Справочник Пользователя для Netopia r9100

Network Address Translation works by remapping the source IP address of traffic from the LAN to a single static 
or dynamically assigned IP address shown to the remote side of the router.

When NAT is enabled, the Netopia R9100 can use either a statically assigned IP address or one dynamically 
assigned each time the router connects to the ISP. While a dynamically assigned IP address offers the ISP more 
flexibility, it does have an impor tant limitation: the router requires a static IP address to suppor t Web, FTP, or 
other ser vices available to the WAN. To suppor t these ser vices with NAT enabled, a ser vice can be associated 
with only one machine on the LAN. 

When connected to the Internet or some other large network using Network Address Translation, the individual 
machines on your LAN are not directly accessible from the WAN. NAT provides an inherently secure method of 
connection to the outside world.