Figure 19-2 Upnp Ports; Table 19-2 Upnp Ports - ZyXEL Communications ZyWALL 5 User Manual

The following table describes the labels in this screen.
LABEL
Reserve UPnP Select this checkbox to have the ZyWALL retain UPnP created NAT rules even after
NAT rules in flash restarting. If you use UPnP and you set a port on your computer to be fixed for a specific
after system service (for example FTP for file transfers), this option allows the ZyWALL to keep a
bootup 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.
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.
UPnP

Figure 19-2 UPnP Ports

Table 19-2 UPnP Ports

DESCRIPTION
ZyWALL 5 Internet Security Appliance
19-3