ZyXEL Communications 2 Plus 22.3 Displaying UPnP Port Mapping

Chapter 22 UPnP

Table 128 ADVANCED > UPnP

LABEL	DESCRIPTION
Apply	Click Apply to save your changes back to the ZyWALL.

Reset	Click Reset to begin configuring this screen afresh.

Click ADVANCED > UPnP > Ports to display the UPnP Ports screen. Use this screen to view the NAT port mapping rules that UPnP creates on the ZyWALL.

Figure 266 ADVANCED > UPnP > Ports

The following table describes the labels in this screen.

Table 129 ADVANCED > UPnP > Ports

LABEL	DESCRIPTION
Reserve UPnP	Select this check box to have the ZyWALL retain UPnP created NAT rules even
NAT rules in flash	after restarting. If you use UPnP and you set a port on your computer to be fixed
after system	for a specific service (for example FTP for file transfers), this option allows the
bootup	ZyWALL to keep a record when your computer uses UPnP to create a NAT
	forwarding rule for that service.

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.