Chapter 8 Home Networking
LTE Series User’s Guide
139
8.5 Technical Reference
This section provides some technical background information about the topics covered in this chapter.
LANs, WANs and the Zyxel Device
The actual physical connection determines whether the Zyxel Device ports are LAN or WAN ports. There
are two separate IP networks, one inside the LAN network and the other outside the WAN network as
shown next.
Figure 94 LAN and WAN IP Addresses
Private IP Addresses
Every machine on the Internet must have a unique address. If your networks are isolated from the
Internet, for example, only between your two branch offices, you can assign any IP addresses to the
UPnP NAT-T Select Enable to activate UPnP with NAT enabled. UPnP NAT traversal automates the process
of allowing an application to operate through NAT. UPnP network devices can automatically
configure network addressing, announce their presence in the network to other UPnP devices
and enable exchange of simple product and service descriptions.
# This field displays the index number of the entry.
Description This field displays the description of the UPnP NAT-T connection.
Destination IP
Address
This field displays the IP address of the other connected UPnP-enabled device.
External Port This field displays the external port number that identifies the service.
Internal Port This field displays the internal port number that identifies the service.
Protocol This field displays the protocol of the NAT mapping rule. Choices are TCP or UDP.
Apply Click Apply to save your changes.
Cancel Click Cancel to restore your previously saved settings.
Table 44 Network Settings > Home Networking > UPnP
LABEL DESCRIPTION
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