movistar WLD71-T3, User Manual, Page: 46 / 61

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NAT Settings
Network Address Translation (NAT) is a technique which allows
several computers on a LAN to share an Internet connection.
The computers on the LAN use a “private” IP address range
while the WAN port is configured with a single “public”
IP address.
Along with connection sharing, NAT also hides internal
IP addresses from computers on the Internet.
NAT Type:
Cone: Based on a cone NAT type, the port is permanently open
and allows inbound connections from any external host.
Symmetric: Each request from the same internal IP address
and port to a specific destination IP address and port is
mapped to a unique external source IP address and port. Even
if the same internal host sends a packet with the same source
address and port but to a different destination, a different
mapping is used. Only an external host that receives a packet
from an internal host can send a packet back.
Select an
NAT type , and then click Apply . Click Cancel to undo
the settings.