ZyXEL Communications 70 Series User Manual

ZyWALL 5/35/70 Series User’s Guide

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Chapter 28 UPnP

The following table describes the labels in this screen.  

This section shows how to install UPnP in Windows Me and Windows XP.  

Table 162   UPnP Ports 

Reserve UPnP 

NAT rules in flash 

after system 

bootup

Select this check box to have the ZyWALL retain UPnP created NAT rules even 

after restarting. If you use UPnP and you set a port on your computer to be fixed for 

a specific service (for example FTP for file transfers), this option allows the 

ZyWALL to keep a record when your computer uses UPnP to create a NAT 

forwarding rule for that service. 

WAN Interface in 

Use

This field displays through which WAN port the ZyWALL is currently sending out 

traffic from UPnP-enabled applications. This field displays None when UPnP is 

disabled or neither of the WAN ports has a connection.

The following read-only table displays information about the UPnP-created NAT mapping rule entries in 

the ZyWALL’s NAT routing table.

#

This is the index number of the UPnP-created NAT mapping rule entry.

Remote Host

This field displays the source IP address (on the WAN) of inbound IP packets. 

Since this is often a wildcard, the field may be blank. When the field is blank, the 

ZyWALL forwards all traffic sent to the External Port on the WAN interface to the 

Internal Client on the Internal Port. When this field displays an external IP 

address, the NAT rule has the ZyWALL forward inbound packets to the Internal 

Client from that IP address only. 

External Port

This field displays the port number that the ZyWALL “listens” on (on the WAN port) 

for connection requests destined for the NAT rule’s Internal Port and Internal 

Client. The ZyWALL forwards incoming packets (from the WAN) with this port 

number to the Internal Client on the Internal Port (on the LAN). If the field 

displays “0”, the ZyWALL ignores the Internal Port value and forwards requests on 

all external port numbers (that are otherwise unmapped) to the Internal Client.

Protocol

This field displays the protocol of the NAT mapping rule (TCP or UDP). 

Internal Port

This field displays the port number on the Internal Client to which the ZyWALL 

should forward incoming connection requests.

Internal Client

This field displays the DNS host name or IP address of a client on the LAN. Multiple 

NAT clients can use a single port simultaneously if the internal client field is set to 

255.255.255.255 for UDP mappings.

Enabled

This field displays whether or not this UPnP-created NAT mapping rule is turned 

on. The UPnP-enabled device that connected to the ZyWALL and configured the 

UPnP-created NAT mapping rule on the ZyWALL determines whether or not the 

rule is enabled.

Description

This field displays a text explanation of the NAT mapping rule. 

Lease Duration

This field displays a dynamic port-mapping rule’s time to live (in seconds). It 

displays “0” if the port mapping is static.

Apply

Click Apply to save your changes back to the ZyWALL.

Refresh

Click Refresh update the screen’s table.