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• Assigning lease times to mappings
Windows Messenger is an example of an application that supports NAT traversal and UPnP.
See the
Chapter 11 on page 171
Cautions with UPnP
The automated nature of NAT traversal applications in establishing their own services and opening
firewall ports may present network security issues. Network information and configuration may also be
obtained and modified by users in some network environments.
When a UPnP device joins a network, it announces its presence with a multicast message. For security
reasons, the VMG allows multicast messages on the LAN only.
All UPnP-enabled devices may communicate freely with each other without additional configuration.
Disable UPnP if this is not your intention.
UPnP and Zyxel
Zyxel has achieved UPnP certification from the Universal Plug and Play Forum UPnP™ Implementers
Corp. (UIC). Zyxel's UPnP implementation supports Internet Gateway Device (IGD) 1.0.
See
Section 8.4.1 on page 137
Finding Out More
See
Section 8.9 on page 141
8.1.3 Before You Begin
Find out the MAC addresses of your network devices if you intend to add them to the DHCP Client List
screen.
8.2 The LAN Setup Screen
Use this screen to set the Local Area Network IP address and subnet mask of your VMG. Click Network
Setting > Home Networking to open the LAN Setup screen.
Follow these steps to configure your LAN settings.
Enter an IP address into the IP Address field. The IP address must be in dotted decimal notation. This will
1
become the IP address of your VMG.
Enter the IP subnet mask into the IP Subnet Mask field. Unless instructed otherwise it is best to leave this
2
alone, the configurator will automatically compute a subnet mask based upon the IP address you
entered.
Chapter 8 Home Networking
for more information on NAT.
for examples of installing and using UPnP.
for technical background information on LANs.
VMG3925-B10C/B30C User's Guide
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