEL g-2000 plusv2 用户指南

ZyXEL G-2000 Plus v2 User’s Guide

Chapter 8 Single User Account (SUA) / Network Address Translation (NAT)

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Ordering your rules is important because the ZyXEL device applies the rules in the order that 
you specify. When a rule matches the current packet, the ZyXEL device 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 ZyXEL device’s Address Mapping settings, click SUA/NAT, then the 
Address Mapping tab.  The screen appears as shown.

Table 41   SUA/NAT Setup

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, the ZyXEL device discards all 

packets received for ports that are not specified in this screen or remote 

management.

#

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

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 

field.

End Port

Server IP 

Address

Enter the inside IP address of the server here.

Apply

Click Apply to save your changes back to the ZyXEL device.

Reset

Click Reset to begin configuring this screen afresh.