Viewsonic WMG120 User Manual

ViewSonic Wireless Media Gateway

NAT is a function allows several networked PCs to share an 
Internet account using only a single IP address, which may be 
statically or dynamically assigned by your Service Provider.  Click 
“Add” to add more rule to NAT Configuration.

The WMG accomplishes this address sharing by translating the 
internal LAN IP addresses to public unique address/addresses on 
the Internet.  The internal LAN IP addresses can be either private 
addresses or registered addresses.  In NAT type, you can choose 
Many-to-one or Many-to-many.  In Many-to-one configuration, it 
translates multiple LAN IP addresses to one single public address 
on Internet.  In Many-to-many configuration, it translates multiple 
LAN IP addresses to a range of public addresses.  This will be 
used when your service provider provide you a range of IP 
addresses. 

A DMZ (Demilitarized Zone) is a buffer zone between the Internet, 
and your private networks.  It can be a public network typically 
used for Web, FTP and E-Mail servers that are accessed by 
external clients on the Internet.  Separating these public access 
server with your private network provide higher security for your 
network.

A DMZ Host is a computer that has all external Internet traffic 
forwarded to it.  This allows a computer to be exposed to 
unrestricted two-way communication.  This feature should be used 
only when necessary, since it is not protected by any security rules 
of the firewall.